ZATSUYOSEN!

(SHOSEI MARU in wartime)

IJN SHOSEI MARU:
Tabular Record of Movement


© 2015 Gilbert Casse and Peter Cundall


E 1928:
Osaka. Laid down by Amagasaki Zosensho K.K. shipyard for Amagasaki Kisenbu G.K. as a 998-tons cargo ship.

25 April 1929:
Launched and named SHOSEI MARU. [1]

E 1929:
Completed and registered at Osaka. Her Net Registered tonnage (NRT) is 607-tons. [2]

1931:
Her NRT is changed to 608-tons. [2]

29 October 1936:
Departs Osaka to attend the yearly special naval review and returns back to port later that day.

6 October 1938:
Requisitioned by the IJN.

22 October 1938:
Registered in the IJN as an auxiliary gunboat attached to the Yokosuka Naval District under Navy’s instruction No. 879. Assigned to the 3rd Gunboat Division under Navy’s instruction No. 880. Reserve Lt(jg) Togawa Tsutomu assumes command.

12 November 1938:
Departs Sasebo.

E 13 November 1938:
Arrives at Tokyo.

4 April 1939:
Comes alongside auxiliary gunboat NANKAI MARU No. 1 on starboard.

6 April 1939:
Released alongside from NANKAI MARU No. 1.

April 1939:
Departs Tokyo and arrives at Shanghai, China. Rated as gunboat No. 33.

1 June 1939:
Departs Shanghai.

22 June 1939:
Arrives at Kiangnan near Shanghai.

23 June 1939:
Enters Kiangnan shipyard drydock.

28 June 1939:
Undocked. Departs Kiangnan.

15 November 1939:
Assigned to the 13th Gunboat Division under Navy’s instruction No. 850. Reserve Lt Azuma Tsuneji assumes command.

15 September 1940:
Reserve Lt Nikki Isaburo assumes command.

4 November 1940:
Undocked.

15 November 1940:
Assigned to the 13th Gunboat Division under Navy’s instruction No. 837.

22 August 1941:
Reserve Lt Shimada Suetsugu assumes command.

15 October 1941:
Assigned to Vice Admiral Makita Kakusaburo’s (38) Shanghai Special Base Force in Captain Yano Mitoshi’s (42) 13th Gunboat Division also consisting of auxiliary gunboats HYAKUFUKU MARU and UNKAI MARU No. 10 under Navy’s instruction No. 1250.

5 November 1941:
Assigned to South Branch Corps, Amoy (now Xiamen) District, China, South patrol force.

8 November 1941:
Arrives at Amoy.

21 November 1941:
Rated as gunboat No. 133.

1 December 1941:
Assigned to Amoy District Forces under South Branch Corps secret instruction No. 18. Departs Amoy.

2 December 1941:
Arrives at Swatow (now Shantou), southern China. Surveys Swatow coast area.

3 December 1941:
Departs Swatow and arrives at Jieshi Bay later in the day.

4 December 1941:
Departs Jieshi Bay on patrol and arrives back there later that day.

6 December 1941:
Departs again Jieshi Bay on convoy’s escort.

7 December 1941:
S of Jieshi Bay, monitors the following British ships: salvage tug EDITH MOLLER, small steamer LIEN SHUI (91GRT) and lighter TAIKOO No. 24 (202 GRT).

8 December 1941:
Seizes British ships EDITH MOLLER, LIEN SHUI and TAIKOO No. 24. Comes alongside and loads fresh water from lighter KYOSEI MARU. Departs Jieshi Bay. At 1200, observes ships in movement. At 1256, drops anchor E of Dong Fan Shan harbour. At 1305, fires warning shots. At 1320, raiding party starts operation but is fired at from the coast. Fires 12 shots from 12cm gun and 950 rifle bullets. Arrives at Zhelang Point. At 1800, requisitions Zhelang lighthouse personal and other personal nearby.

9 December 1941:
Departs Zhelang Point and arrives at Jieshi Bay later that same day.

10 December 1941:
At 0815, comes alongside auxiliary storeship AZUCHI MARU and loads fresh food. At 1440, boarding party captures motorboat SHIN HUA and rummages Norwegian cargo ship DUKAT (later IJN requisitioned transport AMOY MARU). At 1830, achieves capture of British salvage tug READY MOLLER.

11 December 1941:
Departs Jieshi Bay on patrol and returns back there later in the day.

12 December 1941:
Departs Jieshi Bay on patrol and returns back there later that day.

14 December 1941:
Departs Jieshi Bay escorting seven captured ships.

15 December 1941:
Due to high waves, British tender EDITH MOLLER (later AMOY MARU No. 4) straggles behind the convoy and is escorted by SHOSEI MARU.

16 December 1941:
Both ships arrive at Amoy. SHOSEI MARU departs there to meet up with the other captured ships and arrives back at Amoy later that same day. Fresh food and fresh water supplied.

17 December 1941:
Replenishes coal and boiler water.

18 December 1941:
Departs Amoy.

19 December 1941:
Arrives at Jieshi Bay.

22 December 1941:
Departs Jieshi Bay.

23 December 1941:
Arrives at Nan’ao Island.

24 December 1941:
At 1300, disembarks a raiding party. At 1620, troops come back aboard. At 1845, arrives on patrol zone and listens to lighter NABURI MARU’s report.

25 December 1941:
At 0945, fresh food supplied by civilian (C-AK) cargo ship SHINKO MARU. At 1315, disembarks a raiding party. At 1645, troops come back aboard.

26 December 1941:
Departs Nan’ao Island and arrives at Shenquan port later that same day.

27 December 1941:
Departs Shenquan, calls at Zhelang Point and later arrives at Weitou Bay. Departs there and arrives at Hunghai Bay later in the day.

28 December 1941:
Departs Hunghai Bay and gives chase to a suspect boat. Arrives back at Hunghai Bay later that day to attend damaged storeship NOJIMA. [3]

29 December 1941:
NOJIMA transfers rice and barley foodstuffs to SHOSEI MARU. Auxiliary gunboat CHOHAKUSAN MARU arrives to render assistance.

2 January 1942:
Lighter KYOSEI MARU comes alongside and transfers fresh water to SHOSEI MARU.

3 January 1942:
Lighter HEIYU MARU urgently transfers 300 gravel bags and 500 cement bags to NOJIMA. Auxiliary gunboat CHOHAKUSAN MARU departs for Mako.

4 January 1942:
Assigned to Shanghai District 6th Patrol Corps under Shanghai District instruction No. 165. Lighter HEIYU MARU transfers timber to NOJIMA. Fresh water supplied by a lighter.

7 January 1942:
Transfers hull plating to NOJIMA.

8 January 1942:
Fresh water supplied by lighter KYOSEI MARU.

10 January 1942:
Fresh food supplied by auxiliary storeship AZUCHI MARU.

12 January 1942:
Fresh water supplied by lighter KYOSEI MARU.

15 January 1942:
Fresh food supplied by auxiliary storeship AZUCHI MARU.

17 January 1942:
Released from South Branch Corps, Amoy District, South patrol force under instruction No. 99.

18 January 1942:
Assigned to Shanghai District Base Unit. Transfers more salvage material to NOJIMA. Coal supplied by lighter KYOSEI MARU.

19 January 1942:
Departs Hunghai Bay on training mission and returns to area. Departs there sailing alone later in the day.

21 January 1942:
Arrives at Amoy.

22 January 1942:
Replenishes coal and boiler water.

23 January 1942:
Fresh food supplied by auxiliary storeship AZUCHI MARU.

24 January 1942:
Departs Amoy.

27 January 1942:
Arrives at Bell Buoy, Shanghai.

28 January 1942:
Departs Bell Buoy and arrives at Shanghai later that day tethering to Buoy No. 3. Assigned to Shanghai District 6th Patrol Corps.

1 February 1942:
Departs Shanghai and arrives at Kiangnan later that day.

2 February 1942:
Enters drydock for maintenance and repairs.

13 February 1942:
Undocked. Tethers to pier.

24 February 1942:
Hull, weapons and other repairs are completed.

25 February 1942:
Loads gunpowder, shells, depth-charges (DCs) and stored grain products.

26 February 1942:
Replenishes coal.

27 February 1942:
Undergoes full hull and superstructure coating.

28 February 1942:
Departs Kiangnan on trials and arrives back there later that same day. Fresh food supplied.

1 March 1942:
Undergoes machinery repairs. Departs later that day and arrives at Shanghai.

2 March 1942:
Departs Shanghai and arrives at Yawosha later that same day.

3 March 1942:
Departs Yawosha on patrol mission in C area and arrives at Ssu Chiao Shan (now Sijiao Island), Shengsi Archipelago later in the day.

4 March 1942:
Departs Ssu Chiao Shan on patrol mission in C area and arrives at Chen Quian Shan later that day.

6 March 1942:
Departs Chen Quian Shan on patrol mission in C area and returns back there later that same day.

7 March 1942:
Departs Chen Quian Shan and calls at Tongdao. Departs there on patrol mission in SKA route and arrives at Ssu Chiao Shan later in the day. Fresh food supplied by auxiliary storeship KOSOKU MARU No. 3.

8 March 1942:
Departs Ssu Chiao Shan on patrol mission in B area and arrives at Jigujiao later that day.

10 March 1942:
Departs Jigujiao on sweeping mission in SKB route and returns back there later that same day.

13 March 1942:
Departs Jigujiao on patrol mission in AB area and arrives at Tongsha later in the day.

14 March 1942:
Departs Tongsha on patrol mission in A area and arrives at Shanghai later that day. Coal replenished at the Mitsui pier.

15 March 1942:
Fresh food supplied. Departs Shanghai on patrol mission in A area and arrives at Bell Buoy later in the day.

17 March 1942:
Departs Bell Buoy on training and patrol missions and returns back there later that day.

18 March 1942:
Departs again Bell Buoy. At 2200, starts escorting a convoy consisting of IJA transports CHIKUZEN, KOHOKU, RYUKO and PEKING MARUs.

19 March 1942:
At 0500, ends escort and begins patrol mission. Calls at Ssu Chiao Shan to be supplied with fresh food supplied by auxiliary storeship KOSOKU MARU No. 3. Departs there and resumes patrol mission in B area.

21 March 1942:
Arrives back at Ssu Chiao Shan.

24 March 1942:
Departs Ssu Chiao Shan on convoy escort mission and calls at Bell Buoy. At 0700, 18 nautical miles S of Dongting Island, escort is taken over by auxiliary gunboat NISSHO MARU No. 12. Undergoes DC drill and drops one Type 95 DC.

25 March 1942:
Arrives at Ssu Chiao Shan.

26 March 1942:
Departs Ssu Chiao Shan on patrol mission in AB area and arrives at Wusong later in the day.

27 March 1942:
Undergoes full coating to hull, superstructure and accommodations.

28 March 1942:
Departs Wusong and arrives at Shanghai later that day. Tethers to Buoy No. 3. Undergoes hull, weapons and machinery maintenance and repairs.

29 March 1942:
Fresh food supplied.

31 March 1942:
Tethers to the Navy pier.

1 April 1942:
Departs Shanghai.

2 April 1942:
Arrives at Jigujiao. Departs there on patrol mission in C area and arrives at Ssu Chiao Shan later that day.

6 April 1942:
Fresh food supplied by auxiliary storeship BANSHU MARU No. 21.

7 April 1942:
Departs Ssu Chiao Shan on patrol mission in C area.

8 April 1942:
Arrives at Jang Tu Shan.

10 April 1942:
Departs Jang Tu Shan on patrol mission in C area and arrives at Ssu Chiao Shan later that same day.

11 April 1942:
Departs Ssu Chiao Shan and calls at Chen Quian Shan. Departs there and arrives at Tongsha later in the day.

12 April 1942:
Departs Tongsha on patrol mission in A area and arrives at Wusong later that day.

13 April 1942:
Departs Wusong and arrives at Shanghai later that same day. Tethers to the Navy’s pier. Replenishes coal and boiler water.

14 April 1942:
Departs Shanghai on patrol mission in A area and arrives at Jiuduan later in the day.

15 April 1942:
Departs Jiuduan on patrol mission in C area and arrives at Lu Hu Shan later that day.

18 April 1942:
Departs Lu Hu Shan on patrol mission in C area and arrives at Ssu Chiao Shan later that same day. Fresh food supplied by auxiliary storeship BANSHU MARU No. 21.

20 April 1942:
Departs Ssu Chiao Shan on patrol mission in C area.

21 April 1942:
Arrives at Putuoshan.

23 April 1942:
Departs Putuoshan on patrol mission in C area and arrives at Ssu Chiao Shan later in the day.

24 April 1942:
Departs Ssu Chiao Shan northern coast and arrives at Ssu Chiao Shan southern coast later that day. Receives documents from auxiliary storeship KOSOKU MARU No. 3.

26 April 1942:
Departs Ssu Chiao Shan on patrol mission in A and C areas and arrives at Wusong later that same day.

27 April 1942:
Departs Wusong and arrives at Shanghai later in the day. Tethers to buoy No. 4.

28 April 1942:
Loads stored grain products.

30 April 1942:
Tethers to the Navy pier.

1 May 1942:
Replenishes coal and boiler water. Departs Shanghai on patrol mission in A area and arrives at Jiuduan later in the day.

7 May 1942:
Departs Jiuduan and arrives at Wusong later that day.

9 May 1942:
Departs Wusong and arrives at later that same day.

10 May 1942:
Departs Ssu Chiao Shan on patrol off Chen Quian Shan and arrives back at Ssu Chiao Shan later in the day.

12 May 1942:
Departs Ssu Chiao Shan on gunnery drill S of Chen Quian Shan and arrives back at Ssu Chiao Shan later that day. Fresh food supplied by auxiliary storeship BANSHU MARU No. 21.

15 May 1942:
Departs Ssu Chiao Shan on patrol E of Yushan and arrives at Jiuduan later that same day.

16 May 1942:
Departs Jiuduan and arrives at Wusong later in the day.

17 May 1942:
Departs Wusong and arrives at Shanghai later that day. Supplied and coal replenished.

18 ~ 20 May 1942:
Undergoes hull, weapons and machinery maintenance and repairs. Fresh food and canteen goods supplied.

21 May 1942:
Departs Shanghai and arrives at Bell Buoy later that same day.

22 May 1942:
Departs Bell Buoy and arrives at Ssu Chiao Shan later in the day.

23 May 1942:
Shifts to rolling anchor.

24 May 1942:
Fresh food supplied by auxiliary storeship BANSHU MARU No. 21.

27 May 1942:
Departs Ssu Chiao Shan with small gunboat KYODO No. 215 and arrives at Putuoshan later that day.

28 May 1942:
Departs Putuoshan on ASW patrol.

29 May 1942:
Arrives at Hengsha.

30 May 1942:
Departs Hengsha and arrives at Jiuduan later that same day. Fresh food supplied by lighter SENSHO MARU.

31 May 1942:
Departs Jiuduan and arrives at Ssu Chiao Shan later in the day.

2 June 1942:
Departs Ssu Chiao Shan and arrives at Wusong later that day.

3 June 1942:
Departs Wusong and arrives at Shanghai later that same day. Tethers to Buoy No. 7.

4 June 1942:
Replenishes coal. Supplied with fresh food and canteen goods.

5 June 1942:
Departs Shanghai and arrives at Jiuduan later in the day.

8 June 1942:
Departs Jiuduan and arrives at Wusong later that day.

9 June 1942:
Departs Wusong and arrives at Ssu Chiao Shan later that same day.

15 June 1942:
Departs Ssu Chiao Shan and arrives at Wusong later in the day.

18 June 1942:
Departs Wusong and arrives at Shanghai. Tethers to the Navy pier and replenishes coal. At 1500, transfers to Buoy No. 6.

19 June 1942:
Fresh food supplied.

20 June 1942:
Undergoes maintenance to hull, weapons and machinery.

21 June 1942:
Fresh food supplied.

22 June 1942:
Departs Shanghai and arrives at Bell Buoy later that day.

23 June 1942:
Departs Bell Buoy and arrives at Ssu Chiao Shan later that same day.

25 June 1942:
Departs Ssu Chiao Shan and arrives at Dongting Island later in the day.

26 June 1942:
Departs Dongting Island and relieves auxiliary gunboat TOSHO MARU from a convoy’s escort. Escort ends off Huaniaoshan.

27 June 1942:
Arrives at Chen Quian Shan. Departs there and arrives at Ssu Chiao Shan later that day.

1 July 1942:
Assigned to assist until 25th July, Raiding Force under Shanghai District instruction No. 18. Fresh food supplied by auxiliary storeship BANSHU MARU No. 21. Departs Ssu Chiao Shan on patrol and returns back to port later that same day.

2 July 1942:
Departs Ssu Chiao Shan and arrives at Shanghai later in the day.

3 July 1942:
Replenishes coal at the Asahi pier.

5 July 1942:
Assigned to assist Raiding Force under secret instruction No. 5. Loads stored grain products and ammunition and embarks a raiding party.

6 July 1942:
Fresh food supplied and completes boarding of the raiding party. Departs Shanghai later that day.

7 July 1942:
Arrives at Taohua Shan.

8 July 1942:
Departs Taohua Shan. At 1810, starts escort of a convoy consisting of unidentified IJA transports.

9 July 1942:
At 1630, ends escort off Qiqu Archipelago. At 1840, arrives at Yuet Ching Bay. At 2145, disembarks the raiding party and fires four warning shots with her 12cm gun. At 2156, stops the shelling.

10 July 1942:
Departs Yuet Ching Bay and arrives at Fei Yun Jiang later that same day.

12 July 1942:
Departs Fei Yun Jiang and arrives at Heiniu Bay later in the day.

14 July 1942:
Departs Heiniu Bay and arrives at Yuet Ching Bay.

16 July 1942:
Fresh water supplied by IJN tanker (B-AO) TAKATORI MARU No. 1.

17 July 1942:
At 0330, the raiding party disembarks. At 0630, the landing is successful. At 1915, fresh food supplied by an unidentified BANSHU MARU No?

24 July 1942:
Fresh water supplied by auxiliary collier/oiler KORYU MARU.

25 July 1942:
At 1240, the raiding party comes back aboard. Released from the Raiding Force Operation under Shanghai District secret instruction No. 246. At 1540, departs Yuet Ching Bay.

26 July 1942:
Arrives at Ssu Chiao Shan. Departs there later that day.

27 July 1942:
Arrives at Wusong. Departs there and arrives at Shanghai later that same day. Tethers to the ammunition pier. Disembarks the raiding party and lands their equipment and weapons.

28 July 1942:
Departs Shanghai and arrives at Kiangnan. Enters drydock for hull, weapons and machinery maintenance and repairs.

4 August 1942:
Fresh food supplied.

8 August 1942:
Stored grain products supplied.

11 August 1942:
Undocked. Departs Kiangnan on trials and arrives at Shanghai later in the day.

12 August 1942:
Fresh food supplied. Departs Shanghai and arrives at Jiuduan later that day.

13 August 1942:
Departs Jiuduan towards SK Point and calls at Tongdao. Departs there later that same day.

14 August 1942:
Arrives at Ssu Chiao Shan.

17 August 1942:
Fresh food supplied.

18 August 1942:
Departs Ssu Chiao Shan and arrives at Sheshan later in the day.

19 August 1942:
Departs Sheshan.

20 August 1942:
Arrives at Ssu Chiao Shan.

22 August 1942:
Departs Ssu Chiao Shan on suspect ships’ inspection mission and returns back to port later that day.

23 August 1942:
Fresh food supplied.

26 August 1942:
Departs Ssu Chiao Shan and arrives at Wusong later that same day.

27 August 1942:
Departs Wusong and arrives at Shanghai. Replenishes coal and boiler water.

28 August 1942:
Departs Shanghai and arrives at Chong Bao Sha later in the day.

29 August 1942:
Departs Chong Bao Sha towards S of the estuary and arrives at Sheshan later that day.

31 August 1942:
Departs Sheshan and arrives S of the estuary later that same day.

1 September 1942:
Seizes four salt smuggling junks. Departs S of the estuary towing the four captured junks and arrives off San Chong later in the day.

2 September 1942:
Departs San Chong waters and calls at Wusong. Delivers the junks to the port authorities and departs Wusong. Arrives at Tongsha later that day.

3 September 1942:
Departs Tongsha towing two seized junks and arrives at Wusong later that same day. Delivers the junks to the port authorities.

4 September 1942:
Departs Wusong and arrives at Jinshan later in the day.

5 September 1942:
Departs Jinshan and arrives S of the estuary later that day.

7 September 1942:
Departs S of the estuary and arrives at Ssu Chiao Shan later that same day.

8 September 1942:
Departs Ssu Chiao Shan and arrives at Tongsha later in the day.

9 September 1942:
Departs Tongsha and arrives at Ssu Chiao Shan later that day.

10 September 1942:
Departs Ssu Chiao Shan on operation and gunnery drills and returns back to port later that same day.

13 September 1942:
Departs Ssu Chiao Shan and arrives at Shanghai later in the day. Tethers to the Navy pier.

14 ~ 17 September 1942:
Undergoes hull, weapons and machinery maintenance and repairs.

18 September 1942:
Departs Shanghai and arrives at Hengsha later that day.

19 September 1942:
At 0900, lands a raiding party. Troops come back aboard at 1400.

20 September 1942:
Departs Hengsha and arrives at Ssu Chiao Shan later that same day.

30 September 1942:
Departs Ssu Chiao Shan and arrives at Wusong later in the day.

1 October 1942:
Departs Wusong and arrives at Shanghai later that day. Tethers to the Navy pier and replenishes coal and boiler water.

2 October 1942:
Departs Shanghai on ASW sweeping mission in the area where IJA transport LISBON MARU was torpedoed the day before. [3]

3 October 1942:
Arrives at Tung Fusham Island. At 1330, lands a raiding party. 269 POWs are recaptured on the Island. At 2000, troops come back aboard.

4 October 1942:
At 0830, lands the raiding party. At 1200, troops come back aboard. At 1400, all POWs are transferred to auxiliary gunboat HYAKUFUKU MARU. At 1600, departs Tung Fusham Island and at 2000, arrives at Jiang Tu harbour.

5 October 1942:
At 0900, lands a raiding party. At 1230, troops come back aboard. Fresh food supplied by auxiliary storeship KOSOKU MARU No. 3.

7 October 1942:
Departs Jiang Tu. Calls at Dong Ting Island. Departs there and calls at Tongdao. Departs there and arrives at Ssu Chiao Shan later that same day.

13 October 1942:
Departs Ssu Chiao Shan and arrives at Wusong later in the day.

14 October 1942:
Departs Wusong and arrives at Shanghai later that day. Tethers to the Navy pier and replenishes coal. Transfers later that day to Buoy No. 3 and replenishes coal again.

15 October 1942:
Stored grain products and fresh food supplied.

18 October 1942:
Fresh food supplied. Departs Shanghai and arrives at Jiuduan later that same day.

19 October 1942:
Departs Jiuduan on ASW sweep.

20 October 1942:
Arrives at Ssu Chiao Shan.

22 October 1942:
Fresh food supplied by civilian storeship BANSHU MARU No. 22.

27 October 1942:
Departs Ssu Chiao Shan on ASW sweep.

28 October 1942:
Arrives back at Ssu Chiao Shan.

1 November 1942:
Departs Departs Ssu Chiao Shan again and arrives at Wusong later in the day.

2 November 1942:
Departs Wusong and arrives at Shanghai later that day. Tethers to the Navy pier and replenishes coal, boiler water and fresh food.

3 November 1942:
Departs Shanghai and arrives at Jiuduan later that day.

4 November 1942:
Departs Jiuduan and arrives at Ssu Chiao Shan later that same day.

5 November 1942:
Departs Ssu Chiao Shan and arrives at Chen Quian Shan later in the day.

9 November 1942:
Departs Chen Quian Shan and calls at Tongdao. Departs there and calls at Huaniaoshan. Departs there and arrives at Ssu Chiao Shan later that day.

10 November 1942:
Departs Ssu Chiao Shan and arrives at Luojia Shan later that same day.

11 November 1942:
Departs Luojia Shan.

12 November 1942:
Arrives off Chang Kiang, Yangtze River where IJN requisitioned cargo ship (B-AK) KOBE MARU collided with civilian cargo ship (C-AK) TENZAN MARU the day before. Both ships sank but no casualties were sustained. SHOSEI MARU embarks KOBE MARU’s lifeboats No. 3, No. 7 and No. 8.

13 November 1942:
Arrives at Ssu Chiao Shan. Departs there and arrives at Huanglong Island later that day.

14 November 1942:
Departs Huanglong Island and arrives at Ssu Chiao Shan later that same day.

17 November 1942:
Departs Ssu Chiao Shan and arrives at Wusong later that same day.

18 November 1942:
Departs Wusong and arrives at Shanghai later in the day. Tethers at buoy No. 5. Delivers the three lifeboats to port authorities.

18 ~ 20 November 1942:
Undergoes hull, weapons and storage maintenance.

20 November 1942:
Canteen goods supplied.

21 November 1942:
Transfers to the coal pier.

22 November 1942:
Departs Shanghai and arrives at Jiuduan later in the day.

23 November 1942:
Departs Jiuduan and arrives at Ssu Chiao Shan later that day.

28 November 1942:
Fresh food supplied by civilian storeship BANSHU MARU No. 22.

29 November 1942:
Departs Ssu Chiao Shan on night patrol in B area.

30 November 1942:
Arrives back at Ssu Chiao Shan.

2 December 1942:
Departs Ssu Chiao Shan again and arrives at Wusong later that same day.

3 December 1942:
Departs Wusong and arrives at Shanghai later in the day. Replenishes boiler water and coal.

4 December 1942:
Departs Shanghai and arrives at Jiuduan later that day.

5 December 1942:
Departs Jiuduan and arrives at Ssu Chiao Shan later that same day.

13 December 1942:
Departs Ssu Chiao Shan and arrives S of the estuary later in the day.

14 December 1942:
Departs S of the estuary and arrives at Wusong later that day.

15 December 1942:
Departs Wusong and arrives at Kiangnan later that same day.

17 December 1942:
Enters drydock for maintenance and repairs.

31 December 1942:
Undocked.

13 January 1943:
Supplied with stored grain products.

16 ~ 17 January 1943:
Undergoes full inside and outside coating.

18 January 1943:
Supplied with shells, gunpowder, explosives and DCs.

21 January 1943:
Hull, weapons and machinery repairs are completed.

22 January 1943:
Transfers from pier to buoy No. 2.

23 January 1943:
Departs Kiangnan on trials and arrives at Shanghai later in the day. Tethers to the Navy pier.

24 January 1943:
Replenishes coal and loads fresh food. Departs Shanghai and arrives at Wusong later that day.

25 January 1943:
Departs Wusong and arrives at Ssu Chiao Shan later that same day.

30 January 1943:
At 1930, engages in a joint night raid drill with small auxiliary minesweeper KOHO (ex-British salvage tug DIANA MOLLER) MARU No. 2 GO.

31 January 1943:
Departs Ssu Chiao Shan on patrol and arrives back there later in the day.

6 February 1943:
Departs Ssu Chiao Shan again.

7 February 1943:
Arrives at Wusong. Departs there and arrives at Shanghai later that day. Tethers to the Navy pier and replenishes coal.

8 February 1943:
Fresh food supplied. Departs Shanghai and arrives at Bell Buoy later that same day.

9 February 1943:
Departs Bell Buoy and arrives at Dayang Shan later in the day.

12 February 1943:
Departs Dayang Shan and arrives at Luojia Shan later that day.

14 February 1943:
Departs Luojia Shan and arrives at Ssu Chiao Shan later that day.

20 February 1943:
Departs Ssu Chiao Shan and arrives at Hengsha later that same day. At 1230, lands a raiding party. Reports six casualties. At 2330, troops come back aboard.

21 February 1943:
Departs Hengsha and arrives at Shanghai. Embarks seven additional soldiers. Departs Shanghai and arrives at Hengsha later in the day.

22 February 1943:
Departs Hengsha and arrives at Ssu Chiao Shan later that day.

23 February 1943:
Departs Ssu Chiao Shan and arrives at Wusong later that same day.

24 February 1943:
Departs Wusong and arrives at Shanghai. Tethers to the Navy pier and replenishes coal. Transfers from the Navy pier to buoy No. 5 later in the day.

25 February 1943:
Supplied with stored grain products.

27 February 1943:
Fresh food supplied.

28 February 1943:
Departs Shanghai and arrives at Hengsha later that day.

1 March 1943:
Departs Hengsha and arrives at Ssu Chiao Shan later that same day.

4 March 1943:
Departs Ssu Chiao Shan.

5 March 1943:
Arrives at Dongting Island.

6 March 1943:
Departs Dongting Island and arrives at Ssu Chiao Shan later in the day.

9 March 1943:
Departs Ssu Chiao Shan on ASW and minesweeping duties.

10 March 1943:
Arrives at Ssu Chiao Shan.

11 March 1943:
Departs Ssu Chiao Shan and arrives at Wusong later that day.

12 March 1943:
Departs Wusong and arrives at Shanghai later that same day. Tethers to the Navy pier and replenishes coal.

13 March 1943:
Departs Shanghai and arrives at Bai Long later in the day. Lands troops. 10 junks are inspected.

14 March 1943:
Departs Bai Long and arrives at Ssu Chiao Shan later that day.

15 March 1943:
At 0938, departs Ssu Chiao Shan. At 1001, runs aground on a reef S of anchorage. At 1101, places a temporary patch on the damaged bow hull. At 1139, tries to disengage from reef without success. At 1450, finally disengages from reef and departs Ssu Chiao Shan waters.

16 March 1943:
Arrives at Wusong. Departs there and arrives at Kiangnan later that same day. Tethers to buoy No. 3.

17 March 1943:
Enters dock No. 2 drydock for extensive hull repairs.

27 March 1943:
Undocked.

29 March 1943:
Shells, bullets and gunpowder supplied. Fitted with additional DCs and related equipment.

30 March 1943:
Supplied with stored grain products.

31 March 1943:
Transfers to rolling anchor. Departs Kiangnan and arrives at Shanghai. Departs there and arrives at Wusong later in the day.

4 April 1943:
Departs Wusong and arrives at Bell Buoy later that day.

5 April 1943:
Departs Bell Buoy and arrives at Ssu Chiao Shan later that same day.

6 April 1943:
Transfers to rolling anchor.

9 April 1943:
Departs Ssu Chiao Shan and arrives at Wusong later in the day.

10 April 1943:
Departs Wusong and arrives at Shanghai later that day. Tethers to the Navy pier. Replenishes charcoal and boiler water.

12 April 1943:
Departs Shanghai and arrives at Jigujiao later that same day.

13 April 1943:
Departs Jigujiao on ASW patrol.

16 April 1943:
Arrives at Ssu Chiao Shan.

21 April 1943:
Departs Ssu Chiao Shan and arrives at Sheshan later in the day.

22 April 1943:
Departs Sheshan on night ASW patrol.

23 April 1943:
Arrives at Huang Ching Island. Lands a raiding party.

24 April 1943:
Departs Huang Ching Island and arrives at Ssu Chiao Shan later that day.

25 April 1943:
Departs Ssu Chiao Shan and arrives at Wusong later that same day.

26 April 1943:
Departs Wusong and arrives at Kiangnan later in the day. Tethers to buoy No. 2.

27 Apri1 ~ 2 June 1943:
Undergoes hull, machinery and weapons repairs.

3 June 1943:
Departs Kiangnan and arrives at Shanghai later in the day.

4 June 1943:
Departs Shanghai and arrives at Bai Long port later that day.

5 June 1943:
Departs Bai Long port and arrives at Ssu Chiao Shan later that same day.

11 June 1943:
Departs Ssu Chiao Shan on patrol and arrives back there later in the day.

12 June 1943:
Departs Ssu Chiao Shan northern tip and arrives at Ssu Chiao Shan southern tip later that day.

15 June 1943:
Departs Ssu Chiao Shan and arrives at Huaniaoshan later that same day.

16 June 1943:
Departs Huaniaoshan and arrives at Ssu Chiao Shan later in the day.

18 June 1943:
Departs Ssu Chiao Shan on navigation training and gunnery drill and arrives back there later that day.

19 June 1943:
Departs Ssu Chiao Shan on patrol.

20 June 1943:
Arrives at Wusong. Departs there and arrives at Shanghai later that same day. Tethers to the Navy pier and replenishes charcoal and boiler water.

21 June 1943:
Fitted with minesweeping equipment and buoys.

22 June 1943:
Departs Shanghai and arrives at Jiuduan later in the day.

23 June 1943:
Departs Jiuduan and arrives at Huaniaoshan later that day.

27 June 1943:
Departs Huaniaoshan on ASW sweep five nautical miles N of Huaniaoshan and arrives at Luhuashan later that same day.

28 June 1943:
Departs Luhuashan on patrol off Jiaogui light buoy and arrives at Ssu Chiao Shan later in the day.

29 June 1943:
Reserve Lt Shimada Suetsugu is confirmed as CO. Departs Ssu Chiao Shan on night ASW patrol.

30 June 1943:
Arrives at Chiao Ban Island.

1 July 1943:
Departs Chiao Ban Island and arrives at Huaniaoshan later that day.

2 July 1943:
Departs Huaniaoshan and arrives at Kiangnan later that same day.

6 July 1943:
Departs Kiangnan and arrives at Shanghai later in the day.

8 July 1943:
Departs Shanghai and arrives at Ssu Chiao Shan later that day.

10 July 1943:
Departs Ssu Chiao Shan and arrives at Huaniaoshan later that same day.

13 July 1943:
Departs Huaniaoshan and arrives off Huaniaoshan coast later in the day.

13 ~ 16 July 1943:
Engages in minesweeping.

16 July 1943:
Departs Huaniaoshan coast and arrives at Huaniaoshan later that day.

17 July 1943:
Reports one lifeboat lost and one cutter damaged during a typhoon. Departs Huaniaoshan and arrives at Ssu Chiao Shan later that same day.

19 July 1943:
Departs Ssu Chiao Shan and arrives at Huaniaoshan later in the day.

20 July 1943:
Departs Huaniaoshan and arrives at Wusong later that day.

21 July 1943:
Departs Wusong and arrives at Shanghai later that same day. Tethers to the Navy pier and replenishes charcoal and boiler water.

22 July 1943:
Departs Shanghai and arrives at Hengsha later that same day.

23 July 1943:
Departs Hengsha and arrives at Huaniaoshan later in the day.

24 July 1943:
Departs Huaniaoshan and arrives at Ssu Chiao Shan later that day.

29 July 1943:
Departs Ssu Chiao Shan and arrives at Huaniaoshan later that same day.

1 ~3 August 1943:
Engages in minesweeping.

4 August 1943:
Departs Huaniaoshan and arrives at Wusong later in the day.

5 August 1943:
Departs Wusong and arrives at Kiangnan later that day.

6 ~ 8 August 1943:
Fitted with new capstan and anchor chains. Undergoes hull and weapons repairs.

9 August 1943:
Departs Kiangnan and arrives at Shanghai later that same day.

10 August 1943:
Departs Shanghai and arrives at Wusong later in the day.

11 August 1943:
Comes alongside the Army railway pier to cut off both anchors.

12 August 1943:
Fitted with provisional anchors.

13 August 1943:
Assigned to Shanghai District Forces, 4th Patrol Corps under Shanghai District instruction No. 291. Departs Wusong on recon mission and arrives off Gaoqiao Beach later that day.

14 August 1943:
Departs Gaoqiao Beach waters on recon mission and arrives at Wusong. Departs there and arrives at Kiangnan later that same day.

15 ~ 23 August 1943:
Undergoes holds cleaning, inside and outside maintenance, hull and weapons repairs and anchor chains care.

24 August 1943:
Departs Kiangnan.

25 August 1943:
Arrives at Luhuashan.

28 August 1943:
Departs Luhuashan and arrives at Ssu Chiao Shan later in the day.

30 August 1943:
Departs Ssu Chiao Shan on ASW sweep. Drops five DCs. Supplied with eight DCs by gunboat craft No. 105.

1 September 1943:
Arrives off Huaniaoshan.

2 September 1943:
Departs Huaniaoshan waters and arrives at Ssu Chiao Shan.

4 September 1943:
Departs Ssu Chiao Shan on patrol and arrives back there later that day.

6 September 1943:
Departs Ssu Chiao Shan again and arrives off Huaniaoshan later that same day.

7 September 1943:
Departs Huaniaoshan waters and arrives at Wusong later in the day.

8 September 1943:
Departs Wusong and arrives at Shanghai later that day.

9 September 1943:
Departs Shanghai and arrives at Pudong Bridge, Shanghai later that same day.

10 September 1943:
Replenishes charcoal and boiler water. Departs Pudong Bridge and arrives at Shanghai later in the day.

11 September 1943:
Replenishes charcoal and boiler water.

12 September 1943:
Departs Shanghai and arrives at the estuary entrance buoy later that day.

13 September 1943:
Departs the estuary entrance buoy on ASW sweep. Drops DCs on unidentified target.

14 September 1943:
Arrives at Ssu Chiao Shan.

18 September 1943:
Departs Ssu Chiao Shan and arrives at Luhuashan later that same day.

21 September 1943:
Departs Luhuashan and calls at Chen Quian Shan. Departs there and arrives back at Luhuashan later in the day.

22 September 1943:
Departs Luhuashan again on gunnery drill and arrives back there later that day.

23 September 1943:
Departs Luhuashan again and calls at Ssu Chiao Shan. Departs there and arrives at Hengsha later that same day.

24 September 1943:
Departs Hengsha and arrives at Huaniaoshan later in the day.

25 September 1943:
Departs Huaniaoshan escorting two unidentified troop transports and arrives at Luhuashan later that day.

26 September 1943:
Departs Luhuashan and arrives at Wusong later that day.

27 September 1943:
Departs Wusong and arrives at Shanghai later that same day.

28 September 1943:
Departs Shanghai and arrives at Wusong later in the day.

29 September 1943:
Departs Wusong and arrives in Jiuduan waters. Departs there and arrives at Luhuashan later that day.

30 September 1943:
Departs Luhuashan and arrives at Luojia Shan later that same day.

3 October 1943:
Departs Luojia Shan and arrives at Ssu Chiao Shan later in the day.

4 October 1943:
Departs Ssu Chiao Shan on patrol.

5 October 1943:
Arrives at Luhuashan.

6 October 1943:
Departs Luhuashan and arrives at Wusong later that day.

7 October 1943:
Departs Wusong and arrives at Shanghai later that same day.

10 October 1943:
Reserve Lt Tauchi Hisao assumes command.

12 October 1943:
Reserve Lt Shimada disembarks. Departs Shanghai and arrives at Hengsha later in the day.

13 October 1943:
Departs Hengsha and arrives at Ssu Chiao Shan later that day.

15 October 1943:
Departs Ssu Chiao Shan on patrol and returns back there later that same day.

17 October 1943:
Departs Ssu Chiao Shan again and arrives at Luhuashan later in the day.

18 October 1943:
Departs Luhuashan.

19 October 1943:
Arrives at Ssu Chiao Shan.

20 October 1943:
Departs Ssu Chiao Shan and arrives at Luhuashan later that day.

21 October 1943:
Departs Luhuashan escorting four unidentified troop transports and arrives at Chen Quian Shan later that same day.

22 October 1943:
Departs Chen Quian Shan and arrives at Ssu Chiao Shan later in the day.

25 October 1943:
Departs Ssu Chiao Shan and arrives at Wusong later that day.

26 October 1943:
Departs Wusong and arrives at Kiangnan later that same day. Undergoes holds inspection.

27 October ~ 11 November 1943:
Undergoes holds, hull and weapons maintenance and repairs.

12 November 1943:
Departs Kiangnan and arrives at Shanghai later that same day. Replenishes charcoal and boiler water.

13 November 1943:
Departs Shanghai.

14 November 1943:
Arrives at Ssu Chiao Shan.

23 November 1943:
Departs Ssu Chiao Shan and arrives at Tantoushan later in the day.

24 November 1943:
Departs Tantoushan and arrives in Niubi Shan Strait later that day.

25 November 1943:
Departs Niubi Shan Strait and arrives at Ssu Chiao Shan later that same day.

26 November 1943:
Assigned to escort convoy No. 4 under Shanghai District instruction No. 66. Departs Ssu Chiao Shan and arrives at Wusong later in the day.

27 November 1943:
Departs Wusong and arrives at Shanghai later that same day.

28 November 1943:
Departs Shanghai and arrives at Bell Buoy later in the day.

29 November 1943:
Departs Bell Buoy and arrives at Zhangtushan later that day.

30 November 1943:
Departs Zhangtushan and arrives at Luojia Shan later that same day.

1 December 1943:
Departs Luojia Shan and arrives in Niubi Shan Strait later in the day.

2 December 1943:
Departs Niubi Shan Strait waters and arrives at Zhangtushan later that day.

3 December 1943:
Transfers to rolling anchor.

5 December 1943:
Supplied with fresh food at rolling anchor.

6 December 1943:
Departs Zhangtushan and arrives in Niubi Shan strait later that same day.

7 December 1943:
Departs Niubi Shan strait waters.

8 December 1943:
Arrives at Wusong. Departs there and arrives at Shanghai later in the day.

10 December 1943:
Fresh food supplied.

12 December 1943:
Departs Shanghai and arrives at Yawosha later that day.

13 December 1943:
Departs Yawosha and arrives at Zhangtushan later that same day.

14 December 1943:
Departs Zhangtushan and arrives at Taohua Shan later in the day.

15 December 1943:
Departs Taohua Shan and calls at Jiu Shan islands. Departs there later that day.

16 December 1943:
Arrives at Zhangtushan.

17 December 1943:
Fresh food supplied.

20 December 1943:
Departs Zhangtushan searching for an Army aircraft that ditched and arrives at there Tang Nao Shan later that same day.

21 December 1943:
Departs Tang Nao Shan resuming search for Army aircraft. Arrives at Zhenhai later in the day.

22 December 1943:
Departs Zhenhai and arrives at Wusong later that day.

23 December 1943:
Departs Wusong and arrives at Shanghai later that same day.

24 December 1943:
Supplied with stored grain products and fresh food. Departs Shanghai and arrives at Bell Buoy later in the day.

25 December 1943:
Departs Bell Buoy and arrives at Ssu Chiao Shan later that day.

26 December 1943:
Departs Ssu Chiao Shan and arrives at Niubi Shan later that same day.

27 December 1943:
Departs Niubi Shan and arrives at Jiu Shan Islands later in the day.

28 December 1943:
Departs Jiu Shan Islands and arrives at Niubi Shan later that day.

29 December 1943:
Departs Niubi Shan and arrives at Zhangtushan later that same day.

30 December 1943:
Fresh food supplied.

5 January 1944:
Fresh food supplied. Departs Zhangtushan and arrives at Niubi Shan later in the day.

6 January 1944:
Departs Niubi Shan and calls at Jiu Shan Islands. Departs there and arrives at Zhangtushan later that day.

9 January 1944:
Departs Zhangtushan and arrives at Wusong later that same day.

10 January 1944:
Departs Wusong and arrives at Shanghai later in the day.

14 January 1944:
Supplied with fresh food and clothing. Departs Shanghai and arrives at Wusong later that day.

15 January 1944:
Departs Wusong and arrives at Ssu Chiao Shan later that same day.

16 January 1944:
Departs Ssu Chiao Shan and arrives at Zhangtushan later in the day.

18 January 1944:
Departs Zhangtushan and arrives at Jiu Shan Islands later that day.

20 January 1944:
Fresh food supplied.

21 January 1944:
Departs Jiu Shan Islands and arrives at Zhangtushan later that same day.

26 January 1944:
At 0705, 13th Gunboat Division’s raiding parties assault village. At 1648, troops come back aboard.

27 January 1944:
Fresh food supplied. Departs Zhangtushan.

28 January 1944:
Arrives at Wusong. Departs there and arrives at Shanghai later in the day.

29 January 1944:
Departs Shanghai and arrives at Yawosha later that day.

30 January 1944:
Departs Yawosha and arrives at Ssu Chiao Shan later that same day.

31 January 1944:
Departs Ssu Chiao Shan and arrives at Zhangtushan later in the day.

1 February 1944:
Departs Zhangtushan on patrol.

2 February 1944:
Arrives back at Zhangtushan. Departs there on patrol and arrives back to port later that day.

4 February 1944:
Departs Zhangtushan on patrol and arrives back to port later that same day.

8 February 1944:
Departs Zhangtushan and arrives at Ssu Chiao Shan later in the day.

9 February 1944:
Departs Ssu Chiao Shan and arrives at Wusong later that day.

10 February 1944:
Departs Wusong and arrives at Shanghai later that same day.

11 February 1944:
Undergoes maintenance, repairs and starts renovation.

14 February 1944:
Fresh food supplied.

16 February 1944:
Fresh food supplied.

19 February 1944:
Fresh food supplied.

18 February 1944:
Departs Dayang Shan and arrives at Dinghai. Departs there later that day.

20 February 1944:
Released from the 13th Gunboat Division under instruction No. 345. Removed from the Navy’s list under instruction No. 346. Registered again that same day as an auxiliary transport (Otsu) category attached to the Yokosuka Naval Base with Yokosuka as home port under instruction No. 347. Assigned directly to the Navy’s Department. [4]

14 March 1944:
Departs Shanghai.

20 March 1944:
Arrives at Sasebo.

15 April 1944:
Departs Sasebo.

16 April 1944:
Arrives at Sakito, Kyushu. Departs there later in the day.

17 April 1944:
Arrives at Tokuyama, Yamaguchi Prefecture.

24 April 1944:
Departs Tokuyama.

25 April 1944:
Arrives at Kobe.

26 April 1944:
Departs Kobe in convoy No. 8427 also consisting of civilian (C-AK) wartime standard 2E Type cargo ship TAKA MARU.

27 April 1944:
Arrives at Yura, Wakayama Prefecture.

28 April 1944:
Departs Yura and calls at Kushimoto, Wakayama Prefecture. Departs there later that day.

29 April 1944:
Arrives at Sakata, Yamagata Prefecture. Departs there later that same day.

1 May 1944:
Arrives at Yokohama.

6 May 1944:
At 1430, departs Yokohama in convoy No. 3506 also consisting of auxiliary storeships MAMIYA and TAKUNAN MARUs, auxiliary transport UNKAI MARU No. 10 and IJA transport KAIKO MARU escorted by auxiliary cable layer OSEI MARU, auxiliary subchasers SHOWA MARU No. 8, CHa-54, CHa-56 and CHa-57. The convoy arrives at Tateyama later in the day.

8 May 1944:
The convoy departs Tateyama. Auxiliary minesweeper SHOWA MARU No. 7 bolsters the escort.

10 May 1944:
Due to mechanical failure, SHOWA MARU No. 7 straggles behind the convoy.

12 May 1944:
The convoy arrives at Futami Harbour, Chichi-Jima, Ogasawara Gunto (Bonins).

14 May 1944:
Departs Chichi-Jima still in convoy No. 3506 at this point also consisting of auxiliary storeships MAMIYA and TAKUNAN MARUs, auxiliary transports TAITO MARU and UNKAI MARU No. 10 and IJA transport KAIKO MARU escorted by auxiliary cable layer OSEI MARU, auxiliary subchasers SHOWA MARU No. 7 and SHOWA MARU No. 8, CHa-54, CHa-56 and CHa-57 and auxiliary netlayer KISHIN MARU.

15 May 1944:
UNKAI MARU No. 10 is detached from the convoy at some point and arrives at Iwo Jima, Ogasawara Gunto later that day.

20 May 1944:
The convoy arrives at Saipan, Marianas.

22 May 1944:
Departs Saipan and calls at Tinian, Marianas. Departs there and arrives back at Saipan later in the day.

June 1944:
Bombed by USN aircraft and/or shelled by USN warships and sunk in Tanapag Harbour, Saipan with unknown casualties. [5]

10 March 1945:
Removed from the Navy’s list under instruction No. 232.

________________________________________


Authors notes :
[1] Not to be confused with IJA tanker No. 2051 (5,593 GRT, ’22), or auxiliary netlayer (773 GRT ’28).

[2] NRT is a ship's cargo volume capacity expressed in "register tons", one of which equals to a volume of 100 cubic feet (2.83 m3). It is calculated by subtracting non-revenue-earning spaces i.e. spaces not available for carrying cargo, for example engine rooms, fuel tanks and crew quarters, from the ship's gross register tonnage (GRT). Net register tonnage (NRT) is not a measure of the weight of the ship or its cargo, and should not be confused with terms such as deadweight tonnage or displacement.

[3] LISBON MARU was torpedoed by (later Cdr) Rob R. McGregor's (USNA ’29) USS GROUPER (SS-214). She sank on 2 Oct ’42 at 30-17N, 123-13E with the loss of three IJA soldiers and 826 POWs.

[4] There were two categories of Zatsuyosen. (Ko) category with an IJN Captain as supervisor aboard and (Otsu) category without.

[5] Alden’s 4th Ed. reports SHOSEI MARU as torpedoed and sunk off Saipan on 20 Jun ’44 by USS SILVERSIDES (SS-236) but that statement is probably incorrect according to Japanese sources.

Thanks go to Gengoro S. Toda of Japan. Thanks go also to Gregory Ampen of France for assistance with the picture.

Gilbert Casse and Peter Cundall.


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