ZATSUYOSEN!

(DAIGEN MARU No. 7, prewar)

IJN TOSHO MARU:
Tabular Record of Movement


© 2014 Gilbert Casse, Bob Hackett and Peter Cundall


Aug 1936:
Osaka. Laid down by Namura Zosensho K.K. shipyard for Konan Kisen K.K. as a 1,289-tons cargo ship.

30 November 1936:
Launched and named TOSHO MARU

6 April 1937:
Completed and registered in Tokyo.

1937:
Chartered to Hinode Kisen K.K.

27 September 1938:
Arrives at Jinkow, (now Zhenjiang), Central China.

6 November 1938:
Requisitioned by the IJN.

18 November 1938:
Registered in the IJN as an auxiliary gunboat attached to the Sasebo Naval District under instruction No. 967. Naval Reserve Captain Honma Naokichi is appointed CO.

20 November 1938:
Assigned to the 5th Gunboat Division under instruction No. 970.

30 November 1938:
Departs Sasebo.

E 2 December 1938:
Arrives at Shanghai and tethers to No. 4 buoy.

3 December 1938:
Comes alongside auxiliary gunboat NANKAI MARU No. 1.

December 1938:
Departs Shanghai and arrives at Dairen, Manchuria (now Dalian, northern China).

15 December 1938:
Assigned to 3rd Fleet, 5th Gunboat Division, 1st Base Force.

24 December 1938:
Departs Dairen.

10 February 1939:
Arrives at Dairen. Departs later.

3 March 1939:
Arrives at Hagi Harbor, Yamaguchi Prefecture. Departs later that day.

8 March 1939:
Arrives at Hagi Harbor. Departs later that same day.

10 March 1939:
Arrives at Hagi Harbor. Departs later.

1 April 1939:
Arrives at Anqing, China. Departs later.

15 April 1939:
Naval Reserve Lt Hiroshi Maro is appointed CO.

23 April 1939:
Arrives at Wu Long Shan, China. Departs later.

23 April 1939:
Rated as auxiliary gunboat No. 53.

6 July 1939:
Anchored at Jiangyin, Yangtse River, China.

8 July 1939:
Departs Jiangyin.

22 July 1939:
Arrives at Nanking, China.

28 July 1939:
Departs Nanking. Arrives there later.

12 September 1939:
Departs Nanking.

September 1939:
Arrives at Jinkow.

27 September 1939:
Departs Jinkow.

5 October 1939:
Arrives at Jinkow.

6 October 1939:
Departs Jinkow.

15 November 1939:
Assigned to the 15th Gunboat Division under instruction No. 850.

17 December 1939:
Arrives at Nanking.

18 December 1939:
Comes alongside auxiliary destroyer tender NIPPONKAI (NIHONKAI) MARU.

20 December 1939:
Nanking. Tethers to Asahi pier.

21 December 1939:
Anchored in Nanking Harbor.

15 November 1940:
Attached to the Kure Naval District under Navy’s instruction No. 830. Assigned that same day to the 14th Gunboat Division by Navy’s instruction No. 837.

1 May 1941:
Her draft registration is changed.

22 August 1941:
Naval Reserve Lt Morita Chikatsu is appointed CO.

15 October 1941:
Assigned to Vice Admiral Makita Kakusaburo’s (38) Shanghai Special Base Force in Captain (later Rear Admiral) Ohashi Tatsuo’s (40) 14th Gunboat Division also consisting of auxiliary gunboats NISSHO MARU No. 2 and SHINKO MARU No. 1 GO, under Navy’s instruction No. 1250.

October 1941:
Rated as auxiliary gunboat No. 3 in the 14th Gunboat Division.

4 November 1941:
Operates in southern China waters.

8 November 1941:
Arrives at Wanshan, China.

1 December 1941:
Currently assigned to Shanghai Special Base Force, Patrol Corps, 14th Gunboat Division. Departs Shui Dong.

2 December 1941:
Arrives at Wanshan. Departs there and arrives at Humen, southern China later in the day.

3 December 1941:
Departs Humen and arrives at Huangpu later that day.

4 December 1941:
Loads boiler water.

5 December 1941:
Comes alongside and loads coal from auxiliary transport KASAGISAN MARU. Later that day comes alongside Army tanker TAKASAGO MARU and loads fresh food.

6 December 1941:
Departs Huangpu.

7 December 1941:
Arrives at Nan Peng (Lamock) Island. Departs later that day.

8 December 1941:
Currently assigned to Shanghai Special Base Force, 8th Warning Corps, 14th Gunboat Division under Navy’s telegram No. 153. On patrol duties about 100 nautical miles S of Hong Kong.

10 December 1941:
Arrives at Nan Peng Island.

11 December 1941:
Departs Nan Peng Island in convoy with Panamanian captured cargo ship ISLAS VISAYAS (later AMOY MARU).

13 December 1941:
Arrives at Jieshi Bay.

14 December 1941:
Departs Jieshi Bay with seven fishing boats escorting a captured ship.

15 December 1941:
Due to high waves, escort of British captured tug EDITH MOLLER (later AMOY MARU No. 4) is worsened.

16 December 1941:
Arrives at Humen. Comes alongside and loads fresh food from cargo ship SHINKO MARU. Later in the day, loads coal and repairs a hull leak.

17 December 1941:
Departs Humen.

19 December 1941:
Arrives at Wanshan.

20 December 1941:
Departs Wanshan escorting an unidentified convoy up to Hainan Strait and arrives at Canton (now Guangzhou) Bay. Departs there later in the day and arrives at Canton.

21 December 1941:
Departs Canton in convoy escorting seized Panamanian cargo ship FLORINHA (later HOKUREI MARU) and tug LINDINHA (later SANA MARU). The convoy arrives at Hainan Bay later that day.

22 December 1941:
Departs Hainan Bay and arrives at Haikow, Hainan Island later in the day. Hands over the two captured ships to the 15th Guard Unit.

23 December 1941:
Departs Haikow.

24 December 1941:
Arrives at Wanshan.

27 December 1941:
Departs Wanshan.

28 December 1941:
Arrives at Wanshan Jiapo. Departs there and arrives at Hong Kong later that day. Comes alongside and loads fresh food from auxiliary storeship AZUCHI MARU.

29 December 1941:
Comes alongside and loads coal from auxiliary transport KASAGISAN MARU.

31 December 1941:
Assigned to patrol duties under Navy’s instruction No. 79. Departs Hong Kong on patrol and arrives at Yan Gan Strait later in the day.

1 January 1942:
Departs Yan Gan Strait and arrives at Wanshan later that day. Departs there escorting an unidentified convoy up to Hainan Strait where at 1658, the escort is ended.

3 January 1942:
Sustains a temporary engine breakdown off Shang Chuan Island. Departs the area later that day.

4 January 1942:
Arrives at Hong Kong. Assigned that same day to Shanghai Naval District, 8th Warning Corps, 14th Gunboat Division under instruction No. 165.

7 January 1942:
Comes alongside Army tanker TAKASAGO MARU and loads fresh food.

9 January 1942:
Comes alongside Army tanker TAKASAGO MARU and loads fresh food. Embarks 51 troops and departs Hong Kong later that day.

15 January 1942:
Arrives at Wusong. Departs there and arrives at Shanghai. Tethers to Asahi pier and disembarks troops. Departs Shanghai and arrives at Jiangnan later in the day.

16 January 1942:
Loads fresh food. Unloads ammunition and enters Jiangnan shipyard drydock for maintenance and repairs.

21 January 1942:
Loads fresh food.

24 January 1942:
Repairs are completed. Undocked.

25 January 1942:
Loads fresh food.

30 January 1942:
Loads fresh food.

2 February 1942:
Loads fresh food.

3 February 1942:
Loads grain products and ammunition.

4 February 1942:
Loads fresh food and canteen goods.

9 February 1942:
Departs Jiangnan and arrives at Shanghai. Tethers to Navy pier and loads coal and fresh food. Departs Shanghai later that same day.

10 February 1942:
Arrives at Taichow Islands.

11 February 1942:
Departs Taichow Islands and arrives at Yuet Ching Bay later that day.

13 February 1942:
Departs Yuet Ching Bay and arrives in Qiqu Archipelago later that same day.

14 February 1942:
Comes alongside auxiliary storeship KOSOKU MARU No. 3 and loads fresh food.

15 February 1942:
Departs Qiqu Archipelago and arrives at Kanmen Harbor later that day.

16 February 1942:
Departs Kanmen and arrives at Shannan Strait later that same day.

18 February 1942:
Departs Shannan Strait and arrives at Yuet Ching Bay later in the day.

19 February 1942:
Departs Yuet Ching Bay and arrives at Ping Toushan later that day. At 1037, Special Naval Landing Force (SNLF) troops disembark.

20 February 1942:
Departs Ping Toushan and calls at Kanmen Harbor. Departs there and arrives at Songmen Jiao later that day.

21 February 1942:
Departs Songmen Jiao and calls at Taichow Island. Departs there and meets up with IJN shared tanker (B/C-AO) TAKATORI MARU No. 1 before arriving at Jiu Shan Islands later in the day.

22 February 1942:
Departs Jiu Shan Islands and arrives at Dinghai later that day.

23 February 1942:
Loads coal.

25 February 1942:
Departs Dinghai and calls at Taichow Islands. Comes alongside and loads boiler water from auxiliary storeship KOSOKU MARU No. 3. Departs Taichow Islands and arrives at Shannan Strait later in the day.

27 February 1942:
Departs Shannan Strait and arrives off Hengmen. Comes alongside and loads fresh food from auxiliary storeship KOSOKU MARU No. 3. Departs Hengmen area and arrives at Qiqu Archipelago later that same day.

28 February 1942:
Departs Qiqu Archipelago on patrol duties and arrives back at Qiqu Archipelago later in the day.

2 March 1942:
Departs Qiqu Archipelago and arrives at Heiniu Bay later that day.

3 March 1942:
Departs Heiniu Bay and arrives at Qiqu Archipelago later that same day.

4 March 1942:
Departs Qiqu Archipelago and arrives at Heiniu Bay later in the day.

5 March 1942:
Departs Heiniu Bay and arrives at Kanmen Harbor later that day.

6 March 1942:
Departs Heiniu Bay and arrives at Kanmen Harbor later that day.

7 March 1942:
Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21. Departs Kanmen Harbor and arrives at Yuet Ching Bay later that same day.

8 March 1942:
Departs Yuet Ching Bay and arrives at Yuet Ching later in the day. Provides assistance to troops for recovering an emergency landed aircraft.

9 March 1942:
Departs Yuet Ching and arrives at Xiao Men Shan. At 1400, disembarks SNLF troops. At 1800, embarks SNLF troops and departs Xiao Men Shan arriving at Yuet Ching Bay later that same day.

10 March 1942:
Departs Yuet Ching Bay and arrives at Qiqu Archipelago later in the day. Comes alongside and loads boiler water from IJN shared tanker (B/C-AO) TAKATORI MARU No. 1.

11 March 1942:
Departs Qiqu Archipelago. A 2cm wide hull crack is detected in the engine room boiler tubes. Calls at Songmen Island. Departs there and arrives at Taichow Islands later that day.

12 March 1942:
Leak has expanded to 8cm wide. Departs Taichow Islands

13 March 1942:
Arrives at Jiu Shan Archipelago. Leak has expanded to 12cm wide. Departs there and arrives at Bei Ting Island later that same day

14 March 1942:
Departs Bei Ting Island and arrives at Dinghai later in the day.

16 March 1942:
Released from 8th Warning Force under telegram No. 843.

17 March 1942:
Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21. Comes alongside and loads boiler water from IJA transport DAINICHI MARU.

18 March 1942:
Departs Dinghai and arrives at Wusong later that day.

19 March 1942:
Departs Wusong and arrives at Jiangnan later that same day.

20 March 1942:
Undergoes hull repairs at shipyard and loads fresh food.

24 March 1942:
Loads fresh food.

28 March 1942:
Loads canteen goods. Fitted with canvas on rear deck gun bandstand.

30 March 1942:
Loads fresh food.

1 April 1942:
Loads fresh food.

2 April 1942:
Loads grain products and boiler water.

4 April 1942:
Loads boiler water and canteen goods. Departs Jiangnan and arrives at Shanghai, tethering at Coal pier later that day.

5 April 1942:
Loads coal and fresh food. Departs Shanghai.

6 April 1942:
Arrives at Taichow Islands.

7 April 1942:
Departs Taichow Islands and arrives at Yuet Ching Bay later in the day.

8 April 1942:
Departs Yuet Ching Bay.

9 April 1942:
Arrives at Qiqu Archipelago.

10 April 1942:
Departs Qiqu Archipelago on patrol duties and arrives back ther later that same day. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

11 April 1942:
Departs Qiqu Archipelago.

12 April 1942:
Arrives at Yuet Ching Bay.

13 April 1942:
Departs Yuet Ching Bay.

14 April 1942:
Arrives at Qiqu Archipelago. Departs there and arrives at Taichow Islands later that day.

15 April 1942:
Departs Taichow Islands there and arrives at Dinghai later in the day.

16 April 1942:
Tethers to pier and loads coal.

17 April 1942:
Departs Dinghai and arrives at Taichow Islands later that day. Comes alongside and loads fresh food from auxiliary storeship KOSOKU MARU No. 3.

18 April 1942:
Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU. Departs Taichow Islands and arrives at Yuet Ching Bay later that day.

20 April 1942:
Departs Yuet Ching Bay and arrives at Shipu later that same day.

21 April 1942:
At 1335, disembarks SNLF troops for searching a crashed US aircraft. At 2045, embarks SNLF troops.

22 April 1942:
Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

23 April 1942:
Departs Shipu and arrives at Taichow Islands later that day. Loads coal and boiler water.

24 April 1942:
A 4cm wide hull crack is detected in the engine room boiler tubes. Departs Taichow Islands.

25 April 1942:
Arrives at Wusong.

26 April 1942:
Departs Wusong and arrives at Jiangnan. Tethers to buoy No. 3. Departs there and arrives at shore later that day.

26 April ~ 30 May 1942:
Undergoes hull repairs at Jiangnan shipyard.

28 April 1942:
Loads fresh food.

22 May 1942:
Loads grain products.

26 May 1942:
Assigned to 2nd Patrol Unit under Shanghai Naval District telegram No. 4.

31 May 1942:
Repairs are completed. Departs Jiangnan and arrives at Shanghai later in the day. Tethers to coal pier and loads coal and boiler water.

1 June 1942:
Assigned to China, Shanghai Naval District, 1st Raid Corps, 14th Gunboat Division. Departs Shanghai and arrives at Wusong later that day. Departs there escorting an unidentified convoy.

2 June 1942:
The convoy heading south is joined by destroyer TSUGA as additional escort up to the Yangtze estuary. Boards for inspection a fishing boat later in the day.

3 June 1942:
Detached from the convoy and arrives at Heiniu Bay later that day.

4 June 1942:
Departs Heiniu Bay and calls at Daiyu Bay. At 1215, disembarks SNLF troops. At 1540, embarks SNLF troops and departs there, arriving at Guantou later that day.

5 June 1942:
Departs Guantou and arrives off Sha Harbor later in the day.

6 June 1942:
Departs Sha Harbor, calls at Cao Shan; departs there and arrives at Yuet Ching Bay later that same day.

7 June 1942:
Comes alongside, delivers seized goods and loads coal from IJN shared tanker (B/C-AO) TAKATORI MARU No. 1.

8 June 1942:
Departs Yuet Ching Bay and arrives at Fuyao Island later in the day.

8 June 1942:
Departs Fuyao Island and arrives at Fu Ning Bay later that day.

9 June 1942:
At 0730, disembarks SNLF troops. At 1525, embarks SNLF troops.

10 June 1942:
Departs Fu Ning Bay and arrives at Northern Islands later that same day. At 0900, disembarks SNLF troops. They re-embark at 1555.

11 June 1942:
Departs Northern Islands. At 0700, inspects a junk. At 1520, tows a gunboat. At 1722, the towing ends. Arrives at Fuyao Island later in the day.

12 June 1942:
Comes alongside and loads boiler water from cargo ship KATSUYAMA MARU.

13 June 1942:
Departs Fuyao Island and arrives at Qiqu Archipelago.

14 June 1942:
At 1130, disembarks a two men minesweeping team. They re-embark at 1730. At 2030, mine threat is cleared. At 2055, minesweeping is ended.

15 June 1942:
At 0530, disembarks SNLF troops. They re-embark at 1040. Departs Qiqu Archipelago towing three landing craft. At 1800, ends the towing and arrives at Taichow Islands later in the day. Loads fresh food.

16 June 1942:
Comes alongside and loads coal and boiler water from IJN shared tanker (B/C-AO) TAKATORI MARU No. 1.

17 June 1942:
Departs Taichow Islands and arrives at Xiaomen Shan later that day. At 2110, searchlights are switched on. They are switched off at 2315.

18 June 1942:
Departs Xiaomen Shan and arrives at Nanji Shan later that day.

19 June 1942:
Departs Nanji Shan, calls at North Island and departs there later that same day.

20 June 1942:
Arrives at Shipu. Comes alongside and loads boiler water from lighter SUZUHEI MARU.

21 June 1942:
Loads fresh food.

22 June 1942:
Departs Shipu and arrives at Songmen Island later in the day.

23 June 1942:
Departs Songmen Island and arrives at Fuyao Island later that day.

24 June 1942:
Departs Fuyao Island and at 1600, starts escorting an unidentified convoy.

26 June 1942:
At 1215, auxiliary gunboat SHOSEI MARU relieves TOSHO MARU from the convoy’s escort. Arrives at Dinghai later that same day.

27 June 1942:
Loads fresh food, boiler water and coal.

28 June 1942:
Loads fresh food.

30 June 1942:
Departs Dinghai and arrives at Taichow Islands later that day.

1 July 1942:
Departs Taichow Islands and arrives back later that same day. Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU and lighters BANKI and HEISHICHI MARUs.

2 July 1942:
Departs Taichow Islands on junk inspection duties and arrives at Yuet Ching Bay later that day.

3 July 1942:
At 0740, disembarks minesweeper team. Minesweepers re-embark at 1140. Departs Yuet Ching Bay later in the day.

4 July 1942:
Arrives at Qiqu Archipelago. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

7 July 1942:
Departs Qiqu Archipelago and arrives at Fei Chong later that same day.

8 July 1942:
Departs Fei Chong and arrives at Qiqu Archipelago later in the day.

9 July 1942:
At 0745, disembarks minesweepers. They re-embark at 1255. Departs Qiqu Archipelago and arrives at Yuet Ching Bay later that day. At 2000, embarks IJA troops. At 2055, engages in minesweeping duties. At 2130, embarks minesweepers and at 2135, ends minesweeping.

10 July 1942:
Departs Qiqu Archipelago and arrives off Feiyun Jiang later that day.

11 July 1942:
At 0525, disembarks minesweepers.

12 July 1942:
Departs Feiyun Jiang waters and arrives at Heiniu Bay later that day. Comes alongside and loads fresh food from cargo ship BANSHU MARU No. 22.

14 July 1942:
Departs Heiniu Bay and arrives at Yuet Ching Bay later that same day. Comes alongside and loads boiler water from refrigerated cargo ship BANSHU MARU No. 22 after suffering minor collision that damages the front anchor support. At 1830, embarks minesweepers.

16 July 1942:
At 0700, disembarks minesweepers. At 1640, comes alongside and loads boiler water from IJN shared tanker (B/C-AO) TAKATORI MARU No. 1. At 1940, embarks minesweepers. At 2030, minesweeping is ended.

17 July 1942:
At 0310, disembarks minesweepers. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21. At 2215, embarks minesweepers.

18 July 1942:
At 0615, disembarks minesweepers.

22 July 1942:
At 1100, embarks minesweepers.

24 July 1942:
At 0915, disembarks minesweepers.

25 July 1942:
At 1900, embarks minesweepers.

26 July 1942:
Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU. Departs Yuet Ching Bay and arrives off Ao Jiang later that day.

27 July 1942:
At 0525, disembarks Army troops. At 1450, embarks Army troops.

28 July 1942:
Departs Ao Jiang waters and arrives at Yuet Ching Bay later that day. Loads boiler water.

29 July 1942:
At 0730, disembarks minesweepers. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21. At 1320, comes alongside and loads coal from IJN shared tanker (B/C-AO) TAKATORI MARU No. 1. At 1545, coal supply is ended. At 1800, embarks minesweepers.

1 August 1942:
Currently assigned to land troops during raid operations.

3 August 1942:
Departs Yuet Ching Bay. Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU. Searchlights are switched on. Arrives in Niubi Shan Waterways later that day.

4 August 1942:
Departs Niubi Shan Waterways and arrives at Dinghai later that same day tethering at coal pier. IJA transport KANAN MARU supplies 65 cans of fresh water.

5 August 1942:
Loads coal. Landing barge No. 77 supplies canteen goods.

7 August 1942:
Departs Dinghai and arrives at Kinmen Island later that day. At 2315, searchlights are switched on.

8 August 1942:
At 0100, searchlights are switched off. Loads fresh food twice that same day. At 2059, searchlights are switched on. At 2109, starts firing 8cm gun warning shots. At 2115, support fire is ended.

9 August 1942:
Departs Kinmen Island and arrives at She Yang later in the day.

11 August 1942:
Departs She Yang and arrives at Taichow Islands later that day.

12 August 1942:
Departs Taichow Islands and arrives at Yuet Ching Bay later that same day.

13 August 1942:
Comes alongside and loads fuel from auxiliary oiler KORYU (974 GRT) MARU.

14 August 1942:
Comes alongside and loads 150 coal bags and 73 fresh water cans from IJN shared tanker (B/C-AO) TAKATORI MARU No. 1.

15 August 1942:
Departs Yuet Ching Bay and arrives off Fei Yun Jiang later in the day. At 2030, searchlights are switched on and switched off at 2230.

16 August 1942:
Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU. Departs Fei Yun Jiang and arrives at Yuet Ching Bay later that day.

17 August 1942:
Departs Yuet Ching Bay and arrives at Qiqu Archipelago later in the day. At 0830, disembarks SNLF troops. They board the ship at 1145, again disembark at 1300, and re-embark at 1630.

18 August 1942:
Departs Qiqu Archipelago on junk inspection duties and arrives at Yuet Ching Bay later that day.

19 August 1942:
Departs Yuet Ching Bay on junk inspection duties and arrives at Kanmen Harbor later that same day.

20 August 1942:
Departs Kanmen Harbor and arrives at Yuet Ching Bay later in the day. Comes alongside and loads 75 water cans from lighter BANKI MARU.

21 August 1942:
Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

22 August 1942:
Departs Yuet Ching Bay and arrives at Chong Shanbei Waterways later that same day.

23 August 1942:
Departs Chong Shanbei Waterways and arrives at Yuet Ching Bay later that day. At 0715, disembarks SNLF troops. They re-embark at 1545, disembark again at 1615 and come aboard at 1850.

24 August 1942:
Departs Yuet Ching Bay on junk inspection duties and arrives at Dong Fan Shan later that same day.

25 August 1942:
Departs Dong Fan Shan and arrives at Huo Shan Archipelago later that in the day.

26 August 1942:
Departs Huo Shan Archipelago and arrives at Wusong later that day.

27 August 1942:
Departs Wusong and arrives at Shanghai later that same day. Tethers to buoy No. 4.

28 August 1942:
Departs Shanghai and arrives at Jiangnan later in the day. Tethers to buoy No. 2.

29 August 1942:
Loads canteen goods and undergoes maintenance to hull both sides and various repairs at Jiangnan shipyard.

1 September 1942:
Loads fresh food.

2 September 1942:
Repairs to davit and anchor support platform are completed.

3 September 1942:
Gangway repairs are completed.

4 September 1942:
Seawater pipe repair is completed. Loads fresh food.

5 September 1942:
Cabin ventilation tube repair is completed.

6 September 1942:
Loads fresh water.

7 September 1942:
Departs Jiangnan and arrives at Shanghai later in the day, tethering at Mitsui coal pier. Loads coal and grain products. Departs Shanghai and arrives at Tang Nao Shan later that same day.

8 September 1942:
Departs Tang Nao Shan.

9 September 1942:
Arrives at Dong Fan Shan. Departs there and arrives at Taichow Islands. Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU.

10 September 1942:
Departs Taichow Islands and arrives at Kinmen Island later that day. At 1010, disembarks SNLF troops. At 1635, embarks SNLF troops.

11 September 1942:
Departs Kinmen Island.

12 September 1942:
Arrives at Yuet Ching Bay.

14 September 1942:
Departs Yuet Ching Bay and arrives at Qiqu Archipelago later that day.

15 September 1942:
Departs Qiqu Archipelago and arrives at Heiniu Bay later that same day. That same day, a raid operation is scheduled under Shanghai Naval District telegram No. 43. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

16 September 1942:
Departs Heiniu Bay and arrives at Tongpan Shan. At 1000, SNLF troops start deployment. At 1240, they board the ship. Departs and arrives North Longshan. Later that day, another raid operation is scheduled under Shanghai Naval District telegram No. 43. At 1940, searchlights are switched on as and intimidation measure.

17 September 1942:
Departs Tongpan Shan and arrives at Qiqu Archipelago later that day.

18 September 1942:
Departs Qiqu Archipelago and arrives at Huo You Shan later that same day. At 0934, SNLF troops start deployment. At 1825, they board the ship.

19 September 1942:
At 0800, SNLF troops start deployment. Departs Huo You Shan and arrives at Po Shan later in the day. At 1415, SNLF troops board the ship. Departs Po Shan and arrives at Qiqu Archipelago later that same day.

20 September 1942:
Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU.

21 September 1942:
On junk inspection duties.

22 September 1942:
Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU. Departs Qiqu Archipelago and arrives at Kanmen Harbor later that same day. Fires 11 warning shots.

23 September 1942:
Departs Kanmen Harbor on junk inspection duties and arrives at Yuet Ching Bay later in the day.

25 September 1942:
Departs Yuet Ching Bay on junk inspection duties and arrives at Qiqu Archipelago later that day. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

26 September 1942:
Departs Qiqu Archipelago and arrives at Heiniu Bay later that same day.

28 September 1942:
Departs Heiniu Bay and arrives at North Longshan. At 1000, SNLF troops start deployment. At 1300, they board the ship. Departs North Longshan and arrives at Melon Island. At 1510, SNLF troops start deployment and re-embark at 1555. Departs Melon Island and arrives at Tongpan Shan later that same day. At 1815, SNLF troops start deployment. At 1925, searchlights are switched on as an intimidation measure. At 2015, SNLF troops board the ship. At 2100, searchlights are switched off but at 2130, switched on again. At 2200, they are finally switched off.

29 September 1942:
Departs Tongpan Shan and arrives at Dayu Shan later that day.

1 October 1942:
Departs Dayu Shan and arrives at Heiniu Bay later in the day.

2 October 1942:
Departs Heiniu Bay escorting IJA transport YASUJIMA MARU.

3 October 1942:
Ends escort and arrives at Dinghai.

4 October 1942:
Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU. Weighs anchor, tethers to pier alongside cargo ship HOKOKU MARU and loads boiler water.

5 October 1942:
Loads coal and boiler water from cargo ship HOKOKU MARU.

6 October 1942:
Departs Dinghai. Comes alongside and loads fresh food from auxiliary storeship KOSOKU MARU No. 3 and arrives off Jue Chi later in the day.

7 October 1942:
Departs Jue Chi and arrives at Shipu later that day.

9 October 1942:
Departs Shipu and calls at Heng Shan. Departs there and arrives at Jiu Shan Islands later that same day.

10 October 1942:
Departs Jiu Shan Islands and arrives at Taichow Islands later in the day.

11 October 1942:
Departs Taichow Islands and arrives at Qiqu Archipelago later that day.

12 October 1942:
Departs Qiqu Archipelago and arrives at Qili later that same day. At 2000, searchlights are switched on as an intimidation measure and at 2015, switched off.

14 October 1942:
Departs Qili and arrives at Yuet Ching Bay later in the day. Comes alongside and loads boiler water from IJA transport KANAN MARU.

15 October 1942:
Departs Yuet Ching Bay and arrives at Heiniu Bay later that day. Comes alongside and loads fresh food from refrigerated cargo ship BANSHU MARU No. 22.

18 October 1942:
Departs Heiniu Bay and arrives at Taichow Islands later that same day.

21 October 1942:
Departs Taichow Islands on junk inspection and ASW duties.

22 October 1942:
At 0835, meets up with sistership auxiliary gunboat DAIGEN MARU No. 7. At 1857, sustains a steering gear failure. At 1905, failure is repaired and ASW mission resumed.

23 October 1942:
Arrives at Qiqu Archipelago.

24 October 1942:
Departs Qiqu Archipelago and arrives at Taichow Islands later that same day.

25 October 1942:
Comes alongside and loads fresh food from refrigerated cargo ship BANSHU MARU No. 22.

26 October 1942:
Departs Taichow Islands and arrives at Shipu later that day.

27 October 1942:
Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU. Departs Shipu and arrives at Huo Shan Islands later in the day.

28 October 1942:
Departs Huo Shan Islands and arrives at Wusong. Departs later that day.

29 October 1942:
Arrives at Wusong and tethers to No. 3 buoy. Departs there and enters Jiangnan shipyard dock later in the day.

30 October 1942:
Loads fresh food.

2 November 1942:
Loads fresh food.

4 November 1942:
Loads fresh food.

6 November 1942:
Loads canteen goods and grain products.

9 November 1942:
Undocked. Tethers to buoy No. 2.

10 November 1942:
Loads fresh food. Departs Jiangnan and arrives at Shanghai later that day, tethering at Mitsui coal pier. Loads coal and boiler water.

11 November 1942:
Equipped with first aid material. Embarks rescue team. Departs Shanghai on rescue drill mission and arrives at Bell Buoy later that same day.

12 November 1942:
Departs Bell Buoy. End drill rescue mission and arrives at Wusong. Comes alongside and transfers rescue team and material to barge No. 623. Departs Wusong later that day.

13 November 1942:
Arrives at Shipu. Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU.

14 November 1942:
Departs Shipu and arrives at Taichow Islands later that day.

15 November 1942:
Departs Taichow Islands and arrives at Yuet Ching Bay later that same day.

17 November 1942:
Comes alongside and loads boiler water from IJA transport KANAN MARU.

18 November 1942:
Departs Yuet Ching Bay and arrives at Kanmen Harbor later in the day.

20 November 1942:
Departs Kanmen Harbor and arrives at Yuet Ching Bay later that day.

21 November 1942:
Comes alongside and loads fresh food from refrigerated cargo ship BANSHU MARU No. 22.

24 November 1942:
Departs Yuet Ching Bay on junk inspection duties and arrives at Taichow Islands later that same day.

25 November 1942:
Departs Taichow Islands and arrives at Shipu. Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU. Departs Shipu and arrives at Fu Du waterways later in the day.

26 November 1942:
Departs Fu Du waterways and arrives at Dinghai later that day.

27 November 1942:
Loads coal.

28 November 1942:
Tethers at rotating anchor.

29 November 1942:
Departs Dinghai and arrives at Shipu later that same day.

30 November 1942:
Departs Shipu on junk inspection duties and arrives at Taichow Islands later in the day.

1 December 1942:
Departs Taichow Islands and arrives at Yuet Ching Bay later that day.

2 December 1942:
Comes alongside and loads fresh food from refrigerated cargo ship BANSHU MARU No. 22.

4 December 1942:
Departs Yuet Ching Bay and arrives at Kanmen Port later that same day.

5 December 1942:
Departs Kanmen Port on junk inspection duties and arrives at Yuet Ching Bay later in the day.

7 December 1942:
Departs Yuet Ching Bay and arrives at Taichow Islands later that same day. Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU. Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU.

8 December 1942:
Departs Taichow Islands on combat drill mission and arrives at Shipu later that day.

9 December 1942:
Departs Shipu and arrives at Taichow Islands later that same day. At 1930, searchlights are switched on and at 1945, switched off.

10 December 1942:
Departs Taichow Islands on junk inspection duties and arrives back later in the day.

11 December 1942:
Departs Taichow Islands on junk inspection duties and arrives at Shipu later that day.

13 December 1942:
Departs Shipu and arrives at Fu Du Waterways later that same day later that day.

14 December 1942:
Comes alongside and loads fresh food from refrigerated cargo ship BANSHU MARU No. 22. Comes alongside and receives mail cargo from IJA transport KANAN MARU. Departs Fu Du Waterways and arrives at Dinghai later that same day.

15 December 1942:
Tethers to pier.

16 December 1942:
Tethers to rotating anchor and loads coal.

17 December 1942:
Departs Dinghai and arrives at Shinpu later in the day. Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU.

18 December 1942:
Departs Shinpu and arrives at Taichow Islands later that day.

20 December 1942:
Embarks 11 passengers.

22 December 1942:
Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU. Departs Taichow Islands on combat drill mission.

23 December 1942:
Arrives at Fuyao Island.

27 December 1942:
Departs Fuyao Island and arrives at Heiniu Bay later that same day.

28 December 1942:
Departs Heiniu Bay and arrives at Yuet Ching Bay later in the day.

29 December 1942:
Comes alongside and loads fresh food from refrigerated cargo ship BANSHU MARU No. 22.

31 December 1942:
Departs Yuet Ching Bay and arrives at Nantian Bay later that same day. At 1850, searchlights are switched on and at 1855, switched off.

1 January 1943:
At 0655, SNLF troops start deployment. At 0855 fires 8cm gun five shots. Departs Nantian Bay and arrives at Shipu later that day. At 1640, SNLF troops board the ship.

3 January 1943:
Comes alongside and loads fresh food from auxiliary storeship SUMIYOSHI MARU.

5 January 1943:
Departs Shipu and arrives at Fu Du waterways later that day.

6 January 1943:
Departs Fu Du waterways and arrives at Dinghai later that same day. Comes alongside and loads boiler water from lighter SUZUHYO MARU.

7 January 1943:
Tethers to pier and load coal.

8 January 1943:
Goes to rotating anchor. Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

9 January 1943:
Departs Dinghai and arrives at Shipu later that day.

11 January 1943:
Departs Shipu.

12 January 1943:
Arrives at Taichow Islands. Departs there and arrives at Kinmen Island later in the day.

13 January 1943:
Departs Kinmen Island and arrives at Nantian Bay. Departs there and arrives at Baidaimen. Fires 8cm gun 10 shots providing artillery support to a survey team. Departs Baidaimen later in the day and arrives at Wuzi Island.

14 January 1943:
Departs Wuzi Island and arrives at Jiantiao Jiang. Departs there and arrives at Shinpu later that same day.

15 January 1943:
Comes alongside auxiliary storeship BANSHU MARU No. 16 and loads fresh food.

16 January 1943:
Departs Shinpu on junk inspection duties and arrives at Taichow Islands later that day.

19 January 1943:
Comes alongside and loads boiler water from lighter SUZUHYO MARU.

20 January 1943:
Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

20 January 1943:
Departs Wusong and arrives at Jiangnan later that same day.

21 January 1943:
Departs Taichow Islands and arrives at Shipu later that day.

23 January 1943:
Departs Shipu and arrives at Fu Du Waterways later that same day.

24 January 1943:
Departs Fu Du Waterways and arrives at Dinghai later in the day.

25 January 1943:
Comes alongside auxiliary storeship BANSHU MARU No. 16 and loads fresh food.

25-26 January 1943:
Comes alongside and loads boiler water from auxiliary oiler KORYU (974 GRT) MARU.

26 January 1943:
Loads coal. Goes to rotating anchor.

27 January 1943:
Departs Dinghai and arrives at Shipu later in the day.

29 January 1943:
Comes alongside and loads canteen goods from lighter SUZUHYO MARU.

1 February 1943:
Comes alongside and loads fresh food from auxiliary storeship BANSHU MARU No. 21.

3 February 1943:
Departs Shipu and arrives at Shepan Yang later that day.

5 February 1943:
Departs Shepan Yang and arrives at Shipu later in the day.

6 February 1943:
Departs Shipu, comes alongside auxiliary storeship BANSHU MARU No. 16, loads fresh food and arrives at Dinghai later that day.

7 February 1943:
Departs Dinghai.

8 February 1943:
Arrives at Wusong. Departs there and arrives at Jingnian later same day.

9 February 1943:
Begins repairs at Jingnian Shipyard.

14 February 1943:
Loads grain products.

15 February 1943:
Unloads ammunition.

19 February 1943:
Unloads boilers for repairs.

3 March 1943:
Loads canteen goods.

10 March 1943:
Transfers canteen goods on gunboat No. 6.

15 March 1943:
Unloads ship’s boats for repairs.

20 March 1943:
Enters No. 3 drydock.

31 March 1943:
Undocked. Tethers to pier.

12 April 1943:
Supplied with fresh food.

1 June 1943:
Released from Shanghai Special Base Force, 8th Warning Corps under Shanghai Naval District telegram No. 28. Also released from the 14th Gunboat Division under Navy’s instruction No. 1087. Captain Morita is reassigned to the Kure Naval District Office. Removed from the Navy’s list under instruction No. 1088 and registered again as an auxiliary transport (Otsu) category attached to the Kure Naval District with Kure as homeport under instruction No. 1089. [2]

19 June 1943:
At 0730, departs Jiangnan for Wusong and there, joins convoy MO-901 also consisting of IJA transport JUNPO (ex-Chinese SHUN FOONG) MARU escorted by minelayer TAKASHIMA. The convoy sails at 8 knots.

21 June 1943:
At 0900 arrives off Tomie and later that day arrives at Sasebo. Departs later.

6 July 1943:
Kure. Begins conversion at Mizuno Zosensho K.K. shipyard.

7 August 1943:
Conversion is completed.

8 August 1943:
Departs Kure.

12 August 1943:
Arrives at Yokosuka.

13 August 1943:
Departs Yokosuka and arrives at Tokyo.

15 August 1943:
Departs Tokyo and arrives at Yokosuka.

16 August 1943:
Departs Yokosuka.

20 August 1943:
At 1000, arrives at Kushiro, Hokkaido.

21 August 1943:
At 1300, departs Kushiro.

24 August 1943:
Arrives at Musashi Wan (Bay), (now Zaliv’yeva), Paramushiro, Kuriles .

31 August 1943:
Departs Musashi Wan and arrives at Kataoka, Shimushu-To (now Zaliv Kozyrevskogo, Ostrov Shumushu), Kuriles.

5 September 1943:
Departs Kataoka in a convoy also consisting of IJN requisitioned cargo ship (B-AK) SHOZUI MARU and IJA transport TENRYO MARU escorted by destroyer NAMIKAZE.

7 September 1943:
Arrives at Matsuwa-To (now Ostrov Matua), Kuriles. Departs later that day.

11 September 1943:
Arrives at Otaru, Hokkaido.

12 September 1943:
Departs Otaru.

13 September 1943:
Arrives at Ominato, Aomori Prefecture.

20 September 1943:
Departs Ominato and arrives at Hakodate, Hokkaido later that same day.

22 September 1943:
Departs Ominato.

23 September 1943:
Arrives at Kushiro.

24 September 1943:
Departs Kushiro.

25 September 1943:
Arrives at Tennei , Etorofu (now Burevestnik, Iturup), Kuriles.

27 September 1943:
Departs Tennei.

29 September 1943:
Arrives at Musashi Wan.

12 October 1943:
Departs Musashi Wan.

13 October 1943:
Arrives at Kataoka.

14 October 1943:
At 1500, departs Kataoka in Ishi convoy also consisting of civilian passenger/cargo ship (C-APK) SANTO MARU and auxiliary transport SHOHO MARU escorted by destroyer NOKAZE.

19 October 1943:
Arrives at Otaru.

21 October 1943:
Departs Otaru.

22 October 1943:
Arrives at Ominato.

26 October 1943:
Departs Ominato.

27 October 1943:
Arrives at Otaru.

28 October 1943:
Departs Otaru in convoy also consisting of IJA transport KOKAI MARU, IJN requisitioned passenger/cargo ship (B-APK) KASADO MARU and civilian passenger/cargo ship SHINANO MARU escorted by kaibokan ISHIGAKI.

29 October 1943:
Detached from the convoy and arrives at Wakkanai, Hokkaido.

1 November 1943:
Departs Wakkanai.

5 November 1943:
Arrives at Matsuwa-To.

7 November 1943:
Departs Matsuwa-To.

9 November 1943:
Arrives at Kataoka Wan.

23 November 1943:
Departs Kataoka Wan.

24 November 1943:
Arrives at Matsuwa-To.

25 November 1943:
Departs Matsuwa-To.

27 November 1943:
Arrives at Tennei. Departs later in the day.

28 November 1943:
Arrives at Kushiro. Departs later.

2 December 1943:
Arrives at Ominato.

16 December 1943:
Departs Ominato.

3 January 1944:
Arrives at Matsuwa-To.

12 January 1944:
At 1630, departs Muroran in convoy No. 2113 also consisting of IJN requisitioned cargo ship (B-AK) AWA MARU and IJA transport SHINMEI MARU with unknown escort. The convoy sails at 8.5 knots.

18 January 1944:
Arrives at Yokohama.

11 February 1944:
Departs Yokohama.

29 February 1944:
Arrives at Yokohama.

2 March 1944:
Departs Yokohama.

E March 1944:
Arrives at Ominato.

27 May 1944:
Ourazaki, S of Kure. Departs from the ”P-Base”, on the NE tip of Kurahashi-Jima, for the Netherlands East Indies towing HA-58, a Type C Hei-gata midget submarine. The 46-ton midget is towed because it is too heavy to be handled by the ships' derricks.

2 June 1944:
Departs Mutsure-Jima towing HA-58.

3 June 1944:
Arrives at Kagoshima, Kyushu.

E 4 ~ 12 June 1944:
Calls at Koniya, Amami-Oshima ~ Sesoko-Jima ~ Naha, Okinawa and Ishigaki, Yaeyama Retto.

13 June 1944:
The pair arrives at Kirun, Formosa (now Keelung, Taiwan). Loads coal and boiler water.

15 June 1944:
The pair departs Kirun.

16 June 1944:
The pair arrives at Takao, Formosa (now Kaohsiung, Taiwan). Loads coal and farm implements.

18 June 1944:
The pair departs Takao in convoy TAMA-21 also consisting of auxiliary oiler SHIMPO MARU, IJN requisitioned passenger/cargo ship (B-APK) TAMA MARU, IJA transports OYO (ex-WOYO) and YAGI MARUs and one unidentified merchant ship escorted by destroyer KURETAKE, subchaser CH-19 and auxiliary subchaser CHa-94.

23 June 1944:
The pair arrives at Manila, Luzon. Discharges postal cargo.

Late June 1944:
Loads firearms and provisions and embarks passengers. HA-58 is taken to Cavite Navy Yard, operated by the IJN’s 103rd Repair and Construction Unit. The midget submarine enters dock and undergoes maintenance and repairs.

2 July 1944:
The pair departs Manila southward in H-31 convoy also consisting of auxiliary transport ASAHISAN MARU and IJA transports SHINKOKU (2743 GRT) and MINO MARUs escorted by subchasers CH-41 and CH-46 and patrol boat PB-104.

7 July 1944:
The convoy arrives at Isabela, Basilan Island, Philippines.

8 July 1944:
Departs Isabela for Bitung, Celebes (now Bitoeng, Sulawesi).

11 July 1944:
Arrives at Bitung.

13 July 1944:
At 0600, H-31 convoy departs Bitung with IJN requisitioned cargo ship (B-AK) SHINNO MARU as additional ship.

14 July 1944:
The convoy arrives at the northern entrance to Kau Bay, Halmahera, Moluccas.

TOSHO MARU’s captain is informed of mines laid nearby and has to stop. As the transport slows to anchor, HA-58 comes to the surface. A patrolling IJA aircraft spots HA-58, mistakes her for an enemy submarine and drops bombs. Luckily, HA-58 is only slightly damaged.

At 1330, the pair arrives at Malifu, Kau Bay, Moluccas.

15 July 1944:
Disembarks 28 passengers. Unloads weapons, torpedoes, ammunition, small type mines, MGs and provisions. Embarks 27 passengers.

26 July 1944:
At 0700, departs Kau in a convoy also consisting of IJA transport KANTO MARU and IJN requisitioned cargo ship (B-AK) KEMBU (TATEBE) MARU escorted by subchasers CH-9, CH-26, CH-34, CH-35 and auxiliary subchaser SHONAN MARU No. 17. At 1700, CH-35 is detached for Morotai.

1 August 1944:
At 1850, arrives at Ambon, Moluccas. Departs later for Kau.

6 August 1944:
At 1500, departs Kau in convoy also consisting of auxiliary transport SHOEI (1,986 GRT) MARU escorted by minesweeper W-5, auxiliary minesweepers Wa-3 and Wa-104 and auxiliary NITTO MARU No. 18. Arrives at Ambon later that day.

7 August 1944:
At 1300, departs Ambon escorted by subchaser CH-53.

14 August 1944:
At 1700, arrives at Macassar, Celebes (now Sulawesi).

19 August 1944:
At 0530, departs Macassar escorted by subchaser CH-53.

22 August 1944:
At 1100, arrives at Surabaya, Java. Departs later.

12 September 1944:
S of Celebes. LtCdr (later Cdr) Marshall H. Austin’s (USNA ’35) USS REDFIN (SS-272) fires three torpedoes at TOSHO MARU at 05-27S, 120-28E, but they all run under her. CH-53 counterattacks, but Austin successfully evades and escapes. Arrives at Boni Reef (now Gosong Boni), Celebes later.

15 September 1944:
Departs Boni Reef.

19 September 1944:
Arrives at Staring Bay, Celebes. Departs later that day escorted by subchaser CH-53.

20 September 1944:
At 0410, arrives at Ambon. Departs there and arrives at Staring Bay.

21 September 1944:
Departs Staring Bay.

23 September 1944:
Off Wowoni, Celebes. TOSHO MARU is bombed and sunk by USN land based aircraft at 04-23S, 122-43E with unknown casualties.

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


Authors' Notes :
[1] Often incorrectly referred as TOSHU MARU. Not to be confused with IJA transport No. 123 (1,224 GRT, ’18).

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

Thanks go to Gengoro S. Toda of Japan. Thanks also go to Erich Muehlthaler of Germany for info about HA-58.

Gilbert Casse, Bob Hackett and Peter Cundall

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