YUSOSEN!



(Oiler by Takeshi Yuki scanned from "Color Paintings of Japanese Warships")

IJN KORYU MARU:

Tabular Record of Movement

2010-2014 Bob Hackett and Peter Cundall.

Revision 2


E 1939:
Osaka. Laid down at Naniwa Dock Co. as an 974-ton type 1 TS coastal motor tanker.

June 1940:
Launched and named KORYU MARU.

17 February 1941:
Completed for owners Koa Kaiun K.K and registered in Tokyo.

19 February 1941:
Requisitioned by the IJN.

26 February 1941:
Departs Sasebo.

June 1941:
Arrives at Sasebo.

3 July 1941:
Departs Sasebo for the central China coast area.

23 July 1941:
Returns to Sasebo.

26 July 1941:
Departs Sasebo for the central China coast area.

8 September 1941:
Returns to Sasebo.

12 September 1941:
Departs Sasebo for the central China coast area.

23 September 1941:
Returns to Sasebo.

27 September 1941:
Departs Sasebo for the central China coast area.

7 October 1941:
Returns to Sasebo.

10 October 1941:
Departs Sasebo for the central China coast area.

15 October 1941:
Registered as an auxiliary transport ship (oil supply) in the Sasebo Naval District.

23 October 1941:
Returns to Sasebo.

25 October 1941:
Departs Sasebo for the central China coast area.

9 November 1941:
Returns to Sasebo.

12 November 1941:
Departs Sasebo for the central China coast area.

26 November 1941:
Returns to Sasebo.

28 November 1941:
Departs Sasebo for the central China coast area.

December 1941:
IJN Captain Mizuno Kokichi (37) is appointed Supervisor.

6 December 1941:
Arrives at Sasebo. Undergoes periodic maintenance.

8 December 1941:
Departs Sasebo for the Taichow Islands.

11 December 1941:
Replenishes auxiliary gunboat DAIGEN MARU No. 7 with fresh water. Departs Taichow Islands for Tinghai (now Zhoushan).

13 December 1941:
Replenishes auxiliary gunboat SHINKO MARU No. 1 Go with fresh water.

December 1941:
Departs Tinghai and arrives at Sasebo.

21 December 1941:
Departs Sasebo and arrives at Tinghai.

23 December 1941:
Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

December 1941:
Departs Tinghai and arrives at Lu Hu Shan.

28 December 1941:
Replenishes auxiliary gunboat HYAKUFUKU MARU. with fresh water. Departs Lu Hu Shan and arrives at the Taichow Islands.

7 January 1942:
Replenishes auxiliary gunboat DAIGEN MARU No. 7 with fresh water. Departs the Taichow Islands and arrives at Shihpu. Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

January 1942:
Departs Shihpu and arrives at Sasebo.

22 January 1942:
Departs Sasebo for Taichow Islands.

25 January 1942:
Replenishes auxiliary gunboat DAIGEN MARU No. 7 with fresh water.

26 January 1942:
Replenishes auxiliary auxiliary gunboat SHINKO MARU No. 1 Go with fresh water.

January 1942:
Departs the Taichow Islands for Heiniu Bay.

9 February 1942:
Replenishes auxiliary gunboat SHINKO MARU No. 1 Go with fresh water.

February 1942:
Departs Heiniu Bay for Ssuu Chiao Shan.

17 February 1942:
Replenishes auxiliary gunboat HYAKUFUKU MARU with 60-tons of fresh water.

February 1942:
Departs Ssu Chiao Shan. for the Taichow Islands.

27 February 1942:
Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

14 March 1942:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with fresh water and heavy oil. Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

March 1942:
Departs the Taichow Islands for Sasebo.

29 March 1942:
Departs Sasebo.

2 April 1942:
Arrives at the Taichow Islands. Replenishes auxiliary gunboat SHINKO MARU No. 1 Go with fresh water.

3 April 1942:
Departs the Taichow Islands.

5 April 1942:
Arrives at Shanghai.

8 April 1942:
Departs Shanghai.

10 April 1942:
Arrives at Sasebo.

13 April 1942:
Departs Sasebo for the Taichow Islands.

16 April 1942:
Refuels auxiliary auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil.

18 April 1942:
Replenishes auxiliary auxiliary gunboat TOSHU MARU with fresh water.

April 1942:
Arrives at the Taichow Islands.

20 April 1942:
Arrives at Shanghai.

22 April 1942:
Departs Shanghai.

30 April 1942:
Arrives at Osaka.

23 May 1942:
Departs Osaka.

25 May 1942:
Arrives at Sasebo.

27 May 1942:
Departs Sasebo.

29 May 1942:
Replenishes auxiliary auxiliary gunboat NISSHO MARU No. 12 with fresh water.

1 June 1942:
Arrives at Shanghai.

4 June 1942:
Arrives at Yueh Ching Bay, Chikow Sea.

7 June 1942:
Replenishes auxiliary auxiliary gunboat NISSHO MARU No. 12 with fresh water. Departs Yueh Ching Bay.

10 June 1942:
Arrives at Sasebo.

13 June 1942:
Departs Sasebo.

18 June 1942:
Arrives at Shanghai.

23 June 1942:
Departs Shanghai.

25 June 1942:
Arrives at Sasebo.

28 June 1942:
Departs Sasebo and arrives at the Taichow Islands.

July 1942:
An unknown officer is appointed Supervisor.

1 July 1942:
Replenishes auxiliary gunboat TOSHU MARU with fresh water.

3 July 1942:
Arrives at Shanghai.

7 July 1942:
Departs the Taichow Islands.

11 July 1942:
Arrives at Yueh Ching Bay.

14 July 1942:
Replenishes auxiliary gunboats TOSHU MARU and SHINKO MARU No. 1 Go with fresh water. Suffers minor collision with TOSHU MARU.

July 1942:
Departs Yueh Ching Bay.

16 July 1942:
Arrives at Shanghai.

20 July 1942:
Departs Shanghai. Arrives at Tinghai.

23 July 1942:
Departs Tinghai and later that day arrives at Yueh Ching Bay.

24 July 1942:
Replenishes auxiliary gunboats NISSHO MARU No. 12, DAIGEN and SHOSEI MARUs and SHINKO MARU No. 1 Go with fresh water.

July 1942:
Departs Yueh Ching Bay.

28 July 1942:
Arrives at Sasebo.

31 July 1942:
Departs Sasebo.

5 August 1942:
Arrives at Shanghai.

10 August 1942:
Departs Shanghai. Arrives at Yueh Ching Bay.

13 August 1942:
Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

8 August 1942:
Departs Yueh Ching Bay.

16 August 1942:
Arrives at Sasebo.

21 August 1942:
Departs Sasebo. Arrives at Shihpu.

25 August 1942:
Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

August 1942:
Departs Shihpu.

26 August 1942:
Arrives at Shanghai.

30 August 1942:
Departs Shanghai. Arrives at Tinghai.

1 September 1942:
Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

September 1942:
Departs Tinghai.

6 September 1942:
Arrives at Sasebo.

10 September 1942:
Departs Sasebo for Yueh Ching Bay.

14 September 1942:
Departs Yueh Ching Bay. Arrives at the Taichow Islands.

15 September 1942:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

September 1942:
Departs the Taichow Islands. Arrives at Shihpu.

17 September 1942:
Arrives at Shanghai.

21 September 1942:
Departs Shanghai. Arrives at the Chikow Sea.

22 September 1942:
Replenishes auxiliary gunboat TOSHU MARU with fresh water.

September 1942:
Departs the Chikow Sea.

26 September 1942:
Arrives at Sasebo.

14 October 1942:
Departs Sasebo for the Taichow Islands.

19 October 1942:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

October 1942:
Arrives at the Taichow Islands.

20 October 1942:
Arrives at Shanghai.

26 October 1942:
Departs Shanghai for Shihpu.

27 October 1942:
Replenishes auxiliary gunboats TOSHU MARU and DAIGEN MARU No. 7 with fresh water.

October 1942:
Departs Shihpu.

30 October 1942:
Arrives at Sasebo.

3 November 1942:
Departs Sasebo for the Taichow Islands.

6 November 1942:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go heavy oil and fresh water.

November 1942:
Departs the Taichow Islands.

9 November 1942:
Arrives at Shanghai.

13 November 1942:
Arrives at Shihpu.

14 November 1942:
Replenishes auxiliary gunboat NISSHO MARU No. 12 with fresh water.

11 November 1942:
Departs Shihpu.

19 November 1942:
Arrives at Sasebo.

24 November 1942:
Departs Sasebo.

29 November 1942:
Arrives at Shanghai.

4 December 1942:
Arrives at the Taichow Islands.

7 December 1942:
Replenishes auxiliary gunboat TOSHU MARU with fresh water.

December 1942:
Departs the Taichow Islands.

11 December 1942:
Arrives at Sasebo.

14 December 1942:
Departs Sasebo and arrives at Shihpu.

17 December 1942:
Replenishes auxiliary gunboat TOSHU MARU fresh water.

December 1942:
Departs Shihpu.

20 December 1942:
Arrives at Shanghai.

24 December 1942:
Departs Shanghai.

29 December 1942:
Arrives at Sasebo.

4 January 1943:
Departs Sasebo for the Taichow Islands.

8 January 1943:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

January 1943:
Departs the Taichow Islands.

9 January 1943:
Arrives at Shanghai.

12 January 1943:
Departs Shanghai.

14 January 1943:
Arrives at Sasebo.

16 January 1943:
Departs Sasebo.

19 January 1943:
Arrives at Shanghai.

24 January 1943:
Departs Shanghai for Tinghai.

25 January 1943:
Replenishes auxiliary gunboat TOSHU MARU with fresh water.

26 January 1943:
Departs Tinghai.

27 January 1943:
Arrives at Shanghai.

6 February 1943:
Arrives at Sasebo.

14 February 1943:
Arrives at Chinkai.

16 February 1943:
Departs Chinkai.

18 February 1943:
Arrives at Shanghai.

23 February 1943:
Departs Tinghai.

25 February 1943:
Departs Tinghai and arrives at the Taichow Islands. Refuels auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil.

February 1943:
Departs the Taichow Islands.

1 March 1943:
Arrives at Sasebo.

4 March 1943:
Departs Sasebo. Arrives at Tinghai.

8 March 1943:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

March 1943:
Departs Tinghai.

12 March 1943:
Departs Shanghai.

15 March 1943:
Arrives at Yueh Ching Bay.

17 March 1943:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

March 1943:
Departs Yueh Ching Bay.

20 March 1943:
Arrives at Sasebo.

23 March 1943:
Departs Sasebo.

24 March 1943:
Arrives at Tinghai.

25 March 1943:
Arrives at Yueh Ching Bay.

31 March 1943:
Arrives at Shanghai.

7 April 1943:
Departs Shanghai. Arrives at Tinghai.

9 April 1943:
Departs Tinghai.

10 April 1943:
Arrives at Yueh Ching Bay. Refuels auxiliary gunboat SHINKO MARU No.1 Go with heavy oil.

April 1943:
Departs Yueh Ching Bay.

14 April 1943:
Arrives at Shanghai.

10 May 1943:
Departs Shanghai.

17 May 1943:
Arrives at Mako.

21 May 1943:
Departs Mako.

26 May 1943:
Arrives at Shanghai.

30 May 1943:
Departs Shanghai.

3 June 1943:
Arrives at Mako.

6 June 1943:
Departs Mako.

12 June 1943:
Arrives at Shanghai.

16 June 1943:
Departs Shanghai.

21 June 1943:
Arrives at Mako.

26 June 1943:
Departs Mako.

30 June 1943:
Arrives at Shanghai.

9 July 1943:
Departs Shanghai.

15 July 1943:
Arrives at Sasebo.

18 July 1943:
Departs Sasebo and at 1300 joins convoy Shi-808 also consisting of NICHIMAN, DAIYA, KINRYO, HIDA, RIZAN, UGA and SHOKEI MARUs escorted by submarine chaser KAII (ex Chinese light cruiser HAI WEI).

20 July 1943:
At 1400 arrives at Chiku Chiao.

23 July 1943:
Arrives at Shanghai.

28 July 1943:
Departs Shanghai.

6 August 1943:
Arrives at Sasebo.

12 August 1943:
Departs Sasebo for the Taichow Islands.

16 August 1943:
Refuels and replenishes auxiliary gunboats DAIGEN MARU No. 7 and SHINKO MARU No.1 Go with heavy oil and fresh water.

8 August 1943:
Departs the Taichow Islands.

18 August 1943:
Arrives at Shanghai.

25 August 1943:
Departs Shanghai.

29 August 1943:
Arrives at Sasebo.

1 September 1943:
Departs Sasebo.

6 September 1943:
Arrives at Shanghai.

11 September 1943:
Departs Shanghai.

14 September 1943:
Arrives at Sasebo.

19 September 1943:
Departs Sasebo.

1 October 1943:
Arrives at Sasebo.

4 October 1943:
Departs Sasebo.

7 October 1943:
Arrives at Shanghai.

24 October 1943:
Departs Shanghai.

27 October 1943:
Arrives at Sasebo.

1 November 1943:
Departs Sasebo.

5 November 1943:
Arrives at Shanghai.

9 November 1943:
Departs Shanghai.

13 November 1943:
Arrives at Sasebo.

16 November 1943:
Departs Sasebo. Arrives at Ssu Chiao Shan.

21 November 1943:
Refuels and replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

November 1943:
Departs Ssu Chiao Shan.

23 November 1943:
Arrives at the Taichow Islands.

27 November 1943:
Departs the Taichow Islands.

28 November 1943:
Arrives at Shanghai.

December 1943:
Departs Shanghai. Arrives at the Taichow Islands.

19 December 1943:
Replenishes auxiliary gunboat SHINKO MARU No. 1 Go with heavy oil and fresh water.

December 1943:
Departs the Taichow Islands and arrives at Shanghai.

30 December 1943:
At 1520, KORYU, MARU departs Shanghai in convoy MO-006 consisting of NARUTO, WAZAN, NISSHO, MISHIMA and KAMIKAZE MARUs escorted by minesweeper W-15.

3 January 1944:
At 0855, arrives at Sasebo.

20 January 1944:
At 0500, departs Hakodate. At 1500, arrives at Ominato at 8 knots.[1]

2 April 1944:
Departs Kure in convoy TA-103 consisting of an unknown number of unidentified ships and escorts.

5 April 1944:
Arrives at Takao and later departs for Tarakan, Borneo.

3 July 1944:
At 1025, KORYU MARU departs Saei, Formosa in convoy No. 3311 consisting of CHOHAKUSAN, SETSUZAN, SHOZAN, DAIICHI, FUKUEI, KAIKO, NICHIZUI, PEKING, DAIKYU, YOKO and SHOHO MARUs and TOYO MARU No. 3 escorted by destroyer HASU and gunboat OKITSU.

4 July 1944:
At 0700, YOKO MARU is detached for Keelung. Later that day, SHOHO MARU develops engine trouble and falls behind.

6 July 1944:
At 0545, LtCdr (later Vice Admiral) Eli T. Reich's (USNA 35) USS SEALION (SS-315) torpedoes and sinks SETSUZAN MARU (ex-Norwegian HELIOS) at 29-57N, 122-51E. One crewman is KIA.

10 July 1944:
At 0130, anchors near Shanghai. KORYU MARU probably rejoins the convoy at this point.

11 July 1944:
At 0600, departs the anchorage.

19 July 1944:
At 1040, arrives at Seito (Tsingtao).

20 July 1944:
At 1000, departs Seito.

25 July 1944:
At 1700, arrives at Moji.

25 August 1944:
Departs Surabaya, Java in an unnumbered convoy consisting of tanker KORYU MARU and cargo ship TENCHO MARU escorted by minesweeper W-11. At 1800, anchors off Probolingga.

26 August 1944:
At 0100, departs Probolingga.

29 August 1944:
At 1835, arrives at Bima.

8 November 1944:
Arrives at Keelung. At 0952, departs Keelung in the Rinji Convoy consisting of tanker KORYU MARU and cargo ship HOKUYU MARU escorted by minesweeper W-102.

9 November 1944:
At 0700, KORYU MARU is detached for Mako and arrives there later that same day.

13 June 1945:
Shimonoseki Straits, off Hesaki lighthouse. Twenty-nine USAAF 20th Air Force B-29s heavy bombers mine the Straits. These, or mines laid previously by B-29s, sink KORYU MARU at 33-55N, 131-07E. 14 crewmen are KIA.

10 August 1945:
Removed from the Navy List.

1948:
The wreck is salved for scrap.

20 April 1948:
Work is completed.


Authors' Note:
[1] Identity uncertain- could be 1919 built 2170 ship of same name.

Thanks to Mr. Gilbert Casse of France.

- Bob Hackett and Peter Cundall.


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