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

IJN KORYU MARU:
Tabular Record of Movement
© 2010 Bob Hackett and Peter Cundall.

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.
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.
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.
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, KORYU, 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 USS SEALION (SS-315) torpedoes and sinks SETSUZAN MARU at 29-57N, 122-51E.
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.
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.
- Bob Hackett and Peter Cundall.

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