(TENNAN MARU in wartime)

Tabular Record of Movement

© 2016 Berend van der Wal, Gilbert Casse and Peter Cundall
Revision 3

E 1942:
Tokyo, laid down and built by Ishikawajima-Harima H.I. for Nippon Seitetsu K. K. as a 5.407-tons wartime K type ore carrier. While on the stocks converted to a tanker.

February 1943:
Completed and named TENNAN MARU.

29 March 1943:
Transfers from Tokyo to Yokosuka.

1 April 1943:
At 1057 departs Yokosuka escorted by minesweeper W-24 and at 1250, arrives at Yokohama. At 1527, departs Yokohama with SEITAI, TERUKUNI, KIYOTADA (SEICHU) and ZUIYO MARUs in convoy No. 7401 escorted by W-24 bound for Inland Sea ports.

2 April 1943:
At 1400, breaks down. Auxiliary patrol boat KAZUMI MARU escorts her into Ise Wan (Bay).

3 April 1943:
Arrives at Kure.

4 April 1943:
Departs Kure.

5 April 1943:
Arrives at Shimotsu and departs later that day.

6 April 1943:
Arrives at Kobe. Undergoes repairs.

22 April 1943:
Departs Kobe.

23 April 1943:
Arrives at Kure.

28 April 1943:
Departs Kure.

2 May 1943:
At 1300, departs Moji in convoy No. 157 also consisting of KOFUKU and TOFUKU MARUs and one unidentified merchant ship escorted by torpedo boat HAYABUSA.

6 May 1943:
At 1250, arrives at Takao. Transfers that same day to Mako.

8 May 1943:
Departs Mako.

16 May 1943:
Arrives at Tarakan.

21 May 1943:
Departs Tarakan.

25 May 1943:
At 2300, departs Cebu.

27 May 1943:
At 1000, due to arrive at Zamboanga.

1 June 1943:
Arrives at Tarakan.

6 June 1943:
Departs Tarakan.

8 June 1943:
Arrives at Balikpapan.

15 June 1943:
Departs Balikpapan.

17 June 1943:
Arrives at Tarakan.

23 June 1943:
Departs Tarakan.

25 June 1943:
Arrives at Balikpapan.

11 July 1943:
Departs Balikpapan.

13 July 1943:
Arrives at Tarakan.

22 July 1943:
At 0700, departs Tarakan with SHINYU MARU and four unidentified ships in the Rinsen convoy escorted by IJN second class destroyer FUYO.

27 July 1943:
At 1240, arrives at Palau.

30 July 1943:
Departs Palau as only ship in convoy No. 8301 escorted by subchaser CH-28. Sails at 10 knots.

4 August 1943:
Arrives at Truk.

14 August 1943:
At 1430, departs Truk with IJN auxiliary oilers KENYO, HOKUAN and SHINSHU MARUs in convoy No. 7144 escorted by destroyers TAMANAMI and MAIKAZE. The convoy sails at 10 knots.

19 August 1943:
At 0930, arrives at Palau.

20 August 1943:
Departs Palau in convoy No. 2508 also consisting of HOKUAN, KENYO and SHINSHU MARUs escorted by torpedo boat HAYABUSA. The convoy sails at 9.5 knots.

26 August 1943:
TENNAN MARU is detached from convoy and arrives at Tarakan.

5 September 1943:
Departs Tarakan.

7 September 1943:
Arrives at Balikpapan.

19 September 1943:
TENNAN MARU departs Balikpapan, possibly in convoy.

26 September 1943:
Arrives at Palau.

1 October 1943:
At 1530, departs Palau with IJN auxiliary transport CHOAN MARU No. 2 GO in convoy No. 8011 escorted by destroyer ASANAGI. The convoy sails at 9.5 knots.

6 October 1943:
At 1200, arrives at Truk.

9 October 1943:
At 1800, departs Truk with IJN auxiliary transport OKITSU MARU in convoy No. 1092 escorted by subchaser CH-30. The convoy sails at 9 knots.

13 October 1943:
Arrives at Rabaul.

20 October 1943:
At 1445, departs Rabaul via Palau for Moji with IJA transports JOHORE, KAZAN, HOZUKAWA, BUNZAN and KOSEI MARUs in convoy O-006 escorted by subchasers CH-24 and CH-22. The convoy sails at 8.5 knots.

22 October 1943:
At 2253, CH-22 opens fire on an enemy submarine spotted on the surface.

23 October 1943:
LtCdr (later Rear Admiral) John S. Coye's (USNA ’33) USS SILVERSIDES (SS-236) attacks the convoy. At 2245, Coye torpedoes and sinks TENNAN MARU. Five passengers and 42 crewmen are KIA. USS SILVERSIDES also torpedoes and damages JOHORE and KAZAN MARUs at 02-30N, 144-44E.

24 October 1943:
KAZAN MARU sinks as the result of her damage. Four guards and three crewmen are KIA. CH-24 attempts to scuttle immobilized JOHORE MARU, but fails. Later, USS SILVERSIDES finishes off JOHORE MARU by gunfire. 79 passengers and five crewmen are KIA.

Author’s notes:

Thanks go to Gengoro S. Toda of Japan.

- Berend van der Wal, Gilbert Casse and Peter Cundall.

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