W-21 (W-19 class) scanned from Gakken, V. 45

IJN Minesweeper W-25:
Tabular Record of Movement

© 2009-2013 Bob Hackett and Peter Cundall

Revision 1

Laid down at the Kure Dock Yard.

Launched and numbered W-25.

30 April 1943:
Completed and registered in the IJN. Lt Oda Toshio is the Commanding Officer.

21 February 1944:
Tokyo Bay. W-25 and W-24 and auxiliary netlayer TAIKO MARU depart Yokohama for Saipan escorting convoy No. 4420 consisting of KUMANOSAN, KIMISHIMA and KOYO MARUs and two unidentified ships.

23 February 1944:
At 1226, LtCdr Raymond H. Bass' (USNA ’31) USS PLUNGER (SS-179) torpedoes KIMISHIMA MARU carrying fuel, weapons, ammunition and rations, at 30-11N, 140-49E. A 1445, she sinks taking down four crewmen and 10 troops. The escorts counter-attack and drop 45 DCs, but USS PLUNGER suffers only slight damage.

That same day, subchaser CH-42 joins the escort from Chichi-Jima, but at 2240, LtCdr (later Rear-Admiral) Charles O. Triebel's (USNA ’29) USS SNOOK (SS-279) torpedoes and sinks KOYO MARU with 20 passengers and 1,191 construction troops and loaded with 5,000-tons of food provisions and construction equipment at 28-49N, 141-13E. 34 crewmen and 1,046 troops are KIA. CH-42 rescues 142 survivors.

24 February 1944:
At 0900, KUMANOSAN MARU is hit in the stern by a dud torpedo fired by an unknown submarine. At 1800, the convoy arrives at Chichi-Jima.

22 May 1944:
W-25 Departs Tateyama with submarine chaser CH-17 apparently escorting convoy No.3523 possibly consisting of EDOGAWA, KYUSHU MARUs and tanker No.3998 and possibly others. At some point CH-17 is detached and returns to Tokyo Bay.

1 June 1944:
Arrives at Nagaura, near Yokohama.

8 June 1944:
Departs Nagaura.

10 June 1944:
Arrives at Nagaura, near Yokohama.

14 June 1944:
The "Yaei Maru" convoy consisting of YAEI, TATSUEI and KYUSHU MARUs and UNKAI MARU No.10 departs Chichi-Jima escorted by subchaser CH-16 auxiliary netlayer KOGI MARU and auxiliary minesweeper TOSHI MARU No. 5. Later that day W-25 departs Nagaura

15 June 1944:
At 0800, W-25 and torpedo boat CHIDORI join the escort.

16 June 1944:
In a raging storm, TATSUEI MARU, UNKAI MARU No. 10, KOGI MARU and CH-16 are separated from the convoy and steam together.

18 June 1944:
Arrives at Nagaura and Yokosuka, Tokyo Bay.

19 June 1944:
Departs Nagaura.

22 June 1944:
Arrives at Nagaura.

28 June 1944:
At 0600, W-25, departs Yokosuka for Chichi-Jima with subchasers CH-16 and CH-18, auxiliary minesweeper TOSHI MARU No. 5 and minelayer SARUSHIMA escorting convoy No. 3628 consisting of SHIMA, TATSUEI, SHOZUI, TAIKO and KAIKO MARUs and UNYO MARU No. 8.

2 July 1944:
Convoy No. 3628 arrives at Chichi-Jima and begins to unload.

4 July 1944:
Chichi-Jima. Carrier-based aircraft of Rear Admiral (later Admiral-Ret) Joseph J. Clark’s (USNA ’17) Task Group 38.1 and Rear Admiral (later Vice Admiral) Ralph E. Davison’s Task Group 38.4 planes attack convoy No. 3628. They sink the entire convoy except KAIKO MARU. W-25 goes down at 28-35N, 141-04E.

10 September 1944:
Removed from the Navy List.

Authors' Note:
Thanks go to Matthew Jones for help in identifying the CO and to Mr Gilbert Casse of France for general assistance.

Photo credit goes to Gakken via J. Ed Low.

-Bob Hackett and Peter Cundall.

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