IJN Submarine HA-204:
Tabular Record of Movement

2006-2019 Bob Hackett & Sander Kingsepp
Revision 2

5 April 1945:
Sasebo Navy Yard. Laid down as the Sen-Taka Sho (High-speed Small Type) class Submarine No. 4914.

1 May 1945:
Renumbered HA-204 and provisionally attached to Sasebo Naval District.

15 May 1945:
Lt Shigemoto Shunichi (70)(former navigating officer of I-47) is appointed the Chief Equipping Officer (CEO).

1 June 1945:
Launched as HA-204.

25 June 1945:
Completed and commissioned in the IJN. Attached to Sasebo Naval District. Assigned to SubDiv 33 for working-up. Lt Shigemoto Shunichi is the Commanding Officer.

6 August 1945: The First Atomic Bombing of Japan:
HA-204 is en route to Kure for a hull refit. After 0815, off Etajima Island, the surfaced submarine and its bridge crew are exposed to radiation from the nuclear explosion over Hiroshima. Lt Shigemoto receives severe burns.

2 September 1945:
HA-204 is surrendered to the Allies at Sasebo.

29 October 1945:
Grounded in Aburatsu Bay off Miyazaki coast.

30 November 1945:
Removed from the Navy List.

August to October 1948:
Scrapped at the Nishimura Tekkosho ironworks plant.

Authors' Notes:
Special thanks for help in preparing this TROM go to Dr. Higuchi Tatsuhiro of Japan and the fellow submarine enthusiast Steven Eckhardt of Australia.

Bob Hackett and Sander Kingsepp.

Back to Submarine Page