IJN Submarine HA-203:
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. 4913.

15 April 1945:
Lt Mayama Takanari (70)(former navigating officer of I-58) is appointed the Chief Equipping Officer (CEO).

1 May 1945:
Renumbered HA-203 and provisionally attached to Sasebo Naval District.

25 May 1945:
Launched as HA-203.

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

2 September 1945:
The HA-203 is surrendered at Sasebo.

2 November 1945:
Reassigned to Japanese Submarine Division Three under LtCdr (later Captain) Paul R. Schratz with HA-201, HA-202, HA-205 and HA-210.

30 November 1945:
Removed from the Navy List.

26 March 1946:
Washington, DC. At a Submarine Officer's Conference, attended by former ComSubPac Vice Admiral Charles A. Lockwood, it is decided to dispose of all remaining captured Japanese submarines by sinking.

1 April 1946: Operation "Road's End":
Goto Islands. Scuttled by the USN just beyond the 100-fathom line at 32-37N, 129-17E.

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.

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