IJN Submarine HA-101:
Tabular Record of Movement
© 2006-2015 Bob Hackett & Sander Kingsepp Revision 2
8 June 1944:
Tanagawa. Laid down at Kawasaki's Senshu
Works as a Sensuikan Yu Sho (Small Supply Submarine) No. 4601, (SS) Type.
22 August 1944:
Launched and numbered HA-101.
Transferred to Kobe Kawasaki Yard. 
31 August 1944:
Lt Kunihiro Nobuharu (68)(former navigating officer of
I-45) is appointed the Chief Equipping Officer.
22 November 1944:
Kobe. Completed and commissioned in the IJN.
Assigned to SubRon 11 for working up. Lt Kunihiro is the Commanding Officer.
Inland Sea. Works up in Iyo Nada Sea with HA-102 and
27 January 1945:
Reassigned to Rear Admiral Owada Noboru's (former CO
of YAMASHIRO) SubRon 7.
Early February 1945:
Transferred to Yokosuka for a series of exercises
20 Mar 1945:
SubRon 7 is disbanded. Reassigned to the
newly-established SubDiv 16 (supply) under Captain Imaizumi Yoshijiro (former CO
of NAKA). Lt Kurashina Yasusuke (68)(former CO of HA-109) is appointed the new
13 May 1945:
Off Iyo-Mishima Island, N of Shikoku. Participates in
deep-diving tests of an IJA YU-class submarine.
17 June 1945:
Departs Yokosuka for a supply run to Minami-Torishima
28 June 1944:
Arrives at Minami-Torishima, unloads her cargo, then
departs for Yokosuka.
7 July 1945:
Returns to Yokosuka. Starts a rebuild to enable her to
carry aviation fuel.
25 July 1945:
Lt Jinbo Masaharu (69)(former CO of HA-108) is
2 September 1945:
Yokosuka. HA-101 is surrendered to the Allies.
15 September 1945:
Removed from the Navy List.
Tokyo. Scrapped at the Uraga Dockyard. 
 HA-101 class boats (except those built by Mitsubishi)
were laid down and launched at Senshu yard (Tanagawa), but then transferred to
Kobe yard for completion.
 Sources are divided on the HA-101's fate. Some have her scuttled off
Shimizu in October 1945.
Special thanks for help in preparing this TROM go to Dr. Higuchi
Tatsuhiro of Japan.
– Bob Hackett and Sander Kingsepp.