Changes

*The I-400 class(Sen Toku-class) submarines were the largest submarines in the world until construction of the Nuclear Ballistic Missile Submarines in the 1960s.

*The I-400 class(Sen Toku-class) submarines were the largest submarines in the world until construction of the Nuclear Ballistic Missile Submarines in the 1960s.

* Commissioned 8 January 1945.

* Commissioned 8 January 1945.

*Expended as a target ship, off Pearl Harbor, 31 May 1946.

*Expended as a target ship, off Pearl Harbor, 31 May 1946. Wreck found in March, 2005.

* The reason she was a target ship by the US Navy was to prevent her from falling into the hands of the Soviet Union before the Cold War.

* The reason she was a target ship by the US Navy was to prevent her from falling into the hands of the Soviet Union before the Cold War.