On 1 February 1965, the 1st Submarine was reorganized into the 1st Submarine Group, which was newly formed under the Self-Defense Fleet. From 8 June to 23 August of the same year, she deployed to Hawaii to participate in dispatch training with JDS Fuyushio. Along the way, on 15 July, a periscope broke in a collision with an uninhabited cargo ship in the waters south of Oahu.
The submarine was removed from the naval register on 20 March 1978.[3]
Citations
^World Ships Special Edition 66th Collection Maritime Self-Defense Force All Ship History. Gaijinsha. 2004.
^World Ships Special Edition Vol. 665: History of Maritime Self-Defense Force Submarines. Gaijinsha. 2006.
^Maritime Self-Defense Force News, Ships of the World, June 1971, No. 166. Gaijinsha. June 1971. p. 81.