On 16 March 1968, she was reorganized into the 3rd Submarine under the 1st Submarine Group, and she was incorporated with Asashio.
Harushio participated in Hawaii dispatch training from June 20 to September 9, 1969.
On 9 September 1970, while she was participating in a Maritime Self-Defense Force exercise, Harushio collided with Ōi while diving west of Tsugaru Strait, damaging her periscope.
She participated in Hawaii dispatch training from September 15 to November 30, 1973. On October 16, the same year, the 3rd Submarine was reorganized into the 2nd Submarine Group, which was newly formed under the Self-Defense Fleet.[2]
On 1 March 1983, she became a ship under the direct control of the 2nd Submarine Group.
She was decommissioned on 30 March 1984 and dismantled at Tokai Dock in March 1985.
References
^Takao, Ishibashi (2002). 海上自衛隊全艦船 1952-2002 [All ships of the Japan Maritime Self-Defense Force 1952-2002] (in Japanese). Japan: 並木書房.
^海上自衛隊ニュース, 世界の艦船 [Japan Maritime Self-Defense Force News, Ships of the World] (in Japanese). Vol. 166. Japan: 海人社. June 1971. p. 81.