[1][2] Hamashio was laid down at Kawasaki Heavy Industries Kobe Shipyard on 8 April 1982 and launched on 1 February 1984.

She was commissioned on 5 March 1985, into the 2nd Submarine Group in Yokosuka.

On 27 March 1985, she was transferred as the 2nd submarine with JDS Nadashio on the same day.

She participated in Hawaii dispatch training from 10 September to 11 December 1987.

Around 8:30 am on 7 April 1994, a fire broke out from the switchboard in the engine room during charging work at the Yokosuka base, one person was burned, and several people inhaled gas.