JDS ''Hayashio'' (SS-521) was the

lead boat The lead ship, name ship, or class leader is the first of a series or class of ships that are all constructed according to the same general design. The term is applicable to naval ships and large civilian vessels. Large ships are very complex ...

of the s. She was commissioned on 30 June 1962.

Construction and career

''Hayashio'' was

laid down Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one ...

Mitsubishi Heavy Industries is a Japanese Multinational corporation, multinational engineering, electrical equipment and electronics corporation headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group and its automobile division is the prede ...

Kobe Kobe ( ; , ), officially , is the capital city of Hyōgo Prefecture, Japan. With a population of around 1.5 million, Kobe is Japan's List of Japanese cities by population, seventh-largest city and the third-largest port city after Port of Toky ...

Shipyard on 6 June 1960 and launched on 31 July 1961. She was commissioned on 30 June 1962. On 1 August 1962, the 1st Submarine Corps was newly formed and incorporated under the Kure District Force. On 1 March 1963, the 1st Submarine was reorganized under the Self-Defense Fleet. From 2 June to 19 August 1964, she participated in

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

dispatch training with JDS Wakashio. On 1 February 1965, the 1st Submarine was reorganized into the 1st Submarine Group, which was newly formed under the Self-Defense Fleet. At around 6:40 pm on 20 May 1970, she came into contact with a large merchant ship during a dive training in a water area about 30 km east of

Tanegashima is one of the Ōsumi Islands belonging to Kagoshima Prefecture, Japan. The island, in area, is the second largest of the Ōsumi Islands, and has a population of 33,000 people. Access to the island is by ferry, or by air to New Tanegashima Airp ...

Kagoshima Prefecture is a Prefectures of Japan, prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,527,019 (1 February 2025) and has a geographic area of 9,187 Square kilometre, km2 (3,547 Square m ...

, and damaged her periscope. She was decommissioned on 25 July 1977 and dismantled at Furusawa Steel in Etajima-cho in November 1977.

Citations

External links

{{DEFAULTSORT:Hayashio (SS-521) 1961 ships Hayashio-class submarines Ships built by Mitsubishi Heavy Industries