JS Tsushima (MSO-302) was the second ship of the Yaeyama-class minesweepers of the Japanese Maritime Self-Defense Force.

Subsequently, in 1961, based on the MSA agreement, three LST-542 class tank landing ships (LST-1 class final type) retired by the U.S. Navy were donated and started operation as Osumi type transport ships.

For this reason, the design of the 1,500-ton type (45LST), which had been built for the district corps a little earlier, was expanded, and it was built as a 2,000-ton type transport ship for agile operation under the SDF fleet.

It was put into service, and was incorporated into the 2nd Mine Warfare Force as a ship under direct control and deployed in Yokosuka.

On March 23, the same year, the 51st Mine Warfare Force was newly formed under the 2nd Mine Warfare Force, and was incorporated with the second ship JS Yaeyama commissioned on the same day.