Hokkai Maru (Japanese: 北海丸) was a rescue tug of the Imperial Japanese Army during World War II. She was the first of three ships of her class succeeding the of high-powered tugboats.
Hokkai Maru was laid down on 6 November 1941[1] by Osaka Iron Works Co., Ltd. (株式會社大阪鐵工所本社造船所) at the behest of the Ministry of the Army (陸軍省).[2] [3] She was launched on 18 February 1942 and completed on 10 August 1942.[1] She was made of steel and registered in Hiroshima.[2] She was fitted as a rescue tug.[1] On 12 November 1942, she was attacked and sunk by torpedoes fired from the American submarine off the coast of Vietnam, south of Cam Ranh Bay (11.3°N 111°W).[1] [4] She was struck from the Navy List on 12 November 1942.[1]