12 (Japanese: 第十二號驅潜特務艇) was a No.1-class auxiliary submarine chaser of the Imperial Japanese Navy that served during World War II.

[2] On 1 June 1943, she was reassigned to the First Base Force, Eighth Fleet.

[2] On 17 August 1943, she was assigned to escort duty for 13 Daihatsu-class landing craft and 3 motor torpedo boats carrying 2 companies of army troops and a naval platoon tasked with establishing a barge depot and staging base at Horaniu on the northeast part of Vella Lavella in order to facilitate the evacuation of 9,000 troops from the island.

She was accompanied by subchaser Cha-5, two armored Daihatsus, another motor torpedo boat, and a Soukoutei-class armored boat with four destroyers (Sazanami, Hamakaze, Isokaze, and Shigure) commanded by Rear-Admiral Baron Matsuji Ijuin providing heavy cover.

[3][4] In the ensuing Battle off Horaniu, she was sunk along with Cha-5, two torpedo boats, and one Daihatsu by gunfire north of Vella Lavella.