CH-18 was a of the Imperial Japanese Navy during World War II.
CH-18 was laid down by Nippon Kokan K. K. at their Tsurumi Shipyard in 1941, launched on 23 April 1941, and completed and commissioned on 31 July 1941. In May 1942, she participated in the Battle of Midway (Operation "MI") where she was assigned to Miyamoto Sadachika's 16th Minesweeper Unit (along with auxiliary minesweepers , , , ; submarine chasers , and ; cargo ships Meiyo Maru and ; and auxiliary ammunition ship ).
On 30 December 1944, she was attacked and sunk near Santiago Island, Luzon by 26 land-based aircraft of the United States Fifth Air Force consisting of B-25 Mitchell medium bombers, A-20 Havoc light bombers, and P-40 Warhawk fighters () while conducting escort duty.
CH-18 was struck from the Navy List on 10 March 1945.