On 22 April 1943, the Navy General Staff decided a mass production of escort ships, because of the urgent need to protect the convoys which were under constant attack.
The plan was to build a basic escort ship of around 800 tons, with a simple design for easy construction.
The design work of the Type C ships started in March 1943, the same time as the Ukuru class.
The lead ship, No.1 (CD-1) was constructed at Mitsubishi Heavy Industries, laid down on 15 September 1943, and completed with No.3 (CD-3) on 29 February 1944.
However, by 1944 the advantage had passed to the US, and many Type C vessels became casualties as the Japanese merchant fleet was devastated by the American submarine offensive.