No.1-class auxiliary minelayer
 The No.1 class auxiliary minelayer (第一号型敷設特務艇 Dai Ichi Gō-gata Fusetsu-Tokumutei) was a class of minelayers of the Imperial Japanese Navy (IJN) serving during World War II. They were built to supplement the timeworn Sokuten-class. 4 vessels were built in 1941–42 under the Maru Rin Programme (Ship # 257–260).