W-7-class minesweeper

The No.7-class minesweepers (第七号型掃海艇,) were a class of minesweepers of the Imperial Japanese Navy (IJN), serving during the Second Sino-Japanese War and World War II. Six vessels were built in 1937–1939 under the Maru 3 Keikaku.

Background

 * Project number I4. Improved model of the No.13-class minesweeper. They were built to update timeworn No.7 class, No.9 class and No.11 class. Kampon deleted minelayer facility from them, because IJN hoped they act in Yangtze River. And they added to one 120 mm naval gun for engage with National Revolutionary Army. Therefore, the No.7 class had the silhouette which resembled the Chidori-class torpedo boat and Ōtori-class torpedo boats.