
The W1 class minesweeper was a class of minesweepers of the Imperial Japanese Navy (IJN), serving during the 1930s and World War II. 6 vessels were built in 1922–29 under the Eight-eight fleet plan. They have two sub-classes, this article handles them collectively.

The No.7-class minesweepers 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.

The No.13 class minesweeper was a class of minesweepers of the Imperial Japanese Navy (IJN), serving during the 1930s and World War II. 6 vessels were built in 1931-36 under the Maru 1 Keikaku. They have two sub classes, this article handles them collectively.

The No.19 class minesweeper was a class of minesweepers of the Imperial Japanese Navy (IJN), serving during World War II. 70 vessels were planned under the Maru 4 Programme, Maru Kyū Programme and Kai-Maru 5 Programme, however, only 17 vessels were completed.

Banshu Maru No. 52 was an auxiliary minesweeper of the Imperial Japanese Navy during World War II.

The Hashima-class cable layers were the only class of purpose-built cable layers of the Imperial Japanese Navy (IJN), serving during World War II. Four vessels were built in 1939–41 under the Maru 4 Programme.

The Hatsutaka-class minelayer was a class of minelayers of the Imperial Japanese Navy (IJN), serving during World War II. There were three sub-classes, as well.

I-121, laid down in 1924 as Submarine No. 48 and known as I-21 from November 1924 to June 1938, was an I-121-class submarine of the Imperial Japanese Navy that served during the Second Sino-Japanese War and World War II. During the latter conflict, she conducted operations in support of the Japanese invasion of Malaya, the Japanese invasion of the Philippines, the bombing of Darwin, the Battle of Midway, the Guadalcanal campaign, the Battle of the Eastern Solomons, and the New Guinea campaign. She surrendered at the end of the war in 1945 and was scuttled in 1946.

The I-121-class submarine was a class of minelayer submarine in the Imperial Japanese Navy (IJN), serving from the 1920s to the World War ii. The IJN classed it as a Kiraisen type submarine . The type name, was shortened from Kirai Fusetsu Sensuikan .

Magane Maru was an auxiliary minelayer, gunboat, and patrol boat of the Imperial Japanese Navy during World War II.

Nisshin (日進) was a seaplane tender (AV) of the Imperial Japanese Navy during World War II.

The Shirakumo-class destroyers was a class of two torpedo boat destroyers (TBDs) of the Imperial Japanese Navy, built in Britain in 1901-02.

Tama Maru was an auxiliary minesweeper of the Imperial Japanese Navy during World War II.

Tama Maru No. 3 was an auxiliary minesweeper of the Imperial Japanese Navy during World War II.

Tama Maru No. 5 was an auxiliary minesweeper of the Imperial Japanese Navy during World War II.

The No.7 minesweeper , also sometimes called W-7 was a No.7 class minesweeper for the Imperial Japanese Navy. It was laid down on 27 October 1937, and finished on 16 June 1938.

Wa-1 was the first No.1-class auxiliary minesweeper of the Imperial Japanese Navy during World War II.