No.7 class minesweeper (1938) - AbsoluteAstronomy.com

The was a class of minesweepers of the Imperial Japanese Navy

Imperial Japanese Navy

The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

(IJN), serving during the Second Sino-Japanese War

Second Sino-Japanese War

The Second Sino-Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan. From 1937 to 1941, China fought Japan with some economic help from Germany , the Soviet Union and the United States...

and the World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. 6 vessels were built in 1937-39 under the Maru 3 Keikaku

3rd Naval Armaments Supplement Programme (Japan, 1937)

The otherwise known as the "Circle Three" Plan was the third of four expansion plans of the Imperial Japanese Navy between 1930 and the start of World War II.-Background:...

Background

Project number I4. Improved model of the No.13-class
No.13 class minesweeper
The was a class of minesweepers of the Imperial Japanese Navy , serving during 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.-Background:...

. 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
Yangtze River
The Yangtze, Yangzi or Cháng Jiāng is the longest river in Asia, and the third-longest in the world. It flows for from the glaciers on the Tibetan Plateau in Qinghai eastward across southwest, central and eastern China before emptying into the East China Sea at Shanghai. It is also one of the...

. And they added to 1 × 120 mm naval gun for engage with National Revolutionary Army
National Revolutionary Army
The National Revolutionary Army , pre-1928 sometimes shortened to 革命軍 or Revolutionary Army and between 1928-1947 as 國軍 or National Army was the Military Arm of the Kuomintang from 1925 until 1947, as well as the national army of the Republic of China during the KMT's period of party rule...

. Therefore, No.7-class had the silhouette which resembled torpedo boat Chidori-class
Chidori class torpedo boat
The was a Imperial Japanese Navy class of torpedo boats that served during the Second World War. They proved to have too much armament for the hull and capsized shortly after completion in heavy weather. The entire class had to be rebuilt before they became satisfactory sea-boats...

and Ōtori-class
Otori class torpedo boat
The were a class of eight 840 ton fast torpedo boats of the Imperial Japanese Navy.-Development:The eight ships were ordered in 1934 and were commissioned between 1936 and 1937...

well.

Ships in class

Ship #	Ship	Builder	Laid down	Launched	Completed	Fate
49	No.7	Tama Shipyard	27 October 1937	16 June 1938	15 December 1938	Sunk by HMS Storm HMS Storm (P233) HMS Storm was an S-class submarine of the Royal Navy, and part of the third group built of that class. She was built by Cammell Laird and launched on 18 May 1943. So far, she is the only RN ship to bear the name Storm.... off Port Blair Port Blair Port Blair is the largest town and a municipal council in Andaman district in the Andaman Islands and the capital of the Andaman and Nicobar Islands, a union territory of India... on 15 April 1944. Decommissioned on 10 June 1944.
50	No.8	Uraga Dock Company	11 December 1937	28 May 1938	15 February 1939	Scuttled by Royal Navy Royal Navy The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service... at Singapore Singapore Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the... on 10 July 1946. Decommissioned on 10 August 1946.
51	No.9	Maizuru Naval Arsenal	7 February 1938	10 September 1938	15 February 1939	Struck a naval mine and sunk at Ambon on 1 February 1942. Decommissioned on 10 April 1942.
52	No.10	Tōkyō Ishikawajima Shipyard	21 December 1937	22 September 1938	15 February 1939	Sunk by air raid off Vigan on 10 December 1941. Decommissioned on 15 March 1942.
53	No.11	Uraga Dock Company	30 May 1938	28 December 1938	15 July 1939	Sunk by air raid off Makassar Makassar Makassar, is the provincial capital of South Sulawesi, Indonesia, and the largest city on Sulawesi Island. From 1971 to 1999, the city was named Ujung Pandang, after a precolonial fort in the city, and the two names are often used interchangeably... on 28 March 1945. Decommissioned on 10 May 1945.
54	No.12	Tōkyō Ishikawajima Shipyard	28 May 1938	18 February 1939	15 August 1939	Sunk by USS Besugo USS Besugo (SS-321) USS Besugo , a Balao-class submarine, was a ship of the United States Navy named for the besugo, a fish of the porgie family.... off Flores Flores Flores is one of the Lesser Sunda Islands, an island arc with an estimated area of 14,300 km² extending east from the Java island of Indonesia. The population was 1.831.000 in the 2010 census and the largest town is Maumere. Flores is Portuguese for "flowers".Flores is located east of Sumbawa... 08°13′S 119°14′E on 6 April 1945. Decommissioned on 25 May 1945.

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