The Japanese destroyer was one of 21 s built for the

Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender ...

(IJN) in the late 1910s. After serving for 23 years and throughout the

Pacific War The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that was fought in Asia, the Pacific Ocean, the Indian Ocean, and Oceania. It was geographically the largest theater of the war, including the vast ...

, she was retired 12 October 1945 and scuttled as breakwater in

Fukui is a Japanese name meaning "fortunate" or sometimes "one who is from the Fukui prefecture". It may refer to: Places * Fukui Domain, a part of the Japanese han system during the Edo period * Fukui Prefecture, a prefecture of Japan located in ...

in 1946.

Design and description

The ''Momi'' class was designed with higher speed and better seakeeping than the preceding second-class destroyers. The ships had an

overall length The overall length (OAL) of an ammunition cartridge is a measurement from the base of the brass shell casing to the tip of the bullet, seated into the brass casing. Cartridge overall length, or "COL", is important to safe functioning of reloads in ...

of and were between perpendiculars. They had a

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially localized grou ...

of , and a mean draft of . The ''Momi''-class ships displaced at

standard load The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into wei ...

and at

deep load The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into wei ...

.Jentschura, Jung & Mickel, p. 137 ''Hasu'' was powered by two

Parsons Parsons may refer to: Places In the United States: * Parsons, Kansas, a city * Parsons, Missouri, an unincorporated community * Parsons, Tennessee, a city * Parsons, West Virginia, a town * Camp Parsons, a Boy Scout camp in the state of Washingto ...

geared

steam turbine A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884. Fabrication of a modern steam turbin ...

s, each driving one propeller shaft using steam provided by three Kampon

water-tube boiler A high pressure watertube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-gene ...

s. The turbines were designed to produce to give the ships a speed of . The ships carried a maximum of of

fuel oil Fuel oil is any of various fractions obtained from the distillation of petroleum (crude oil). Such oils include distillates (the lighter fractions) and residues (the heavier fractions). Fuel oils include heavy fuel oil, marine fuel oil (MFO), bun ...

which gave them a range of at . Their crew consisted of 110 officers and crewmen.Watts & Gordon, p. 260 The main armament of the ''Momi''-class ships consisted of three Type 3 guns in single mounts; one gun forward of the well deck, one between the two funnels, and the last gun atop the aft

superstructure A superstructure is an upward extension of an existing structure above a baseline. This term is applied to various kinds of physical structures such as buildings, bridges, or ships. Aboard ships and large boats On water craft, the superstruct ...

. The guns were numbered '1' to '3' from front to rear. The ships carried two above-water twin sets of

torpedo tube A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...

s; one mount was in the well deck between the forward superstructure and the bow gun and the other between the aft funnel and aft superstructure. In 1939–40, ''Hishi'' was converted into a patrol boat. Her torpedo tubes, minesweeping gear, and aft 12 cm gun were removed in exchange for two triple mounts for

license-built Licensed production is the production under license of technology developed elsewhere. The licensee provides the licensor of a specific product with legal production rights, technical information, process technology, and any other proprietary compo ...

Type 96 light AA guns and 60

depth charge A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive Shock factor, hydraulic shock. Most depth ...

s. In addition one boiler was removed, which reduced her speed to from . These changes made her top heavy and ballast had to be added which increased her displacement to .Hackett, Kingsepp & CundallGardiner & Gray, p. 244

Construction and career

''Hasu'', built at the Uraga Dock Company in Uraga, was launched on December 8, 1921, and completed on July 31, 1922. The ship served throughout the Sino-Japanese War and

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. It was officially retired on October 12, 1945, and was scuttled as a breakwater in

in 1946.

Notes

References

* * * * {{DEFAULTSORT:Hasu (1921) 1921 ships Ships built by Uraga Dock Company Momi-class destroyers Ships sunk by US aircraft Maritime incidents in March 1944 World War II shipwrecks in the Pacific Ocean