Japanese destroyer Hishi (1921)

The Japanese destroyer Hishi (菱) was one of 21 Momi-class destroyers built for the Imperial Japanese Navy (IJN) in the late 1910s. She was converted into a patrol boat (Patrol Boat No. 37) in 1940 and spent the Pacific War on escort duties, mostly in Japanese waters. The ship was sunk off Borneo by USS Pope (DD-225) on 24 January 1942 and was struck from the naval list on 10 April 1942.

Design and description
The Momi class was designed with higher speed and better seakeeping than the preceding Enoki-class destroyer second-class destroyers. The ships had an overall length of 280 ft and were 275 ft between perpendiculars. They had a beam of 26 ft, and a mean draft of 8 ft. The Momi-class ships displaced 850 LT at standard load and 1020 LT at deep load. Hishi was powered by two Parsons geared steam turbines, each driving one propeller shaft using steam provided by three Kampon water-tube boilers. The turbines were designed to produce 21500 shp to give the ships a speed of 36 kn. The ships carried a maximum of 275 LT of fuel oil which gave them a range of 3000 nmi at 15 kn. Their crew consisted of 110 officers and crewmen.

The main armament of the Momi-class ships consisted of three 12 cm 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. The guns were numbered '1' to '3' from front to rear. The ships carried two above-water twin sets of 533 mm torpedo tubes; 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 25 mm Type 96 light AA guns and 60 depth charges. In addition one boiler was removed, which reduced her speed to 18 kn from 12000 shp. These changes made her top heavy and ballast had to be added which increased her displacement to 935 LT.

Construction and career
Hishi, built at the Uraga Dock Company in Uraga, was launched on 13 October 1920 and completed on 10 December 1920. From December 1939 to April 1940, she was converted into a patrol boat and was renamed Patrol Boat No. 37 on 1 April 1940. The ship was sunk off Borneo by USS Pope (DD-225) on 24 January 1942. She was officially struck from the IJN's naval list on 10 April 1942.