Designed for ease of production, the Matsu class was smaller, slower and more lightly armed than previous destroyers as the IJN intended them for second-line duties like escorting convoys, releasing the larger ships for missions with the fleet.[1] The ships measured 100 meters (328 ft 1 in) long overall, with a beam of 9.35 meters (30 ft 8 in) and a draft of 3.3 meters (10 ft 10 in).[2] Their crew numbered 210 officers and enlisted men.[3] They displaced 1,282 metric tons (1,262 long tons) at standard load and 1,554 metric tons (1,529 long tons) at deep load.[4] The ships had two Kampon geared steam turbines, each driving one propeller shaft using steam provided by two Kampon water-tube boilers. The turbines were rated at a total of 19,000 shaft horsepower (14,000 kW) for a speed of 27.8 knots (51.5 km/h; 32.0 mph). The Matsus had a range of 4,680 nautical miles (8,670 km; 5,390 mi) at 16 knots (30 km/h; 18 mph).[5]
Together with the destroyers Shigure and Hinoki, Momi was part of the escort for the aircraft carrier Unryū in mid-December. Because an American invasion fleet had been spotted approaching the Philippine Islands, Unryū was intended to deliver a squadron of 30 Ohkakamikaze planes to Manila. The task force sailed west through the Shimonoseki Straits on 17 December to avoid American submarines, then turned south. Two days later, the convoy encountered the submarine USS Redfish which sank Unryū.[10]Momi and Shigure picked up 146 survivors[9] between them while Hinoki unsuccessfully attempted sink the American submarine. Momi and Hinoki shaped course for Takao, Japanese Taiwan, later that day and Shigure remained behind to find the Redfish.[10] From there, they steamed to Manila, the Philippines, on 22–24 December and then to Cam Ranh Bay in occupied French Indochina and Cape St. Jacques on 25–28 December. From there the pair escorted the ex-Italian reefer shipIkutagawa Maru from Cape St. Jacques to Manila, arriving on 4 January 1945.[9][11]
The following day the trio attempted to leave Manila for Indochina despite the presence of a nearby Allied convoy headed towards Lingayen Gulf. The two destroyers were spotted by American aircraft as heading directly for their convoy, so the Ikutagawa Maru may have already separated herself from her escorts by this time, and the three ships comprising the convoy's escort attempted to intercept them.[9][12][11] The American destroyer USS Bennion led the two Australian ships, the frigateGascoyne and the sloopWarrego towards the Japanese ships. The destroyer's radar picked up the Japanese convoy at 15:48 at a range of 23,300 yd (21,300 m) and her lookouts spotted the ships two minutes later. Bennion then slowed to the frigate's best speed of 20 knots (37 km/h; 23 mph) to allow her to catch up. Not long afterwards, the Allied ships were spotted in their turn by the Japanese who promptly reversed course back towards Manila. They opened fire at a range of 18,700 yards (17,100 m) at 15:57 and began making a smoke screen. Bennion replied a minute later and Gascoyne opened fire at 16:03, but it fell about a nautical mile short of the Japanese ships. The American ship increased her speed at 16:11 in an attempt to close the range and opened fire again at 16:24 at 17,400 yards (15,900 m) distance. The range had decreased to 14,300 yards (13,100 m) by 16:36 and the ship's captain ordered rapid and continuous fire a minute later. The American destroyer reversed course at 16:40 when the ship's captain was informed that nearby American escort carriersTask Group 77.2 had launched an airstrike of 16 torpedo bombers and 19 fighters. By this time, Bennion was 30 nautical miles (56 km; 35 mi) from its convoy and had expended 349 five-inch rounds without scoring a single hit.[12]Momi was hit by a torpedo and blew up with the loss of all hands at 14°0′N120°20′E / 14.000°N 120.333°E / 14.000; 120.333. The ship was stricken from the navy list on 10 March.[9]
Jentschura, Hansgeorg; Jung, Dieter & Mickel, Peter (1977). Warships of the Imperial Japanese Navy, 1869–1945. Annapolis, Maryland: United States Naval Institute. ISBN0-87021-893-X.
O'Hara, Vincent P. (2007). The U.S. Navy Against the Axis: Surface Combat, 1941–1945. Annapolis, Maryland: Naval Institute Press. ISBN978-1-59114-650-6.
Stille, Mark (2013). Imperial Japanese Navy Destroyers 1919–45 (2): Asahio to Tachibana Classes. Botley, UK: Osprey Publishing. ISBN978-1-84908-987-6.
Sturton, Ian (1980). "Japan". In Chesneau, Roger (ed.). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN0-85177-146-7.