Unryu was the lead ship of a planned class of 16 carriers, of which only three were finished before the war ended. She was built at Yokosuka Naval Arsenal, launched on 25 September 1943 and commissioned on 6 August 1944. Fuel and aircrew shortages limited her use to Japanese waters. After trials in Tokyo Bay she moved to Kure and trained in the Inland Sea until December.
On 17 December 1944 she left Kure under Captain Konishi, escorted by the destroyers Shigure, Hinoki and Momi. On 19 December the submarine Redfish hit her with a torpedo under the bridge at 16:35, and another struck at 16:50 abreast the forward elevator and the aviation gasoline tanks. She was torpedoed and sunk in the East China Sea.
Sources: Wikipedia (ship articles), the Kure Maritime History Science Museum photograph records on Wikimedia Commons, and combinedfleet.com for the Chitose-class histories. No commanding-officer records were available for these ships.