Yubari was sighted on 27 April 1944 off Palau by the USN submarine Bluegill on her first war patrol.[12] Bluegill fired six torpedoes, of which Yūbari managed to evade four, but two hit on her starboard side near her Number 1 boiler room. Soon afterwards, her Number 2 boiler room was also flooded. She attempted to get underway using only her middle shaft, but the attempt failed, as did an attempt by the accompanying destroyer Samidare to take her in tow. Yūbari sank almost 24 hours after being torpedoed, at position 05°20′N 132°16′E, with the loss of 19 crewmen