坊ノ岬沖海戦
After returning to Kure for further training, "I-58" was attached to the "Tatara" group, with "I-44", "I-47" and "I-56", formed to attack American shipping anchored off Okinawa as part of Operation Ten-Go. "I-58" was unable to penetrate the intense U.S. anti-submarine defences, and was forced to return to Kyushu on 10 April to recharge batteries. She made another attempt, but repeated attacks by enemy aircraft made any attack impossible. The submarine was ordered to an area between Okinawa and Guam on the 14th, but had no success. The operation was cancelled on the 17th, and "I-58" returned to Kure on the 30th.