sentences:  At the time, she was one of only four large submarines left in the Japanese Navy, and her mission was to harass Allied lines of communications.Passing through the Inland Sea around minefields, "I-58" headed for the east coast of The Philippines intending to attack ships there.Passing east of Okinawa and spotting no ships, she cruised south arriving at the Guam-Leyte shipping lane on 27 July.