After maintaining Category 5 strength for 12 hours, Ioke weakened back to a Category 4 for the final time on August 30 while approaching Wake Island. Ioke passed almost directly over the island on early September 1 and continued tracking to the west-northwest while slowly weakening over gradually cooling waters. On September 3, under the influence of an approaching trough, the typhoon began to recurve to the northwest, then to the north and away from Japan, while weakening more rapidly. Ioke began to transition into an extratropical storm late on September 4 due to increased wind shear and rapidly cooling seas, and the JTWC issued its last advisory at 1200 UTC on September 5 after it was decided that Ioke had begun extratropical transition. The JMA followed suit early on September 7 after Ioke had become completely extratropical east of the Kamchatka Peninsula.