Ioke began to fluctuate in intensity afterward; weakened back to a Category 4 while undergoing an eyewall replacement cycle, regaining Category 5 strength on August 26. Ioke held that intensity until crossing the International Date Line that evening (August 27 after the crossover), becoming Typhoon Ioke in the process. The storm weakened to Category 4 strength according to the JTWC, but by 2100 UTC on August 29, the JTWC advised that Ioke had regained Category 5 strength for the third time.