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Undated photo shows Prince Hiro (2nd from L), now Japanese Crown Prince Naruhito, with (from L) Crown Princess Michiko (the current empress), Prince Aya, Emperor Hirohito, Prince Hitachi's wife Princess Hanako, Empress Nagako, Prince Hitachi and Crown Prince Akihito (the current emperor) at the Imperial Palace in Tokyo. Crown Prince Naruhito is set to become emperor on May 1, 2019. (Kyodo via AP Images) ==Kyodo (KEYSTONE/AP KYDPL KYODO/KYODO)