Japan’s Emperor Akihito, with Empress Michiko, waves to well-wishers in the central Japanese prefecture of Mie on April 18. Emperor Akihito takes part in a series of rituals ahead of his abdication.

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Japan’s Emperor Akihito, with Empress Michiko, waves to well-wishers in the central Japanese prefecture of Mie on April 18. Emperor Akihito takes part in a series of rituals ahead of his abdication.