Japanese Emperor Akihito has celebrated his 80th birthday, waving to a huge crowd from a balcony at the Imperial Palace in Tokyo.
Japanese Emperor Celebrates 80th Birthday

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Japan's Emperor Akihito waves to well-wishers who gathered to celebrate his 80th birthday at the Imperial Palace in Tokyo, Dec. 23, 2013.

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Japan's Emperor Akihito, accompanied by his wife Empress Michiko, and their family members, wave at well-wishers as they appear on the balcony of the Imperial Palace in Tokyo, Japan, Dec. 23, 2013.

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Well-wishers cross a bridge outside the Imperial Palace as they make their way to celebrate Emperor Akihito's 80th birthday in Tokyo, Dec. 23, 2013.

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Japan's Crown Prince Naruhito, Emperor Akihito, Crown Princess Masako and Empress Michiko stand in front of well-wishers at the Imperial Palace in Tokyo, Dec. 23, 2013.