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TOKYO, JAPAN - AUGUST 08: Pedestrians look at a monitor showing Japan's Emperor Akihito delivering a speech in a video message on August 8, 2016 in Tokyo, Japan. Japan's Emperor Akihito addressed to the nation in a rare video message on his worry that it may become difficult to carry out his duties as the symbol of the State considering his fitness level gradually declining on August 8, 2016. This will raise a debate in Japan as the current Japanese law states the Emperor serves until death. (Photo by Tomohiro Ohsumi/Getty Images)

TOKYO, JAPAN - AUGUST 08: Pedestrians look at a monitor showing Japan's Emperor Akihito delivering a speech in a video message on August 8, 2016 in Tokyo, Japan. Japan's Emperor Akihito addressed to the nation in a rare video message on his worry that it may become difficult to carry out his duties as the symbol of the State considering his fitness level gradually declining on August 8, 2016. This will raise a debate in Japan as the current Japanese law states the Emperor serves until death. (Photo by Tomohiro Ohsumi/Getty Images)