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TOKYO, JAPAN - NOVEMBER 4 : Japan's Princess Yuriko, on a wheelchair, the wife of late Prince Mikasa, uncle of the current Emperor Akihito, is seen after praying during the funeral of late Prince Mikasa at the Toshimagaoka cemetery in Tokyo, Japan, November 4, 2016. (Photo by Reuters / Toru Hanai / Pool/Anadolu Agency/Getty Images)

TOKYO, JAPAN - NOVEMBER 4 : Japan's Princess Yuriko, on a wheelchair, the wife of late Prince Mikasa, uncle of the current Emperor Akihito, is seen after praying during the funeral of late Prince Mikasa at the Toshimagaoka cemetery in Tokyo, Japan, November 4, 2016.  (Photo by Reuters / Toru Hanai / Pool/Anadolu Agency/Getty Images)

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TOKYO, JAPAN - NOVEMBER 4 : Princess Yuriko, wife of the late Prince Mikasa, attend the funeral of late Prince Mikasa, uncle of the current Emperor Akihito, at the Toshimagaoka graveyard in Tokyo, Japan, November 4, 2016. (Photo by Koji Sasahara / Pool/Anadolu Agency/Getty Images)

TOKYO, JAPAN - NOVEMBER 4 : Princess Yuriko, wife of the late Prince Mikasa, attend the funeral of late Prince Mikasa, uncle of the current Emperor Akihito, at the Toshimagaoka graveyard in Tokyo, Japan, November 4, 2016. (Photo by Koji Sasahara / Pool/Anadolu Agency/Getty Images)

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TOKYO, JAPAN - NOVEMBER 4 : Crown Prince Naruhito (C), Crown Princess Masako (L) and Princess Yuriko, wife of the late Prince Mikasa (R) attend the funeral of late Prince Mikasa, uncle of the current Emperor Akihito, at the Toshimagaoka graveyard in Tokyo, Japan, November 4, 2016. (Photo by Koji Sasahara / Pool/Anadolu Agency/Getty Images)

TOKYO, JAPAN - NOVEMBER 4 : Crown Prince Naruhito (C), Crown Princess Masako (L) and Princess Yuriko, wife of the late Prince Mikasa (R) attend the funeral of late Prince Mikasa, uncle of the current Emperor Akihito, at the Toshimagaoka graveyard in Tokyo, Japan, November 4, 2016. (Photo by Koji Sasahara / Pool/Anadolu Agency/Getty Images)