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TOKYO, JAPAN - OCTOBER 22 : Japan's Emperor Naruhito attends a ceremony where he officially proclaims his enthronement to the world at the Imperial Palace in Tokyo, Japan, October 22, 2019. (Photo by Reuters/Issei Kato/Pool/Anadolu Agency via Getty Images)

TOKYO, JAPAN - OCTOBER 22 : Japan's Emperor Naruhito attends a ceremony where he officially proclaims his enthronement to the world at the Imperial Palace in Tokyo, Japan, October 22, 2019. (Photo by Reuters/Issei Kato/Pool/Anadolu Agency via Getty Images)

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TOKYO, JAPAN - OCTOBER 22 : Japan's Emperor Naruhito (C) leaves the state room (Matsu-no-Ma) at the end of the enthronement ceremony where emperor officially proclaims his enthronement to the world at the Imperial Palace in Tokyo, Japan, October 22, 2019. (Photo by Kazuhiro NOGI / POOL / AFP/Anadolu Agency via Getty Images)

TOKYO, JAPAN - OCTOBER 22 : Japan's Emperor Naruhito (C) leaves the state room (Matsu-no-Ma) at the end of the enthronement ceremony where emperor officially proclaims his enthronement to the world at the Imperial Palace in Tokyo, Japan, October 22, 2019. (Photo by Kazuhiro NOGI / POOL / AFP/Anadolu Agency via Getty Images)

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TOKYO, JAPAN - OCTOBER 22 : Emperor Naruhito (L) delivers his speech as Empress Masako (2nd L), Prime Minister Shinzo Abe (R) and other officials attend the enthronement ceremony where emperor officially proclaims his enthronement to the world at the Imperial Palace in Tokyo, Japan, October 22, 2019. (Photo by Kazuhiro NOGI / POOL / AFP/Anadolu Agency via Getty Images)

TOKYO, JAPAN - OCTOBER 22 : Emperor Naruhito (L) delivers his speech as Empress Masako (2nd L), Prime Minister Shinzo Abe (R) and other officials attend the enthronement ceremony where emperor officially proclaims his enthronement to the world at the Imperial Palace in Tokyo, Japan, October 22, 2019. (Photo by Kazuhiro NOGI / POOL / AFP/Anadolu Agency via Getty Images)