Japan's Emperor Akihito (C left ), Empress Michiko (C right) and Mary Chee Bee Kiang (C) are watching Singapore's President Tony Tan Keng Yam (L front) reviewing the guard of honor during the welcome ceremony at the Imperial Palace in Tokyo on November 30, 2016. President Tan is on a five-day state visit to Japan. / AFP / POOL / Kimimasa MAYAMA (Photo credit should read KIMIMASA MAYAMA/AFP/Getty Images)
Singapore's President Tony Tan Keng Yam (2nd-L) and his wife Mary Tan (L) are welcomed by Japanese Emperor Akihito (2nd-R) and Empress Michiko upon their arrival at the Imperial Palace in Tokyo on November 30, 2016. / AFP / POOL / Eugene Hoshiko (Photo credit should read EUGENE HOSHIKO/AFP/Getty Images)
Singapore's President Tony Tan Keng Yam (2nd L) and his wife Mary Chee Bee Kiang (L) listen to their national anthem with Japan's Emperor Akihito (3rd R front) and Empress Michiko (2nd R front) during the welcome ceremony at the Imperial Palace in Tokyo on November 30, 2016. President Tan is on a five-day state visit to Japan. / AFP / POOL / Kimimasa MAYAMA (Photo credit should read KIMIMASA MAYAMA/AFP/Getty Images)
Singapore's President Tony Tan Keng Yam (2nd L) and his wife Mary Tan (L) are welcomed by Japan's Emperor Akihito (C) and Empress Michiko upon their arrival for a state dinner at the Imperial Palace in Tokyo on November 30, 2016. / AFP / POOL / TORU HANAI (Photo credit should read TORU HANAI/AFP/Getty Images)
Singapore's President Tony Tan Keng Yam (2nd L) and his wife Mary Tan (L) are welcomed by Japan's Emperor Akihito (C) and Empress Michiko upon their arrival for a state dinner at the Imperial Palace in Tokyo on November 30, 2016. / AFP / POOL / TORU HANAI (Photo credit should read TORU HANAI/AFP/Getty Images)
