Danish Crown Princess Mary (R) and Crown Prince Frederik (L) wave to the press from a cruise boat during their inspection to the 2020 Tokyo Olympic and Paralympic Games facilities planned sites in Tokyo on March 27, 2015. The Danish royal couple are on a three-day visit to Japan. AFP PHOTO / KAZUHIRO NOGI (Photo credit should read KAZUHIRO NOGI/AFP/Getty Images)

Danish Crown Princess Mary (R) and Crown Prince Frederik (L) wave to the press from a cruise boat during their inspection to the 2020 Tokyo Olympic and Paralympic Games facilities planned sites in Tokyo on March 27, 2015.  The Danish royal couple are on a three-day visit to Japan.  AFP PHOTO / KAZUHIRO NOGI        (Photo credit should read KAZUHIRO NOGI/AFP/Getty Images)