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Japanese Crown Prince Naruhito (R), Princess Masako (L) share a light moment with their daughter Princess Aiko (C) upon their arrival at Nasushiobara Station, north of Tokyo, 17 August 2007. The royal family is off to spend their summer vacation at a highland imperial villa. AFP PHOTO/Toru YAMANAKA/POOL (Photo credit should read TORU YAMAKAKA/AFP/Getty Images)

Japanese Crown Prince Naruhito (R), Princess Masako (L) share a light moment with their daughter Princess Aiko (C) upon their arrival at Nasushiobara Station, north of Tokyo, 17 August 2007. The royal family is off to spend their summer vacation at a highland imperial villa.  AFP PHOTO/Toru YAMANAKA/POOL (Photo credit should read TORU YAMAKAKA/AFP/Getty Images)