see more

TOKYO, JAPAN - DECEMBER 2: (EDITORIAL USE ONLY) In this photo released by the Imperial Household Agency, Crown Prince Naruhito (L), Crown Princess Masako (R) and their daughter Princess Aiko pose at their residence during a photo-shoot held on December 2, 2010 at the Togu Palace in Tokyo, Japan. Masako turns 47 on December 9, 2010. (Gamma/Imperial Household Agency) (Photo by KURITA KAKU/Gamma-Rapho via Getty Images)

TOKYO, JAPAN - DECEMBER 2: (EDITORIAL USE ONLY)  In this photo released by the Imperial Household Agency, Crown Prince Naruhito (L), Crown Princess Masako (R) and their daughter Princess Aiko pose at their residence during a photo-shoot held on December 2, 2010 at the Togu Palace in Tokyo, Japan. Masako turns 47 on December 9, 2010. (Gamma/Imperial Household Agency) (Photo by KURITA KAKU/Gamma-Rapho via Getty Images)

see more

JAPAN - NOVEMBER 30: Japan's Princess Aiko In Tokyo, Japan On November 30, 2005 -Japan's Princess Aiko (C) enjoys picking mandarin oranges with her parents Crown Prince Naruhito and Crown Princess Masako during a stroll through their Togu Palace residence garden in Tokyo in this picture released by the Imperial Household Agency on November 30, 2005 for distribution December 1, 2005. Aiko turned four on Thursday. Picture taken 24NOV05. FOR EDITORIAL USE ONLY , Imperial Household Agency/Handout/Gamma. (Photo by Pool Interagences/Gamma-Rapho via Getty Images)

JAPAN - NOVEMBER 30:  Japan's Princess Aiko In Tokyo, Japan On November 30, 2005 -Japan's Princess Aiko (C) enjoys picking mandarin oranges with her parents Crown Prince Naruhito and Crown Princess Masako during a stroll through their Togu Palace residence garden in Tokyo in this picture released by the Imperial Household Agency on November 30, 2005 for distribution December 1, 2005. Aiko turned four on Thursday. Picture taken 24NOV05. FOR EDITORIAL USE ONLY , Imperial Household Agency/Handout/Gamma.  (Photo by Pool Interagences/Gamma-Rapho via Getty Images)

see more

JAPAN - FEBRUARY 05: Crown Prince Naruhito'S One-Year Old Daughter, Princess Aiko, With Mother Crown Princess Masako, At Their Residence, Togu Palace In Tokyo, Japan On February 05, 2003 This palace hand out picture taken 05 February 2003 shows Japanese Princess Aiko, Crown Prince Naruhito's one-year-old daughter, playing around her mother, Crown Princess Masako (R) at their residence, the Togu Palace in Tokyo - The Imperial Household Agency released this picture 14 February 2003. (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)

JAPAN - FEBRUARY 05:  Crown Prince Naruhito'S One-Year Old Daughter, Princess Aiko, With Mother Crown Princess Masako, At Their Residence, Togu Palace In Tokyo, Japan On February 05, 2003 This palace hand out picture taken 05 February 2003 shows Japanese Princess Aiko, Crown Prince Naruhito's one-year-old daughter, playing around her mother, Crown Princess Masako (R) at their residence, the Togu Palace in Tokyo - The Imperial Household Agency released this picture 14 February 2003.  (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)

see more

JAPAN - NOVEMBER 30: Japan's Princess Aiko In Tokyo, Japan On November 30, 2005 -Japan's Princess Aiko (C) enjoys picking mandarin oranges with her parents Crown Prince Naruhito and Crown Princess Masako during a stroll through their Togu Palace residence garden in Tokyo in this picture released by the Imperial Household Agency on November 30, 2005 for distribution December 1, 2005. Aiko turned four on Thursday. Picture taken 24NOV05. FOR EDITORIAL USE ONLY , Imperial Household Agency/Handout/Gamma. (Photo by Pool Interagences/Gamma-Rapho via Getty Images)

JAPAN - NOVEMBER 30:  Japan's Princess Aiko In Tokyo, Japan On November 30, 2005 -Japan's Princess Aiko (C) enjoys picking mandarin oranges with her parents Crown Prince Naruhito and Crown Princess Masako during a stroll through their Togu Palace residence garden in Tokyo in this picture released by the Imperial Household Agency on November 30, 2005 for distribution December 1, 2005. Aiko turned four on Thursday. Picture taken 24NOV05. FOR EDITORIAL USE ONLY , Imperial Household Agency/Handout/Gamma.  (Photo by Pool Interagences/Gamma-Rapho via Getty Images)

see more

401545 01: Japans Crown Prince Naruhito smiles at his baby daughter Princess Aiko, held in the arms of Crown Princess Masako at their Togu Palace residence February 7, 2002 in Tokyo. (Photo by Imperial House Hold Agency/Getty Images)

401545 01: Japans Crown Prince Naruhito smiles at his baby daughter Princess Aiko, held in the arms of Crown Princess Masako at their Togu Palace residence February 7, 2002 in Tokyo. (Photo by Imperial House Hold Agency/Getty Images)