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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)
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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)
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Gamma-Rapho Pool Interagences

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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)
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Gamma-Rapho Pool Interagences

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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)
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JAPAN - DECEMBER 01: Aiko, The Only Child Of Japan'S Imperial Heir Crown Prince Naruhito And His Wife, Masako, Will Turn Three-Year-Old In Tokyo, Japan On December 01, 2004 - Princess Aiko, center, climbs on a tree as her father Crown Prince Naruhito, left, and mother Crown Princess Masako laugh at the garden of their residence Togu Palace in Tokyo. (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)

JAPAN - DECEMBER 01: Aiko, The Only Child Of Japan'S Imperial Heir Crown Prince Naruhito And His Wife, Masako, Will Turn Three-Year-Old In Tokyo, Japan On December 01, 2004 - Princess Aiko, center, climbs on a tree as her father Crown Prince Naruhito, left, and mother Crown Princess Masako laugh at the garden of their residence Togu Palace in Tokyo. (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)
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