TOKYO - NOVEMBER 18: (FILE PHOTO) In this handout photo from the Imperial Household Agency, Crown Prince Naruhito of Japan and his wife Crown Princess Masako pose with their daughter Princess Aiko prior to her 2nd birthday November 18, 2003 in Tokyo. Crown Prince Naruhito and Crown Princess Masako will mark their 11th wedding anniversary on June 9, 2004. (Photo by Imperial Household Agency/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)
This combo shows photos of Japanese Princess Aiko (L), daughter of Crown Prince Naruhito and Crown Princess Masako, plays the cello as her father Crown Prince Naruhito (R) plays the viola during a regular orchestra concert by the alumni of Gakushuin University in Tokyo on April 14, 2013. The event marked the first time the two played together in public. JAPAN OUT AFP PHOTO / JAPAN POOL via JIJI PRESS (Photo credit should read JAPAN POOL/AFP/Getty Images)
JAPAN - JANUARY 01: Japan'S Emperor Akihito, Empress Michiko And Royal Family Pose For New Year Photograph In Tokyo, Japan On January 01, 2006 - Japan's Emperor Akihito (2nd/R) and Empress Michiko (R) pose with members of their royal family for a New Year photograph at the Imperial Palace in Tokyo - Seated are Crown Prince Naruhito (2nd/L) and Crown Princess Masako, with their kneeling daughter Princess Aiko (C) - January 1, 2006 Tokyo Prince Akishino (C), his wife Princess Kiko (R) and their daughter Princess Mako (L) - Their younger daughter Princess Kako is seen kneeling in foreground/R - Picture taken December 16, 2005. (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)
