Japan's Crown Princess Masako (C), accompanied by Prince Akishino (2nd R) and Princess Kiko (R), sees off her husband Crown Prince Naruhito (L) as Naruhito leaves for Germany, at their residence at Togu Palace in Tokyo June 21, 2011.

Japan's Crown Prince Naruhito (L) talks to his wife Crown Princess Masako as he bids farewell to her before leaving for Germany at their residence at Togu Palace in Tokyo June 21, 2011. Crown Prince Naruhito will visit Germany from June 21 for a four-day visit for the 150th anniversary of the Japan-Germany amity treaty.

Japan's Prince Akishino (C) and his wife Princess Kiko (L) are given a tour of the new Japanese Garden by Jorge Warner (R), director of the Lankester Botanical Garden near Cartago, Costa Rica, January 27, 2011.

Japanese Prince and Princess Akishino visit the National Museum in San Jose, on January 25, 2011. Japanese Prince and Princess are in Costa Rica on a six days visit.

In this picture released by the Imperial Household Agency on January 1, 2011, Crown Princess Masako, Crown Prince Naruhito, Emperor Akihito, Empress Michiko, Prince Akishino, Prince Hisahito, Princess Kiko (L-R in front row) and Princess Mako, Aiko and Kako (L-R in back row) pose for the annual official photo session for the new year at the Imperial Palace in Tokyo in this December 14, 2010 picture.

Japan's Emperor Akihito (C) appears with Empress Michiko (R), Crown Prince Naruhito (L) and Crown Princess Masako to well-wishers gathered to celebrate the monarch's 77th birthday at the Imperial Palace in Tokyo December 23, 2010.

Prince Akishino (R) poses for a photo with his wife Princess Kiko (L) and their children, Princess Mako (2nd R) Princess Kako, (top) and Prince Hisahito in the Akasaka Imperial Palace compound in this handout photo taken in Tokyo November 7, 2010. Akishino, second son of Emperor Akihito, turned 45 on November 30. Picture taken November 7, 2010.

Japanese Prince Akishino (R), second son of Emperor Akihito, and his wife Princess Kiko attend a ceremony in Tokyo on Nov. 21, 2010, to commemorate the eighth anniversary of the death of Prince Takamado, a cousin of the emperor.

Prince Akishino and Princess Kiko visited the Mainichi's Osaka headquarters on Nov. 2 to inspect the editorial office and printing room of the "Tenji Mainichi" (Braille Mainichi), a weekly braille newspaper with a history of nearly 90 years.

Photo

Japanese Prince Hisahito (C) posing with family members, father Prince Akishino (R), mother Princess Kiko, sisters Princess Mako and Kako

for their family portrait at the imperial villa at Nasu in Tochigi prefecture, north of Tokyo. Hisahito celebrated his fourth birthday on September 6.

Prince Hisahito, August 17, 2010

Prince Hisahito and his parents prince Akishino and Princess kiko visit an animal exhibition at the national museum of nature and science in tokyo, japan 17.08.2010