Princess Aiko, the daughter and only child of Emperor Naruhito and Empress Masako, turned 21 on Dec. 1. She has been performing official duties as an adult member of the imperial family over the ...

(Imperial Household Agency of Japan via AP) Japanese Emperor Naruhito, third right, accompanied by Empress Masako, second right, their daughter Princess Aiko, right, Crown Prince Akishino, third left, ...

The royal was accompanied by his wife, Empress Masako, 61, and their daughter Princess Aiko, 23, as he waved from the ledge of the Imperial Palace at cheering well-wishers. He addressed the ...

Whenever Princess Aiko likes to share how she feels, happy or sad, a dog named Yuri has always been on her side for the past 12 years, just as a best friend would. Aiko, the only child of Emperor ...

The Imperial Household Agency announced that Princess Aiko, the only daughter of Emperor Naruhito and Empress Masako, ...

An Imperial Palace celebration for the seventh birthday of Japan's Princess Aiko has been canceled because the princess is sick, royal officials say. Japanese Crown Princess Masako and Princess ...

Emperor Naruhito on Sunday greeted thousands who gathered to celebrate his 65th birthday, joined by Empress Masako, their ...