The Empress of Japan opted for the Imperial Chrysanthemum Tiara for the occasion, her first time ever wearing the diamond headpiece, pairing it with a sparkling white dress and a diamond necklace.

Japan's Princess Aiko, the only child of Emperor Naruhito and Empress Masako, on Sunday celebrated her coming of age at the Imperial Palace in central Tokyo after turning 20 on Wednesday.

Empress Masako's jewels at tonight's state banquet at Buckingham Palace did not disappoint. The Empress of Japan opted for the Imperial Chrysanthemum Tiara for the occasion, her first time ever ...