Aiko, Princess Toshi (敬宮愛子内親王, Toshi-no-miya Aiko Naishinnō; born 1 December 2001) is a member of the Imperial House of Japan. She is the only child of Emperor Naruhito and Empress Masako.
Following her birth, the ongoing Japanese imperial succession debate had resulted in some politicians holding a favorable view on rescinding agnatic primogeniture (male-only imperial succession) originally implemented in 1889 and retained by the Allies of World War II on the Constitution of Japan. However, once her uncle Crown Prince Fumihito had his son, Hisahito, in September 2006, Hisahito became second in the line of succession following his father. Aiko remains at present legally ineligible to inherit the throne and she cannot succeed her father, while debate about the possibility of having future empresses regnant continues.
