Princess Aiko in the context of "Imperial Household Law"

Fumihito, Crown Prince Akishino (秋篠宮皇嗣文仁親王, Akishino-no-miya Kōshi Fumihito Shinnō; born 30 November 1965, Japanese: [ɸɯmiꜜçi̥to]) is the heir presumptive to the Japanese throne. He is the younger brother of Emperor Naruhito, and the younger son of Emperor Emeritus Akihito and Empress Emerita Michiko. Since his marriage in June 1990, he has had the title Prince Akishino (秋篠宮, Akishino-no-miya) and has headed the Akishino branch of the Imperial House of Japan.

Fumihito has a bachelor's degree in political science from Gakushuin University and a Doctor of Philosophy degree in ornithology from the Graduate University for Advanced Studies. In 1990, he married Kiko Kawashima, with whom he has three children: Mako, Kako, and Hisahito. In November 2020, Fumihito was officially declared the heir presumptive to the throne, during the Ceremony for Proclamation of Crown Prince (Rikkōshi-Senmei-no-gi) in Tokyo. Preceding his investiture as Crown Prince, the ongoing Japanese imperial succession debate had resulted in some politicians holding a favorable view on rescinding agnatic primogeniture, which was implemented in 1889 and reinforced on the constitution of Japan by the Allies after World War II. However, once Fumihito and Kiko had their son Hisahito in September 2006, he became next in the line of succession following his father. Fumihito's niece and Emperor Naruhito's only child, Princess Aiko, remains at present legally ineligible to inherit the throne, while debate about the possibility of having future empresses regnant continues.