Prince Hisahito of Akishino is the youngest child and only son of the Crown Prince and Crown Princess of Japan. He is the nephew of Emperor Naruhito and second in line to the throne after his father, Fumihito. Wikipedia
Born: 2006 (age 17 years), Aiiku Hospital, Tokyo, Japan
Great-grandparents: Hirohito, Empress Nagako, Hidesaburō Shōda, and more
Cousin: Aiko, Princess Toshi
Siblings: Princess Kako of Akishino and Mako Komuro
Grandparents: Michiko, Akihito, Tatsuhiko Kawashima, and more