Prince Hisahito, the nephew of Emperor Naruhito who is second-in-line to the Chrysanthemum Throne, turned 18 on Friday, becoming the first male member of Japan's imperial family to reach adulthood in around 39 years following his father.The only son of Crown Prince Fumihito, 58, and Crown Princess Kiko, 57, Prince Hisahito joins a dwindling number of adult members of the imperial family, with the 1947 Imperial House Law limiting imperial heirs to males who have an emperor on their father's side and requiring female members to leave upon marriage to a commoner."I hope to learn more through e…READ FULL ARTICLE