Naruhito's childhood was reported to be happy, and he enjoyed such diverse hobbies as music, mountain climbing, and riding. He played with the children of the royal chamberlain, and he was a fan of the Yomiuri Giants in the Central League, his favorite player being No. 3-turned-team manager Shigeo Nagashima. One day, Naruhito found the remains of an ancient roadway on the palace grounds, sparking a lifelong fascination with the history of transportation, which would provide the subject of his bachelor's and master's degrees in history.[10] He later said, "I have had a keen interest in roads since childhood.