Some words of caution from Hideki Matsui's father: His son will adjust to the big leagues, but it may take a little time.

News photoMasao Matsui, father of New York Yankees outfielder Hideki Matsui, runs a museum dedicated to his son's baseball career in Komatsu, Ishikawa Prefecture.

"Last season, he only hit about 10 or 12 homers by the end of June," Masao Matsui said. "Then he went on a tear in July and August. He likes the hot weather."