4. Yu Darvish
Yu Darvish is another Japanese baseball professional player who is ranked at No.4 in the list of top 10 richest athletes of Japan with an estimated net worth of US $ 10 million.
He plays for the Texas Rangers in the MLB. Part of the Beijing Olympics and also the member of the national baseball team of Japan in the 2009 World Baseball Classic. The 29 years old right handed pitcher finished third in his first season of MLB and also finished second in the American League.