Satoru Sakaguchi

Satoru Sakaguchi (阪口 悟) is a Japanese professional shogi player ranked 6-dan.

Promotion history
Sakaguchi's promotion history is as follows:
 * 6-kyū: 1991
 * 1-dan: 1996
 * 4-dan: October 1, 2004
 * 5-dan: December 8, 2009
 * 6-dan: July 19, 2018