Sakio Chiba

 is a Japanese professional shogi player ranked 7-dan.
Early life.
Chiba was born on February 11, 1979, in Machida, Tokyo. He entered the Japan Shogi Association's apprentice school when he was a junior high school ninth-grade student in 1993 under the guidance of shogi professional at the rank of 6-kyū. He was promoted to 1-dan in 1995 and obtained full professional status and the rank of 4-dan in October 2000 after winning the 27th 3-dan league (April 2000September 2000).
Personal life.
Chiba's wife, Ryōko is a female shogi professional. The couple married in May 2003, and have two daughters.
Promotion history.
Chiba's promotion history is as follows: