Sumie Ishitaka

Sumie Ishitaka (石高 澄恵 Ishitaka Sumie, née Sumie Yokoyama 横山由紀, born September 27, 1966) is a Japanese women's professional shogi player ranked 2-dan.

Promotion history
Ishitaka's promotion history is as follows.
 * Women's Professional Apprentice League: 1985
 * 3-kyū: March 1, 1987
 * 1-kyū: March 1, 1989
 * 1-dan: February 26, 1992
 * 2-dan: April 1, 2000

Note: All ranks are women's professional ranks.

Awards and honors
Ishitaka received the Japan Shogi Association's received the "25 Years Service Award" in recognition of being an active professional for twenty-five years in 2011.

Personal life
In April 2004, the JSA announced on it official website that Yokoyama had gotten married and had decided to complete professionally under her married name Ishitaka.