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.
[1] Ishitaka's promotion history is as follows.
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.
[3] 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.
[4] This shogi-related article is a stub.