Ayaka Ōshima (大島 綾華, Ōshima Ayaka, born January 31, 2003) is a Japanese women's professional shogi player ranked 2-dan.
[2] Ōshima entered the Japan Shogi Association's training group system under the guidance of shogi professional Nobuo Mori [ja].
[2] She satisfied the criteria for the rank of women's professional 2-kyū upon obtaining promotion to Training Group B2.
[3] She petitioned the JSA to be allowed to become a women's professional, and the JSA announced that she would be awarded women's professional status and the rank of 2-kyū on April 30, 2021.
[2] In March 2024, Ōshima defeated Keika Kitamura in the finals of the 17th Women's Mynavi Open [ja] challenger tournament to earn the right to challenge Tomoka Nishiyama for the Jo-Ō title;[4] Oshima's first appearance in a major title match, however, was unsuccessful as she lost the best-of-five title match (April 2024 – May 2024) against Nishiyama 3 games to 0.