Ayaka Ōshima

Ayaka Ōshima (大島 綾華) is a Japanese women's professional shogi player ranked 2-dan.

Early life and becoming a women's shogi professional
Ōshima was born in Hiroshima, Japan on January 31, 2003. She learned how to play shogi from her father.

Ōshima entered the Japan Shogi Association's training group system under the guidance of shogi professional Nobuo Mori. She satisfied the criteria for the rank of women's professional 2-kyū upon obtaining promotion to Training Group B2. 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.

Women's shogi professional
In March 2024, Ōshima defeated Keika Kitamura in the finals of the 17th Women's Mynavi Open challenger tournament to earn the right to challenge Tomoka Nishiyama for the Jo-Ō title; 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.

Promotion history
Ōshima's promotion history is as follows:

Note: All ranks are women's professional ranks.
 * 2-kyū: May 1, 2021
 * 1-kyū: June 26, 2021
 * 1-dan: April 1, 2022
 * 2-dan: March 4, 2024

Titles and other championships
Ōshima has appeared in a women's professional shogi major title match once but has yet to win a major title.