Ayaka Ōshima

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. She petitioned the 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. Oshima's first appearance in a major title match, however, was unsuccessful as she lost the best-of-five title match (April 2024May 2024) against Nishiyama 3 games to 0.

Ōshima qualified for her second major title match in March 2026 when she defeated in the finals of the 37th challenger league; Ōshima, however, lost the 37th Women's Ōi Title Match (AprilMay 2026) to Women's Ōi Kana Fukuma 3 games to none.

Promotion history Ōshima's promotion history is as follows:

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

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