Yumiko Ōshima (大島弓子 Ōshima Yumiko, born August 31, 1947) is a Japanese manga artist and a member of Year 24 group.
She made her debut in 1968 with Paula's Tears in Weekly Margaret.
She received the 1973 Japan Cartoonists Association Award for excellence for Mimoza Yakata de Tsukamaete. She received the 1978 Kodansha Manga Award for shōjo for The Star of Cottonland, and the 2008 Tezuka Osamu Cultural Prize Short Story Award for "Cher Gou-Gou...mon petit chat, mon petit ami," a short story in the ongoing series Gū-gū datte Neko de aru. She is credited with popularizing the kemonomimi (catgirl) character type through her creation of Chibi-neko from The Star of Cottonland.
- Paula no Namida (ポーラの涙, "Paula's Tears"), 1968
- Tanjō (誕生), 1970–1971
- Sakura Jikan (桜時間, "Cherry Blossom Time"), 1972
- Mimoza-yakata de Tsukamaete (ミモザ館でつかまえて), 1973
- Joka e ("To Joker") (1973) - An allegorical love triangle involving a boy who is accidentally transformed into a girl
- Nazuna yo Nazuna (なずなよなずな), 1974
- Ichigo Monogatari (いちご物語, "Strawberry Story"), 1975
- Freud-shiki Ranmaru (F式蘭丸), 1975
- Shichigatsu Nanoka ni (七月七日に), 1976
- Banana Bread no Pudding (バナナブレッドのプディング), 1977–1978 - A story about a sensitive young woman, Ira Miura, who wishes to have a gay boyfriend
- The Star of Cottonland (綿の国星 Wata no Kuni Hoshi), 1978–1987 - A story about a kitten, Chibi-neko, who thinks she is a little girl
- Akasuika Kisuika (赤すいか黄すいか), 1979
- Kinpatsu no Sōgen (金髪の草原), 1983
- Mainichi ga Natsuyasumi (毎日が夏休み), 1989
- Koi wa Newton no Ringo (恋はニュートンのリンゴ), 1990
- Christmas no Kiseki (クリスマスの奇跡), 1995
- Gū-gū datte Neko de aru (グーグーだって猫である), 1996–ongoing