Ōima Yoshitoki (大今 良時), born 15 March 1989, is a Japanese manga writer and artist. She is the author and illustrator of Koe no Katachi (聲の形) & Fumetsu no Anata e (不滅のあなたへ).

She is publicly and critically acclaimed. In 2015 she won the Tezuka Osamu Cultural Prize in the New Creator catagory for Koe No Katachi.