Kei Kusunoki (? ?, Kusunoki Kei, born March 24, 1966), real name Mayumi Ohashi (????, Ohashi Mayumi), is a Japanese manga artist best known for her horror and comedy manga series.
She debuted in 1982 in Ribon Original with Nanika ga Kanojo Tori Tsuita?.
Her twin-sister Kaoru Ohashi also works as a manga artist.