Born in Kumamoto, 1959. Graduated from the College of Arts and Sciences of the University of Tokyo. Associate Professor, School of Global Japanese Studies, Meiji University. Critic. After working as an editor for Chikuma Shobo, she has occupied her current position since April, 2008. Specializes in Manga Bunka-ron (manga culture). She has delivered commentaries mainly on comics, women, and sexuality. Also she has been on selection committees of Kodansha Manga-sho and Tezuka Osamu Bunka-sho (Tezuka Cultural Award). Director of the Japan Society for Studies in Cartoons and Comics. Her written works include "Watashi no Ibasho wa Doko ni Aruno? - Shojo Manga ga Utsusu Kokoro no Katachi", "Kairaku Denryu", "Shojo Manga Damashii", "Aijo Hyoron", etc.