Mari Kotani (小谷 真理, Kotani Mari, born in Toyama Prefecture on July 11, 1958[1]) is a Japanese science fiction critic, best known as the author of Evangelion as the Immaculate Virgin (analysis of the anime serie Neon Genesis Evangelion), Tokyo: Magazine House, 1997 and of Joseijou muishiki: techno-gynesis josei SF-ron josetsu, Tokyo: Keiso shobo, 1994 (Techno-Gynesis: The Political Unconscious of Feminist Science Fiction), which won the 15th Nihon SF Taisho Award.
When her complaints were ignored, she sued the author of the entry (Hiroo Yamagata), the publisher and Shufu-no-Tomo-sha, the distributor of the book, for what she termed "textual harassment."
The Japan PEN Club established a Women Writer's Committee, with feminist critic Kazuko Saegusa as chair, and Kotani as sub-chair.
During this period, Kotani and Maki Honda's translation of Joanna Russ' How to Suppress Women's Writing received by major feminist critics in Japan including Chizuko Ueno, Fukuko Kobayashi, Yuko Matsumoto, and Kazuko Takemura.
In 2001 the defendants were ordered to pay Kotani 3,300,000 yen (roughly $27,500), and to publish an apology on the top page of their respective website.