, real name , is a Japanese columnist and editor born on January 1, 1960, in Mie Prefecture, Japan. He is credited as popularizing the term "otaku" in its modern colloquial usage (first used in Manga Burikko). After dropping out of Meiji University's Nakano Junior and Senior High Schools, he graduated from Wako University. Along with Yà «ichi Endà Â, he launched the Tokyo Otona Club in 1982.
He is most well known for his study of serial killer Tsutomu Miyazaki, , published in 1989.