As an activist she has been known as feminist, but since 1980s' active on warfare around aged people and their families. She is the Representative Secretary General of a Japan-based NPO, Women's Association for the Better Aging Society (WABAS).
She was graduated at Faculty of Letters in Tokyo University in 1956. While she was officially at the seminar of Aesthetics and Art History, she studied journalism in the Institute of Newspaper Researches, an institute of the university. She worked for Jiji Press, Gakken and Canon respectively. Since 1971 she has been a freelance writer and critic, mainly concerning feminism, warfare and education.
She ran for the governor of Tokyo in 2004 as an independent candidate and lost.