Born in Yokohama, the granddaughter of poet Kyoshi Takahama and the daughter of poet Toshio Takahama [ja], Inahata had been composing haiku since she was still a child.
[1][2] She studied at Kobayashi Seishin Women's College.
[2] In 1979 she succeeded her father as editor-in-chief of the literary magazine Hototogisu, and was editor of the newspaper The Asahi Shimbun.
[1][2] In 1987 she founded and was the first secretary of the Traditional Haiku Society [ja], later serving as its honorary president.
[3] Inahata died in Ashiya, Hyōgo Prefecture on 27 February 2022, at the age of 91.