[1] Iwahashi's career began when she gained attention for her writing while attending Ochanomizu Women's College.

Her short story "Gyakukoosen" was one of these early works.

[3] It was adapted into a movie by the Nikkatsu film studio.

[2] Iwahashi graduated in 1957 with a degree in pedagogical sociology.

The same year, she was employed as a special feature writer for a magazine.