Harusaki's writing career spanned over five decades, during which she produced numerous novels, short stories, and essays. Her works often explored the human condition, delving into themes of love, family, and social change. One of her most notable novels, The River of Waterfalls (1982), is a poignant portrayal of a family's struggles during the post-war period. The book earned her critical acclaim and established her as a prominent voice in Japanese literature.