Ohara was born on November 13, 1946,[1] in Bunkyō, Tokyo to a family that sold Japanese confectionery in the Hongō area.

[4] Around this period Toei began producing "delinquent sensitivity films",[5] making most of Ohara's roles bar hostesses or prostitutes.

[7] However, in February 1972, when announcing Ohara's engagement with Tsunehiko Watase, Sports Nippon referred to her as a Toei actress, and Shigeru Okada, then president of Toei, told the press that the couple were "our company's leading stars" and that he looks forward to working with them in the future.

[12] Ohara had a ¥300,000,000 (equivalent to ¥354,269,663 in 2019) mansion built in Okamoto, Setagaya, in 1986, and began living there with her mother.

She had a possible reoccurrence of the syndrome in November 2008, when she fell at home, fracturing her right wrist and bruising her knee.

[13] The fall was possibly because of a loss of balance due to the syndrome;[15] specialists have said that recurrences of the disease are rare.

[17] On August 23, a farewell party was held by Mitsuko Mori, Fukuko Ishii, Ruriko Asaoka and others at Aoyama Funeral Home.