is a Japanese actress. From 1983 to 1996, she portrayed the nurse Shiho in Series 7–14 of the long-running prime-time series Ōoka Echizen[1] on the nationwide Tokyo Broadcasting System network. A frequent guest star in jidaigeki roles, she has seven appearances in Mito Kōmon to her credit. Contemporary roles include parts in a 2004 television series spinoff of Castle of Sand and the 1985 Star Tanjō.[2] Ritsuko also acts in two-hour mystery dramas, with roles in the Monday, Wednesday and Saturday prime-time slots.
Ritsuko has appeared in two films. She was in the 1994 Natsu no Niwa: The Friends, directed by Shinji Sōmai[3] and in the 2005 Semi Shigure, directed by Mitsuo Kurotsuchi.
Her product endorsements include advertisements for Calpis, House Foods, and Lake (Shinsei Financial Co., Ltd.).