From 1983 to 1996, she portrayed the nurse Shiho in Series 7–14 of the long-running prime-time series Ōoka Echizen[2] 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.
[3] Ritsuko also acts in two-hour mystery dramas, with roles in the Monday, Wednesday and Saturday prime-time slots.
Her product endorsements include advertisements for Calpis, House Foods, and Lake (Shinsei Financial Co., Ltd.).