**Kazuko Yoshiyuki** (born 1935) is a Japanese actress known for her long and versatile film career.

Considered an important face of Japanese cinema, she has worked with prominent directors such as Nagisa Ōshima and Shōhei Imamura.

Her most famous international role is that of Seki in Ōshima's *In the Realm of the Senses* (Ai no Bōrei, 1978), in which she plays a woman caught up in a forbidden relationship. She also received praise for her performance in Imamura's *The Eel* (Unagi, 1997).

Yoshiyuki is known for her ability to embody strong, resilient, and deeply human female characters, often grappling with moral and social dilemmas. Her acting is characterized by subtle intensity and expressiveness.