Yōko Moriguchi (森口 瑤子, Moriguchi Yōko, August 5, 1966) is a Japanese actress from Katsushika City, Tokyo. Her former stage name is Yoko Nada (灘 陽子, Nada Yōko). She is represented by Shochiku Entertainment. Height 164 cm, blood type A. Her husband is the screenwriter Yuji Sakamoto (坂元 裕二).