Yoshiko Sai (born June 22nd 1953) is a Japanese singer and songwriter. She started her career in 1975 and first stopped in 1979, but is active again since 2001. She worked a lot with the guitarist 廣重嘉之 (Yoshiyuki Hiroshige) / Jojo Hiroshige. She has also written a poetry book and made a large amount of artwork.