Tomoko Mariya (毬谷 友子, Mariya Tomoko, March 25, 1960) is a Japanese actress, singer, writer, and lecturer at Musashino Art University. Her real name is Tomoko Yashiro (矢代 友子, Yashiro Tomoko) and her nickname is Ton-chan (とんちゃん). She is from Minato, Tokyo. Previously affiliated with J.Clip, she is now freelance.