Masami Yuki (ゆうきまさみ, Yūki Masami), real name Shūji Satō (佐藤修司 Satō Shūji, born December 19, 1957, in Kutchan, Abuta District, Hokkaidō), is a Japanese manga artist.

Yuki graduated from Kutchan High School. He is a member of the artist group known as Headgear. In 1991, his manga Mobile Police Patlabor received the 36th Shogakukan Manga Award for shōnen.

Yuki is also the designer of the avatar mascot for the Vocaloid Gumi.^{[citation needed]}