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.^[1]

• Aliens Next Door (1 tankōbon)
• Assemble Insert
• Atom: The Beginning
• Birdy the Mighty
  • Original version: 1 tankōbon
  • Remake: 20 tankōbon as of October 2008
• Birdy the Mighty: Evolution
  • 13 tankōbon as of October 2012
• Doyō Wide Satsujin Jiken (1 tankōbon, co-authored with Miki Tori)
  • Doyō Wide Satsujin Jiken: Kyōto Waraningyō Satsujin Jiken (1 tankōbon)
• Jaja Uma Grooming Up! (26 tankōbon, 14 bunkoban)
• Kyūkyoku Chōjin R (5 bunkobon)
• Magical Lucy
• Mariana Densetsu (3 tankōbon)
• Pangea no Musume Kunie (5 tankōbon)
• Parody World
• Mobile Police Patlabor (22 tankōbon, 11 wideban, 11 bunkoban)
• Shinkurō, Hashiru! (11 tankōbon as of September 2022)
• Yamato Takeru no Bōken
• Yūki Masami no Hateshinai Monogatari (2 tankōbon)

Yuki is also the designer of the avatar mascot for the Vocaloid Gumi.