Kinnikuman (Japanese: キン肉マン, lit. "Muscleman") is a manga series created by the duo Yoshinori Nakai and Takashi Shimada, known as Yudetamago. It follows Suguru Kinniku, a superhero who must win a wrestling tournament to retain the title of prince of Planet Kinniku. Nakai and Takashi planned the series when they were attending high school originally as a parody to Ultraman. The manga was originally published in Shueisha's Weekly Shōnen Jump from 1979 to 1987, and was first adapted by Toei Animation into a 137-episode anime series broadcast on Nippon Television from 1983 to 1986. It restarted publication in 2011, and has spawned spin-off manga and anime series, video games and Kinnikuman-related merchandise. The manga series has been popular in Japan, selling over 66 million copies by 2007. As popular as was the anime series and its merchandise, such as Kinkeshi, a line of action figurines released as M.U.S.C.L.E. in the Northern America. Although it received the Shogakukan Manga Award for children's manga in 1985, it has received mixed reviews from critics.