Kamen Rider SD (仮面ライダーSD, Kamen Raidā Esu Dī, Masked Rider Super Deformed) is the collective title for a series of media released in the 1990s that are based on Toei's popular Kamen Rider Series. It features super deformed versions of the various Kamen Riders featured from Kamen Rider through Black RX placed in a cartoonish world, where each enemy of the Riders has banded together under the command of the "Great Leader" under the name "Gran Shocker".

Karate Champ, known in Japan as Karate Dō (空手道, "The Way of the Empty Hand"?) is a 1984 arcade game developed by Technōs Japan for Data East.

Kick Master is a side-scrolling action video game for the Nintendo Entertainment System that was released in 1992 by Taito. The game has some role-playing game elements, such as leveling up.

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.