Akuma (in Japanese, "devil"), known in Japan as Gouki 豪鬼, is a video game character from the Street Fighter series of fighting games. Akuma made his debut in Super Street Fighter II Turbo as a secret character and hidden boss. In the storyline of the Street Fighter video games, he is the younger brother of Ryu and Ken's sensei Gouken. In some games he also has an enhanced version named Shin Akuma, or Shin Gouki ("True Gouki") in Japanese. Storywise, Shin Akuma is merely Akuma using the full extent of his power, compared to the "in-game" version which is Akuma voluntarily holding back his power to avoid ending fights prematurely.