Master of the ancient jujutsu arts employed by the samurai soldier-warriors of feudal Japan. He is sixty years old and has trained since before World War II, during the "old days" of martial arts. His art utilizes the martial arts principle of aiki, which turns opponents' attacks against them. He manages to reach the semi-finals of the Maximum Tournament series, where he battles Jack Hanma. In his third match against Doppo, Gouki is shown to act in an insane manner while fighting. He also states that he has killed many people. He later teams up with Baki to face the Japanese convict Yanagi Ryukou in the 'Search of Our Strongest Hero' series. He also has a friendly sparring match with Biscuit Oliva and another match with Mohammad Ali Jr. In the Maximum Tournament, he faces Roger Harlon in round 1, and Shinogi Koushou in round 2, before facing Doppo in round 3 and losing to Jack Hammer in round 4. When not fighting, he is quite eccentric (as well as a bit senile), living for the day and fearing nothing. Although in the series Gouki is said to be a master of the old style of jujutsu, and when he fights Doppo it is said that he represents Jujitsu, most of Gouki's techniques look like Aikido, and even Gouki himself resembles the Aikido Master Gozo Shioda, founder of Yoshinkan Aikido.
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