While performing in a movie at Toei Eigamura, Kinnikuman suddenly disappears. Somehow, he has been sent to Edo Period Japan. In Edo Japan, a villain called Shuten Douji (朱天童子) is threatening to destroy the Earth if he is not given Princess Mari. Always willing to impress a pretty girl, Kinnikuman immediately vows to destroy Shuten Doji. He disguises himself as Princess Mari and goes to meet Shuten Doji, but Shuten Doji and his Big Four (四天王, Shitennou) see through Kinnikuman's disguise and beat him up. Aware of Kinnikuman's situation, Terryman, Robin Mask, and the other Seigi Choujins travel to Edo Japan (via Kinkotsu-obaba's powers).
Hour of Triumph! Seigi Choujin is the fifth theatrical film based on the anime series Kinnikuman. It was released in Japan on December 21, 1985 and is set during the Dream Choujin Tag Arc.
It is the first film to feature seiyuu Banjou Ginga as the voice of Ramenman (due to Eiji Kanie's death in October) and the last to feature Kouji Yada. It is also the second film to feature the character Kinkotsu-Obaba, who had been omitted from the previous film.