Kamen Boxer

(from mangapedia):

One day, Kenichiro, a commissioner of the Boxing Association, was kidnapped by the "World Domination Gym". Kenichiro returns safely a few days later, but his condition has changed, and he begins to accept the World Domination Gym's demands one after another, which deviate from the rules of boxing.

As the boxing world is on the verge of an unprecedented crisis caused by boxers wearing the approved goods, a boxer stands up to stop the ambitions of the World Domination Gym.

Shimamoto's parody of Kamen Rider and Tomorrow's Joe.