In the featherweight division, "Automo03-Sandan" — a robot dressed in karate gear — is no match for "Leghorn," a chicken-like robot known for its vicious "Chicken Chop" martial art moves.

TOKYO (Reuters) - One by one the fighters strut into the Korakuen stadium hall in Tokyo, accompanied by thunderous applause. Sign up here. But this is no normal wrestling match -- the contenders ...