Robot sumo wrestlers from 10 countries battled each other Sunday at Tokyo's Ryogoku Kokugikan, the Mecca of traditional sumo, in the first such event of its kind.

A Latvian team named Robotu Skola took the title in the autonomous category at the inaugural International Robot Sumo Tournament, which saw 31 sumo machines face off.

A Japanese high school team named Mirai Robo Koken from Oita Prefecture won the radio-controlled category, which saw 10 robots compete.