Harumafuji retired last month for injuring fellow Mongolian wrestler Takanoiwa while drinking at a restaurant-bar with other wrestlers in Tottori, an incident that has threatened to taint the image of Japan's national sport just as it was regaining popularity.
The summary indictment was filed against the former "yokozuna" (grand champion) for causing a chop wound by hitting Takanoiwa on the head with a karaoke machine remote control, an official at the local prosecutors office said.
