The Japan Sumo Association says a top division wrestler has used violence against an attendant, resulting in an injury.
Association officials said on Wednesday that Takanoiwa hit his attendant several times with his open hand and fist at a hotel room in the city of Yukuhashi, southwestern Japan on Tuesday night. Takanoiwa stayed at the hotel with other wrestlers ahead of matches the following day as part of a regional tour.
The officials said the attendant's injury is a swollen cheek.
They said Takanoiwa told them on Wednesday that the attendant made an excuse for having forgotten something, so that he hit him 4 or 5 times.
Takanoiwa was injured in October of last year when then Yokozuna grand champion Harumafuji hit him with a karaoke machine remote control and other means in the city of Tottori, western Japan. Both wrestlers are from Mongolia. Harumafuji later took responsibility for the assault by leaving the sumo world.