A summary indictment was filed Thursday against former sumo grand champion Harumafuji for assaulting a lower-ranked wrestler, prosecutors said.
The 33-year-old Mongolian former yokozuna is expected to be fined following an order by the Tottori Summary Court for beating Takanoiwa, also a Mongolian wrestler, who sustained head injuries.
A summary indictment is a simplified proceeding that skips court examination and applies to less serious offenses resulting in fines of 1 million yen (about $8,900) or less.
Prosecutors appear to have concluded that the case warranted a summary indictment after taking into account Takanoiwa's desire to see Harumafuji punished as well as the public criticism that the former yokozuna has received, sources close to the matter said.
Weeks after the scandal surfaced, Harumafuji announced his retirement on Nov. 29, putting an end to his 17-year sumo career.
While drinking in a bar in the city of Tottori, western Japan, from late on Oct. 25 into the early hours of Oct. 26, Harumafuji beat Takanoiwa with an open hand and a karaoke machine remote control.
Harumafuji has admitted to assaulting his compatriot in the presence of Hakuho and Kakuryu, both Mongolian yokozuna, as well as other wrestlers and locals.
Harumafuji is believed to have been angered by Takanoiwa's inattention while Hakuho was giving him advice, according to people familiar with the matter.
Takanoiwa missed the Kyushu Grand Sumo Tournament in Fukuoka after being diagnosed with head injuries, including a suspected fracture at the base of his skull.
Speaking at a press conference upon his retirement, Harumafuji said he had been trying to fulfill his outside-the-ring duty to teach Takanoiwa manners but ended up "hurting" him and "caused a stir."
He released a comment through his lawyer on Thursday following the summary indictment, saying, "My life has changed a lot to my chagrin, but I claim full responsibility."