The Japan Sumo Association has been questioned by the government over reports that hate speech was directed at Mongolian ozeki Terunofuji during the Spring Grand Sumo Tournament, according to a source close to the association.

Media reports said Terunofuji became the target of jeers and taunts after his controversial 14th-day victory in the tourney, when he was tied for the lead with debutant yokozuna Kisenosato. He entered the day's bout with a 12-1 record before slapping down sekiwake Kotoshogiku.

But his victory drew criticism from fans and sumo elders alike. Terunofuji jumped the gun on his charge, and after the wrestlers regrouped for another go, Terunofuji leaped out of the way of Kotoshogiku and knocked him down as he passed by, instead of taking him head-on as the fans at Edion Arena Osaka expected.