A Hokkaido man has been arrested for allegedly threatening to kill Mongolian-born sumo yokozuna Asashoryu, Tokyo police said Thursday.

Chiharu Takahashi, 29, is suspected of using a personal computer at his home in Hokuto to post a message on an Internet bulletin board around Sunday saying, "I will go to Kokugikan (sumo arena) now to kill (the grand champion)."

Investigators received a tip Sunday evening from a person who found the threatening message on the bulletin board. Police had tightened security around Asashoryu's Takasago stable.

The suspect was quoted as telling investigators that he had been disgusted with Asashoryu's behavior as a yokozuna and posted the message for fun.

Takahashi also told police that he had expected the posting to frighten the grand champion and cause him to lose his sumo bouts.

He gave himself up to the Hakodate Central Police Station on Wednesday after being surprised to learn that his posting had made headlines.

Asashoryu had posted a 4-0 win-loss record as of Wednesday in the ongoing New Year Grand Sumo Tournament at Ryogoku Kokugikan in Tokyo after missing the Kyushu tournament in November.