TOKYO (AP) — Japan has a new sumo grand champion — or yokozuna — and the big news is he's Japanese.

Onosato, the new grand champion, weighs 191 kilograms (421 pounds) and he is the first Japanese competitor to reach the top rank since 2017. By comparison, the average weight of an NFL lineman is about 140 kilos, or just over 300 pounds.

The sport has recently been dominated by Mongolians and prior to Onosato, six of the previous seven yokozunas have been from Mongolia.

"I’ll devote myself to training so that I will not disgrace the title of yokozuna,” Onosato said Wednesday, dressed in a formal kimono and bowing as he sat on the floor. “I will aim to become a one-and-only yokozuna.”

Onosato, whose real name is Daiki Nakamura, is only 24 and was promoted Wednesday to sumo's top rank by the Japan Sumo Association. Onosato was promoted by winning last week's Summer Grand Sumo Tournament, which came after he won another prestigious tournament in March.

Onosato is from Ishikawa prefecture, which was hit on Jan. 1, 2024, by a devastating earthquake and tsunami that killed about 600 people in the prefecture and caused widespread damage. Much of the destruction was centered on an area known as the Noto Peninsula.

“I will work hard as a yokozuna to encourage and cheer up the Ishikawa prefecture and the Noto region,” he said.

He then added: “I determined that yokozuna should be my goal once I entered the world of sumo," he said. “It’s not easy to achieve and I’m really delighted.”

Sumo is regarded as Japan's national sport, or most sacred sport, and many of the ritual elements are connected to Shinto, Japan's indigenous religion.

Sumo's origins date back more than 1,000 years, and Japan is the only country where it is contested on a professional level.

The sport is highly regimented with many wrestlers living in communal training facilities where food and dress are controlled by ancient traditions.

Onosato’s promotion will set up an instant rivalry with Mongolia-born Hoshoryu, who is the other wrestler in Japan to hold the yokozuna title.

The Japanese news agency Kyodo said the two sumo stars are due to meet in a tournament in July in the central city of Nagoya.

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Onosato speaks during an interview with media members at his sumo training facility after winning a sumo wrestling tournament in Ami, northeast of Tokyo, Monday, May 26, 2025. (Yuya Shino/Kyodo News via AP)

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Onosato, right, raises hands for his victory of a sumo wrestling tournament during a celebratory parade at Ryogoku Kokugikan arena in Tokyo, Sunday, May 25, 2025. (Daiki Katagiri/Kyodo News via AP)

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Onosato, left, wrestles with Wakamotoharu in a sumo wrestling tournament at Ryogoku Kokugikan arena in Tokyo, Sunday, May 11, 2025. (Taichi Nagahisa/Kyodo News via AP)

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