Mongolian grand champion Hakuho crashed to a shock first defeat at the Nagoya Grand Sumo Tournament on Wednesday, but still managed to hold onto sole possession of the lead with four days of the meet remaining.

Hakuho (10-1) was widely expected to keep his flawless record intact and match former ozeki Kaio's all-time wins record of 1,047 in the day's finale at Aichi Prefectural Gymnasium.

But newly promoted sekiwake Mitakeumi (8-3) had other ideas and after getting a right-hand grip on the back of the yokozuna's belt, muscled him over the straw ridge.

"I just tried to wrestle my own way. I am delighted," said Mitakeumi, whose only previous win against Hakuho came by default after the yokozuna pulled out of the Spring meet in March with an injury.

Hakuho still has four days to match and then surpass Kaio's record. The 38-time Emperor's Cup winner faces sekiwake Tamawashi on Thursday.

Hakuho managed to stay one win clear after his closest rival, Bulgarian born No. 8 maegashira Aoiyama (9-2) was dragged down to a second defeat by 15th-ranked Nishikigi (6-5).

Onosho, a No. 6 maegashira, also has a 9-2 record, thanks to a hand pull down win against 13th-ranked Takarafuji (8-3).

In the day's penultimate bout, yokozuna Harumafuji made short work of Chiyoshoma (4-7), flooring the fifth-ranked maegashira with a textbook tottari arm bar throw.

Takayasu remained two wins off the pace, the ozeki debutant losing control of his bout against Tamawashi (6-5) and getting blasted over the straw bales.

Ozeki Goeido improved to 6-5 with a no-nonsense "oshidashi" frontal push out win against fourth-ranked maegashira Ura, who also has a 6-5 mark.