NAGOYA, Japan — Grand champion Hakuho improved to a perfect 10-0 at the Nagoya Grand Sumo tournament on Tuesday with a bulldozing win over Kotoshogiku.

The Mongolian yokozuna firmly gripped Kotoshogiku's belt while driving the sekiwake toward the straw ridge, then shoved him out in the day's final bout at Aichi Prefectural Gymnasium.

Seeking his seventh Emperor's Cup, Hakuho also marked the 10-0 perfect winning streak for the first time since he climbed to sumo's top rank last year. He has a two-win lead over ozeki Kotomitsuki, who also won Tuesday.

Kotomitsuki pushed sekiwake Ama to the edge of the ring, grabbed the opponent's belt from behind and shoved him out, improving to 8-2. Ama slipped to 7-3.

Ozeki Chiyotaikai had his third defeat against seven victories as lower-ranked Tochinonada sent him flying out of the ring. Tochinonada, a No. 3 maegashira, is 4-6.

Bulgarian ozeki Kotooshu chased No. 4 maegashira Wakanosato toward the straw ridge and tossed him out, improving to 7-3. Wakanosato slipped to 4-6.

Another ozeki, Kaio, collected an easy victory to improve to 6-4 when Futeno slumped to the dirt surface on his knees.