Promotion-chasing Harumafuji barely broke sweat in yanking down Kaisei to make it four wins out of four at the Autumn Grand Sumo Tournament on Wednesday.

The ozeki formerly known as Ama, who won the Nagoya title in July with a spotless 15-0 record and is hoping to make it third time lucky in his bid to reach sumo's ultimate rank of yokozuna, dismantled top-ranked maegashira Kaisei (1-3) at the charge and wasted no time in sending the Brazilian-born grappler to the dirt with a pulling overarm throw to retain his share of the lead.

On a day when Estonian bulldozer Baruto and fellow ozeki Kotoshogiku both dropped out of their fourth-day matches at the 15-day Tokyo basho through injury, Hakuho won handsomely to keep his place among a pacesetting pack of six wrestlers.