Yokozuna Musashimaru suffered his first defeat at the hands of top maegashira Aminishiki but grand champion Asashoryu walloped Miyabiyama to avoid a second straight loss at the Nagoya Grand Sumo Tournament on Tuesday.

Musashimaru, who is back in action after missing three consecutive meets after surgery on his left wrist, tried to overpower Aminishiki using his trademark right-hand thrusts as the penultimate bout got under way at Aichi Prefectural Gymnasium in Nagoya.

But the No. 1 maegashira deftly spun around the massive yokozuna and quickly handcuffed one of his arms in a hold before rolling him abruptly over the edge for a decisive first win at the 15-day meet.

Musashimaru, who conspicuously failed to use his ailing left hand, became the third upset of the day after ozeki Kaio and Tochiazuma were also rocked by shock defeats.