Yokozuna Onosato suffered his first loss at the Autumn Grand Sumo Tournament on Wednesday, while ozeki Kotozakura became the only unbeaten wrestler after four days.Ukrainian ozeki Aonishiki surrendered his first loss on Day 4 of the 15-day competition to join 15 others at 3-1 in the elite makuuchi division.Another ozeki, Kirishima, who is seeking promotion to sumo's highest rank of yokozuna, remained one win off the lead at Tokyo's Ryogoku Kokugikan.Onosato (3-1) was driven back by a fierce barrage of thrusts from No. 2 maegashira Takayasu (2-2), before being thrust down and out of the ring…READ FULL ARTICLE