Ozeki Onosato remained undefeated in his quest for yokozuna promotion Friday at the Summer Grand Sumo Tournament by easily pushing out rank-and-file opponent Gonoyama.The March tournament winner, aiming to seal promotion with another championship, moved into a two-way tie for the lead with No. 7 maegashira Hakuoho as both improved to a flawless 6-0 on Day 6 at Tokyo's Ryogoku Kokugikan arena.Onosato faced a strong opening charge from winless No. 2 maegashira Gonoyama but held his ground before reversing the momentum and driving the rank-and-file wrestler over the edge.Hoshoryu, the sport's …READ FULL ARTICLE