Joint overnight leader Kotoshoho stunned yokozuna Onosato at the Nagoya Grand Sumo Tournament on Friday to remain tied for first place with young Ukrainian sensation Aonishiki at 11-2.No. 1 maegashira Aonishiki and No. 15 maegashira Kotoshoho started Day 13 at IG Arena in a two-way deadlock for the lead, with the 21-year-old European the first to hold serve by knocking former front-runner Ichiyamamoto (9-4) off the leaderboard.The 25-year-old Kotoshoho then shocked the crowd in the day's final bout as he dealt a crushing blow to Onosato's bid for a third straight championship while earning …READ FULL ARTICLE