Nagoya Grand Sumo Tournament winner Kotoshoho vowed to keep rising after jumping 10 places in the latest rankings released Monday, setting his sights on the three "sanyaku" ranks below yokozuna.The 26-year-old from the Sadogatake stable will contest the Sept. 14-28 Autumn Grand Sumo Tournament at Tokyo's Ryogoku Kokugikan arena as a No. 5 maegashira in the wake of his maiden makuuchi-division championship with a 13-2 record in July."I'm still in a position where I need to challenge myself," Kotoshoho said at the stable in Matsudo, in his native Chiba Prefecture. "I'll aim higher from here."…READ FULL ARTICLE