Newly promoted komusubi Onosato overpowered lone yokozuna Terunofuji as the Summer Grand Sumo Tournament opened Sunday with a stunning string of upsets.The 23-year-old Onosato was the only winner among the three distinguished "sanyaku" ranks below yokozuna, claiming victory after all four ozeki and both sekiwake lost their opening bouts at Ryogoku Kokugikan.Having come into the 15-day meet with questions about whether his injury-racked body could hold up, the 32-year-old Terunofuji did little to dispel the doubters against Onosato.Neither of the powerfully built combatants had a clear upper…READ FULL ARTICLE