Hakuho and Kakuryu grabbed a share of first place Friday at the Spring Grand Sumo tournament after sole overnight leader Aoiyama suffered his second loss.The Mongolian-born grand champions sit alongside the rank-and-file grappler at 11-2 following an action-packed Day 13 at Edion Arena Osaka.Hakuho overpowered fellow title contender Asanoyama in the day's marquee bout, while Kakuryu compounded struggling ozeki Takakeisho's woes.No. 13 maegashira Aoiyama, meanwhile, may have blown his best shot at an Emperor's Cup following an underwhelming loss to No. 9 Takonosho.In the day's final clash, H…READ FULL ARTICLE