New yokozuna Hoshoryu took part in a traditional "tsuna-uchi" rope-making ceremony Thursday at his Tatsunami stable in Tokyo in preparation to step into the ring as sumo's sole grand champion.The 25-year-old Mongolian wrestler, whose real name is Sugarragchaa Byambasuren, officially became sumo's 74th yokozuna Wednesday in the wake of his championship at the New Year tournament.Wrestlers from the Dewanoumi "ichimon" group of stables, to which the Tatsunami stable belongs, helped hand-twist the white rope that is ceremonially worn by yokozuna and completed the task in around two hours.Hoshor…READ FULL ARTICLE