Yokozuna Hakuho, winner of a record 45 grand sumo tournament titles, informed the Japan Sumo Association on Monday of his decision to retire.JSA President Hakkaku said during a meeting that the grand champion has conveyed his decision to call it a career, according to Hironori Yano, the head of the JSA's Yokozuna Deliberation Council.The 36-year-old Mongolian-born great had been considering retirement after struggling to recover from a right knee injury that has kept him out of a number of tournaments in recent years, according to a source familiar with the matter.A source at his Miyagino s…READ FULL ARTICLE