Grand champion Hakuho beat ozeki Tochinoshin on Wednesday to retain his lead at the Spring Grand Sumo Tournament with 12 straight wins.Hakuho faced little challenge from the struggling Tochinoshin (6-6), who has only beaten the 41-time top-division champion once in 28 matchups.The Mongolian yokozuna hemmed up Tochinoshin after a momentary stalemate, then turned on the gas after recharging his engine and deposited the ozeki over the straw.Fighting as a demotion-threatened "kadoban" ozeki, Tochinoshin needs to secure two wins over the final three days of the 15-day meet to retain his post at …READ FULL ARTICLE