Completing a tournament of firsts, No. 1 maegashira Daieisho clinched his maiden top-division championship Sunday at the New Year Grand Sumo Tournament with a victory over fellow rank-and-file grappler Okinoumi.Daieisho finished the 15-day tournament at Ryogoku Kokugikan -- the first to be held under a state of emergency -- with a 13-2 record after coming into the final day with a one-win lead over ozeki Shodai.Knowing a win against No. 5 Okinoumi (7-8) would deliver him the championship, Daieisho got it done against another former sekiwake. Daieisho seized the advantage from the jump, hitt…READ FULL ARTICLE