Having risen to sekiwake after a historic maiden championship in May, 24-year-old Onosato can earn an even bigger promotion at the Nagoya Grand Sumo Tournament starting Sunday.The Ishikawa Prefecture native, who captured the Emperor's Cup faster than any previous first-time champion, could move up to ozeki, sumo's second-highest rank, with another outstanding performance at the 15-day meet at Dolphins Arena. Onosato practiced Friday at his Nishonoseki stable's base in central Japan's Aichi Prefecture and said he was only looking as far ahead as his next bout."I'll focus on doing my best on…READ FULL ARTICLE