The 15 day autumn main professional sumo tournament opened at the specially constructed Kokugikan, Dojima Ohashi, Fukushima-ku, Osaka, Sunday, October 9, with attention centered on whether Masuiyama "ozeki," will be able to defend his championship.
    This is the second official tourney in Osaka, the first having been held last fall.
    The current competition is being participated in by all the leading wrestlers on the roster of the Japan Sumo Association including four "yokozuna" - Terukuni, Haguroyama, Maedayama and Azumafuji - and three "ozeki" - Masuiyama, Chiyonoyama and Saganohana.
    Heaviest among the grapplers is Azumafuji, who weighs 368 pounds, followed by Terukuni, 336 pounds.