TOKYO, May 7 - The Japan Professional Sumo Association this morning announced the new rankings of wrestlers for the 15 day summer main tournament scheduled to open on May 15 at the specially constructed Kokugikan, Hamacho, Nihonbashi, Tokyo.
    The tourney will be participated in by all the grapplers on the roster of the association including all four "yokozuna" - Azumafuji, Maedayama, Terukuni and Haguroyama.