TOKYO (UPI) - Grand champion Tochinishiki threw 20-year-old Wakachichibu Friday for his sixth straight, win in the 15-day sumo tournament.
    Grand champion Wakanohana, who was upset Thursday by fourth-ranking: maegashira Naruyama for his only defeat thus far, had a close shave twice as strong fifth-ranking maegashira attacked with a leg throw.
    In the end Wakanohana pushed as he lifted his taller opponent and finally drove him out of the ring.
    Ozeki Kotogahama, who Thursday suffered his fifth straight defeat, withdrew from the tournament Friday on the advice of the Japan Sumo Assn.'s doctor, who said he was suffering from beriberi. As a result, fifth-ranking maegashira Matsunobori gained his second win by forfeit.
    Sekiwake Fusanishiki, who is handicapped by a foot injury, was beaten for the sixth straight day, this time by first-ranking maegashira Tsurugamine.