After becoming only the ninth sumo wrestler to win four straight tournaments, Asashoryu is poised to take a big step toward reaching a new landmark when the Autumn Grand Sumo Tournament gets under way Sunday.

News photoYokozuna Asashoryu (left) will have to overcome the likes of ozeki Kaio to capture his fifth straight Emperor's Cup. The Autumn Grand Sumo Tournament begins Sunday in Tokyo.

Asashoryu enters the 15-day tournament at Ryogoku Kokugikan as the sole yokozuna for the fifth straight time and once again the odds-on favorite to add to his collection of Emperor's Cups as his dominance on the dohyo clay appears unbreakable.