Sumo was originally known by the name of "sumai", which means struggle, sumo became known around 20 B.C. as an accepted military combat.
Many of the modern sumo techniques were used by Sumai in addition a variety of strikes as well. It resembled many other wrestling arts for instance Mongolian wrestling, and also Indian wrestling. Prior to the 16th century most wrestling was practiced to be used in battle. After the 16th century it evolved and eventually became better known as sumo.
Due to its ranks, rules and ring, this makes sumo a sport of giants. The use of the water ceremony, bowing, the costumes, and the beautiful pageantry are all part of the ancient military traditions, these traditions continue to be recognized today and especially in competitions. Following a competition is easy, and recognizing the winner one will note that the winner is the one that forces his opponent out of the ring, or the one who will force his opponent body part above the knee to touch the floor, the first one to achieve this is declared the winner.
Techniques applied to this art are tsuppari (slapping), ketaguri (sweeps) plus a wide variety of utchari (sacrifice throws).