Sumo (相撲 sumō?) Is a sport of push between two obsessive bodies until one is pushed out of the circle or falls with the body other than the sole of the foot touching the ground on the inside of the circle. Pesumo (rikishi) needs big bodies and fat because the more wrestling a sumo wrestler the greater the possibility to win.
Sumo is a genuine Japanese sport and has been contested since many centuries ago. In some neighboring countries like Mongolia and Korea there are also traditional wrestling sports that are similar to sumo.
Sumo has a variety of ceremonies and unique traditions such as spreading salt throughout the game to repel the reinforcements.
Just as various types of wrestling sports exist throughout the world, sumo has been known in Japan since prehistoric times. In the classical Japanese literature of the 8th century AD, the initial form of sumo is known as Sumai. Sumo in a form that is known today may be different from "sumo" in ancient times. Wrestlers often fight to death because the number of rules is still small.
The 16th century Japanese ruler named Oda Nobunaga often hosts sumo tournaments. The shape of the sumo ring as it is known today comes from the time of Oda Nobunaga. Compared to today's mawashi made of fine, rigid fabrics, the sumo wrestlers of Oda Nobunaga's time still wear the lower body coverings of loose rags. In the Edo period, sumo wrestlers competed in wearing a beautiful and dashing mawashi called kesho mawashi. In present day kesho mawashi only worn sumo wrestlers while parading on the dohyō at the start of the tournament opening.