Sumo+wrestling

Sumo wrestling is a competitive full contact sport that is incredibly popular in Japan. It is played on a circular ring where a sumo wrestler's objective is to force the other opponent out of the ring or have him touch the ground with anything other then their feet. The ring is 4.55 meters in diameter, and 16.26 square rice-straw bales on top of a platform made of clay mixed with sand.
 * Sumo Wrestling**

Sumo is a traditional sport that originated in Japan. It is a strict sport that requires special daily life habits. It is not an Olympic sport. It is meant to test the strengths in combat and ritual of the Shinto religion.

There are currently 54 stables in Japan that hold 700 sumo wrestlers. Often wrestlers have little choice in their name, which is given to them by their trainer, or by a supporter or family member who encouraged them into the sport. A wrestler may change his wrestling name several times during his sumo career.