Sumo is a contact sport which is also 1,500 year old Japanese cultural tradition. There are more than seven hundred professional sumo wrestlers in Japan. Sumo wrestlers normally weighing over 100kg. In a Sumo game, Sumo wrestlers wearing nothing but a loincloth surround the ring. Sumo wrestlers hit head to head, push each other and try to throw the opponent out of the ring. This is a about the passion of the Japanese. If you are interested the tradition of Japan, you may consider to visit Tokyo in May.