The sumo is considered to be the Japanese national sport, and it is the sports of the Japanese origin which is performed globally. For a professional competition, performance is performed in form called the Grand Sumo Tournament in Japan.
Originally, not sports, it was an act of God that a man with the power gave the power to in in front of God. Therefore manners to show respect for God are made much of.
Because they compete for the superiority and inferiority only with the body of the contestant without using a tool in a nude body, it is the competition of the wrestling system, and, for the system of sports, it is transcribed in the English with "Sumo-Wrestling".
We call the competition of the martial art to grapple together sumo generally in Japan. There are arm wrestling, leg wrestling, finger wrestling for an example.
Shinzo Abe is the 90th Japanese prime minister. He was expected as a successor since Koizumi was the prime minister. However, the approval rating to him keeps decreasing because politician's corruption scandal happened frequently.