Japan's national sport is sumo. Professional sumo is organized by the Japan Sumo Association, with wrestlers fighting in six tournaments each year. Each tournament is fifteen days long, and consists of each wrestler fighting one match per day. At the end of the fifteen days, all wrestlers with a positive win rate (ex, win attleast 8 of the 15 matches) move up one rank. Moving up a rank within the circuit contains numerous benefits (increased pay, social respect, etc). Sumo culture, typically puts a premium on honour, ritual, comraderie and asceticism; however, there is a relatively widespread norm in which wrestlers intentionally throw matches secretly, with the assumption of having matches thrown for them at a later date. This norm is actively denied by the Japan Sumo Association, and the Japanese government.