Sasuke is a Japanese sports entertainment television special in which 100 competitors attempt to complete a four stage obstacle course. An edited version, renamed Ninja Warrior, is screened in at least 18 other countries.

Through an interview or audition as well as trial rounds to test physical ability, the field of applicants is narrowed to 100 who will be allowed to compete in the 1st Stage. Sasuke consists of four stages of increasing difficulty; competitors must complete a stage to advance. For the purposes of fairness, a 1200-meter run was held before the 18th tournament. This run determined the competitors' starting positions. Each competition is taped prior to the air date and broadcast as a 3-hour show edited for time.

An online game based on the show has been made by G4 in the United States and is available on the network's website.

Source: Wikipedia.org