K-1 is one of the most iconic names in combat sports, originally founded in Japan in 1993. The promotion helped shape modern kickboxing by blending multiple striking disciplines into a unified ruleset built around speed, power, and technical striking. K-1 became especially known for its tournament-style formats, including the heavyweight-focused World Grand Prix and the lighter-weight World MAX tournaments, both of which produced many of the sport’s most recognizable moments and athletes. Its identity is rooted in elite-level stand-up competition, fast-paced action, and a legacy that helped establish kickboxing as a global combat sport.