World Judo Day is observed worldwide every October 28, commemorating the birthday of Kanō Jigorō, the founder of judo. Established by the International Judo Federation (IJF) in 2011, the day aims to celebrate judo through its educational aspects and increase the sport's visibility. Judo, a Japanese martial art created in 1882, emphasizes principles such as seiryoku zen'yō (maximum efficiency, minimum effort) and jita kyōei (mutual welfare and benefit). Each year, the IJF selects a theme that highlights one of judo's moral values, with past themes including "Respect," "Unity," and "Inclusion." Judo techniques include throwing, grappling, and limited striking, and the sport has evolved into various styles globally.