Judo

Judo
Name	Judo
Focus	Throwing, grappling, submissions
Hardness	Full-contact
Country	Japan
Creator	Kanō Jigorō
Parenthood	Jujutsu, Sambo, Brazilian jiu-jitsu
Descendant	Brazilian jiu-jitsu, Sambo
Olympic	Yes (since 1964 Summer Olympics)

Judo Judo is a modern Japanese martial art and combat sport founded in 1882 by Kanō Jigorō that emphasizes throws, pins, joint locks, and chokes. It developed from multiple Jujutsu schools such as Tenjin Shin'yō-ryū and Kito-ryu and spread internationally through figures like Mitsuyo Maeda and institutions such as the Kodokan. Judo influenced and was influenced by combat systems and sports including Sambo, Brazilian jiu-jitsu, and Olympic wrestling, becoming an international competitive discipline governed by organizations like the International Judo Federation.

History

Kanō established the Kodokan in 1882 in Tokyo to systematize techniques derived from traditional Jujutsu schools and to promote physical education in the Meiji era alongside figures such as Morihei Ueshiba and educators in Tokyo Imperial University. Early promoters included Yamashita Yoshiaki and students like Shiro Saigo and Sakujiro Yokoyama, who demonstrated throws in exhibitions and challenge matches against practitioners of sumo and boxing. Overseas expansion was propelled by Mitsuyo Maeda, who traveled to Europe and the Americas, influencing grapplers such as Carlos Gracie and helping spawn Brazilian jiu-jitsu. Judo’s competitive rules evolved during the 20th century, culminating in inclusion at the 1964 Summer Olympics in Tokyo and later governance by the International Judo Federation, while national bodies like the All Japan Judo Federation and the United States Judo Federation organized domestic structures.

Principles and Techniques

The pedagogical philosophy Kanō promoted—Seiryoku Zenyo and Jita Kyoei—parallels principles taught in institutions such as Tokyo Imperial University and informed by thinkers like Fukuzawa Yukichi. Core techniques categorize into throwing (nage-waza) exemplified by Seoi nage and Uchi mata, and groundwork (ne-waza) including pins (osaekomi-waza), joint locks (kansetsu-waza) such as juji gatame, and choking techniques (shime-waza) akin to those employed by practitioners from Tenjin Shin'yō-ryū. Technique pedagogy has been documented by masters including Kyuzo Mifune and Kano Jigoro's senior students, and later refined through competition rule changes influenced by the International Olympic Committee and the International Judo Federation.

Competition

Competitive judo matches occur under regulations set by the International Judo Federation and national federations like the All Japan Judo Federation and USA Judo. Events include weight-class tournaments at the World Judo Championships, continental games such as the Asian Games and the Pan American Games, and the Olympic Games since 1964 Summer Olympics. Scoring uses ippon and waza-ari, with penalties (shido) affecting outcomes; these rules have been revised by bodies including the IJF Refereeing Commission and have influenced athletes like Teddy Riner, Ryoko Tani, Yasuhiro Yamashita, Neil Adams, and Ilias Iliadis. Team events and mixed team matches were added to multi-sport competitions, reflecting formats used at the World Judo Team Championships and the Olympic mixed team event.

Training and Ranking

Training occurs in dojos often affiliated with the Kodokan or national federations and led by sensei certified through organizations such as the International Judo Federation and national coaching bodies. Randori (free practice) and kata (prearranged forms) are central to pedagogy; canonical kata include Nage-no-kata and Katame-no-kata codified by the Kodokan. Progression is marked by kyu and dan grades; kyu grades often employ colored belts following systems used by federations like the All Japan Judo Federation and national bodies in France, Brazil, and the United Kingdom. Dan promotion criteria and honorary ranks such as hanshi or roku-dan are regulated by entities like the Kodokan and national councils.

Equipment and Attire

Practitioners wear a judogi with jacket and trousers standardized by the International Judo Federation for competition; brands and suppliers adhere to specifications used at events like the World Judo Championships. Competition mats follow safety and dimension standards set by the International Judo Federation and national federations, historically developed from training surfaces in Japanese universities including Keio University and the University of Tokyo. Protective gear is minimal compared with some sports; use of mouthguards or taping is governed in tournaments by bodies like the IJF Medical Commission.

Safety and Injuries

Safety protocols derive from educational reforms promoted by Kanō and by modern medical guidelines from organizations such as the International Judo Federation Medical Commission and national sports medicine societies like the American College of Sports Medicine. Common injuries include sprains, dislocations, and concussions; neck and shoulder injuries have been studied by authors affiliated with institutions such as University College London and Osaka University Hospital. Rule changes and referee education overseen by the IJF Refereeing Commission aim to reduce dangerous techniques and medically significant outcomes, with return-to-play protocols informed by research from the International Olympic Committee and sports medicine journals.

Cultural Impact and Global Organization

Judo has influenced popular culture, education, and law enforcement training worldwide, evident in programs supported by the United Nations’s sport initiatives and national ministries of sport in countries like France, Brazil, and Russia. The sport’s global governance is led by the International Judo Federation, with continental unions such as the European Judo Union, African Judo Union, JudoUnion European affiliate organizations, and national federations including All Japan Judo Federation, USA Judo, Brazilian Judo Confederation, and the Russian Judo Federation. Prominent judoka such as Anton Geesink, Neil Adams, Rae**?** have become cultural ambassadors; judo’s pedagogical model influenced martial arts founders like Helio Gracie and institutions like the Kodokan continue to shape martial practice, pedagogy, and Olympic sport policy.

Category:Martial arts