Judo: Japan's Gentle Way and the Kodokan

Published October 13, 2026 at 11:41 PM JST | By Tokyo Paul

Judo is one of Japan's best-known gifts to the sporting world. Practiced in school gyms, community dojos, and Olympic arenas, it is a martial art built on throws, grappling, balance, and mutual respect. The word judo means "gentle way," and the name captures the idea that skill and timing can matter more than raw strength. A smaller person who moves smoothly and uses a partner's energy can often do surprising things, and that idea is part of the art's charm.

This guide introduces the story of judo, its founder, the principles that guide training, the belt system, and the Kodokan, the famous institute in Tokyo that remains its home. We will also look at how visitors can enjoy judo in Japan, whether that means watching a session or simply learning a little more about the culture behind it.

Kano Jigoro and the Birth of Judo

Judo was created by Kano Jigoro, who founded the Kodokan in 1882. As described on the English Wikipedia page about judo, he drew on older jujutsu schools, but made important changes. He emphasized free practice, called randori, and removed the striking and weapons that were part of some older systems, shaping an art that could be practiced safely and taught widely. The original Kodokan began with nine disciples in a small space in a temple called Eisho-ji, where there were only twelve mats.

Kano saw judo as a path for personal growth and for the benefit of society, not just a set of fighting skills. He was also a teacher and educator, and his ideas helped spread judo through schools in Japan and then around the world. Today, millions of people practice judo in many countries, and its terms, such as "dojo," "randori," and "ippon," have become familiar in many languages. For a traveler, this means that a short visit to a judo hall in Japan can feel surprisingly familiar, because the words, bows, and rituals are shared by practitioners worldwide.

The Principles Behind the Practice

Two guiding ideas shape judo. The first is seiryoku zen'yo, usually translated as "maximum efficiency with minimum effort." It means using your body and your partner's movement wisely, not wasting energy. The second is jita kyoei, meaning "mutual welfare and benefit." This reminds practitioners that training is not about defeating others but about helping each other improve. The thought that softness can overcome hardness, by yielding and redirecting force, is a classic example of the judo mindset.

These principles show up in everyday training. Partners cooperate to practice throws, take turns being thrown and throwing, and thank each other afterward. A good judoka is expected to be humble, respectful, and kind. Many dojos begin and end with a bow, and students are taught to care for their partner's safety throughout the session.

Throws, Grappling, and Safe Falling

Judo technique falls into several groups. Throws, called nage-waza, bring a partner to the mat with balance and timing. Grappling and pins, called katame-waza, include holds and controls on the ground. Restricted striking techniques, called atemi-waza, also form a small part of the art. Perhaps the most important skill for a beginner is ukemi, the art of falling safely. Students learn to roll and slap the mat so that they can train throws without getting hurt.

Training includes randori, which is free practice where partners apply techniques with resistance, and kata, which are pre-arranged forms that teach principles and preserve traditional techniques. This balance of lively practice and careful study helps students improve while keeping the art's heritage alive.

Belts, Ranks, and the Olympic Stage

Judo uses a rank system of kyu grades, shown by colored belts, followed by dan grades, which are marked by the black belt. The system was influenced by the board game Go, which also uses kyu and dan ranks. Judo's ranking system and uniform later inspired other martial arts. For example, the founder of modern karate adopted judo's style of uniforms, colored belts, and dan grades, as the English Wikipedia page about karate explains.

Judo also has a proud Olympic history. Men first competed in judo at the 1964 Tokyo Games, and women began competing for medals at the 1992 Games. The sport's Olympic appearance in Tokyo was a milestone, showing a Japanese martial art to a global audience. Today, judo is a major international sport with competitions held worldwide.

Visiting the Kodokan in Tokyo

The Kodokan is located in Bunkyo ward, Tokyo, and it serves as the center of judo. According to the English Wikipedia page about the Kodokan Judo Institute, the building is eight stories tall with a basement and includes training halls, a library, and exhibition spaces. The main dojo is on the seventh floor and has 420 mats, while about 900 spectators can be seated on the eighth floor. The institute has several major dojos, including an International Dojo.

Short-term visitors can usually watch practice or competitions from the main floor, though taking part generally requires permission. The second floor includes the Kano Memorial Hall and a historical hall with an exhibition room that displays posters, documents, and photographs about judo's development and Kano's life. The Kodokan also offers courses for novices and special courses for advanced students, and foreign students can take part in randori. Because schedules, rules, and fees can change, it is best to check the Kodokan's official information or contact the institute before visiting. Arriving with a little background knowledge makes the visit more rewarding, since you will recognize the names of the techniques, the meaning of the bows, and the importance of the founder's memorial spaces. Many visitors find that simply sitting in the gallery and watching dozens of pairs of students practicing at once is a memorable way to feel the energy of a living tradition.

If you do watch a session, remember that a dojo is a place of respect. Dress neatly, keep quiet, and avoid stepping onto the mats unless invited. Ask before taking photographs. A polite bow and a quiet thank-you at the end are always appreciated.

Quick Takeaways

Judo, the gentle way, was founded by Kano Jigoro in 1882 and is built on efficient movement and mutual benefit. It uses throws, grappling, and careful falling practice, with ranks that run from kyu grades to the black belt and beyond. It joined the Olympic Games in Tokyo in 1964, and the Kodokan in Tokyo remains its spiritual home. Visitors can often watch practice there, and learning a little about the art enriches any trip to Japan.

Whether you try judo yourself or simply admire it from the side, the spirit of respect and shared growth is easy to feel. We hope this guide gives you a warm introduction to the gentle way.