🥋Scope of this chapter. To understand how karate (空手) became a budō (武道, “martial way”), we must first understand how Kanō Jigorō (嘉納治五郎, 1860–1938) re-engineered jūjutsu (柔術) into the modern, educational, and physical-cultural discipline of jūdō (柔道). The “modern budō format” that Kanō put in place exerted a powerful influence on most of the modern Japanese “-dō” disciplines — jūdō, kendō, kyūdō, aikidō, and karatedō alike. Karate was institutionalized as karatedō (空手道) in part by mapping itself onto this template.
1. What Kanō Jigorō Actually Invented
Kanō Jigorō is often introduced simply as “the founder of jūdō.” That description is not wrong, but it underplays his historical significance. What Kanō did was not only to organize the techniques of various jūjutsu schools into a single coherent art called jūdō. He also assembled the modern budō format: a way of binding a martial art together with education, physical culture, and the cultivation of character.
This format is built out of the following components.
| Component | Kanō’s contribution |
|---|---|
| Name | Re-definition from -jutsu (“technique”) to -dō (“way”): jūjutsu → jūdō |
| Organization | The dōjō (道場) system, anchored in the founding of the Kōdōkan (講道館) in 1882 |
| Ranking | Codification of the dan-i (段位, black-belt grades) and kyū-i (級位, pre-black-belt grades) system, from the 1880s onward |
| Uniform | Standardization of the dōgi (道着, practice uniform) in the form of the jūdōgi |
| Etiquette | Formalization of bowing-in, bowing-out, and other ceremonial practices |
| Curriculum | The pairing of kata (形, prearranged forms) and randori (乱取り, free practice) |
| Ideology | Slogan-form ideals — seiryoku zen’yō (精力善用, “best use of energy”) and jita kyōei (自他共栄, “mutual welfare and benefit”), formally proclaimed in 1922 |
| Diffusion strategy | Integration into school physical education |
These eight components later became the standard format to which kendō, kyūdō, karatedō, aikidō, and many other modern Japanese “-dō” practices would refer. Kanō’s achievement was not only to create one specific martial art called jūdō, but to make visible a template that effectively answered the question, “What does a modern Japanese budō look like?”
2. Why “Technique” Had to Become “Way”
When Kanō founded the Kōdōkan in 1882 and called his art jūdō rather than jūjutsu, he was not merely changing a name. He was carrying out a fundamental redefinition of what a martial art is for.
Simplified, Kanō’s logic ran like this:
- Jūjutsu was an Edo-period martial art organized into many schools, focused on self-defense and combat technique.
- In the modernizing society of Meiji-era Japan (1868–1912), demand for jūjutsu as a practical fighting skill was shrinking, and the art risked losing its place altogether.
- The solution was to redefine jūjutsu as a means of cultivating the person through the body. That redefined art was jūdō.
- The character dō (道, “way”) signified not the techniques themselves, but the formation of the self through the techniques.
This strategy became the template for the modernization of martial arts in Japan. If a martial art remained a bare combat technique, it would lose its footing in modern society. But if it could be redefined as a vehicle for personal education, it could find a secure place in schools, in government policy, and in society at large.
Glossary: seiryoku zen’yō and jita kyōei. The two ideals Kanō ultimately placed at the heart of jūdō. Seiryoku zen’yō (精力善用) means “to make the best use of one’s energy (mental and physical).” Jita kyōei (自他共栄) means “mutual flourishing of self and others.” Rather than statements about technique, these are social and ethical ideals — slogans designed to declare that jūdō was not merely a fighting art. Although Kanō had been articulating these ideas for years, the two phrases were formally proclaimed together in 1922.
3. Kanō and Karate — A Direct Connection
Kanō Jigorō’s direct involvement with karate can be traced back to 1922, the year Funakoshi Gichin (船越義珍 / 富名腰義珍, 1868–1957) traveled to Tokyo and introduced tōde (唐手, the older notation for what would become karate) to mainland audiences. Funakoshi presented tōde at the Ministry of Education’s Undō Taiiku Tenrankai (運動体育展覧会, “Exhibition of Sport and Physical Education”), and at Kanō’s invitation he subsequently performed at the Kōdōkan, where he was joined by Gima Shinkin (儀間真謹, 1896–1989), then a student at Tokyo University of Commerce (the predecessor of today’s Hitotsubashi University).
This event was a powerful tailwind for the mainland diffusion of karate. In the Japanese martial-arts world of the time, Kanō’s authority was enormous; the fact that he himself took an interest in tōde mattered greatly for the art’s entry into the world of mainland budō. According to contemporary accounts, the Kōdōkan demonstration drew well over a hundred attendees and included Kanō personally questioning Funakoshi in detail about the techniques. It functioned, in effect, as a meeting between Okinawan tōde and Kōdōkan jūdō.
Equally important is the tradition that Kanō encouraged Funakoshi to take root on the mainland, and in doing so gave him an entry point into the institutional models embodied by jūdō and kendō. The reframing from “-jutsu” to “-dō,” the introduction of a dan-i ranking system, and the adoption of the dōgi uniform — the reforms Funakoshi carried out in the 1920s and 30s — make heavy reference to the institutional model of Kōdōkan jūdō.
4. What Karate Borrowed from Judo
The range of what karate borrowed from the jūdō template was wide.
| Element | Jūdō | Karate |
|---|---|---|
| Uniform | Jūdōgi (heavy cloth, lapelled jacket) | Karategi (lighter cloth, lapelled jacket; cut and construction closely modeled on the jūdōgi) |
| Belt | Rank shown by white and black belts (with brown and other intermediates added later) | White and black belts introduced first; brown, yellow, green, and other colored belts added later, with variations by school |
| Ranking | Shodan (1st dan) through 10th dan | Shodan through 10th dan (with details varying by school) |
| Training hall | The Kōdōkan model | Dōjō system patterned on the Kōdōkan |
| Etiquette | Bowing-in / bowing-out, seiza (正座, formal kneeling), mokusō (黙想, silent meditation) | Bowing-in / bowing-out, seiza, mokusō |
| Practice format | Kata and randori | Kata (型) and kumite (組手, sparring) |
| Ideology | Seiryoku zen’yō and jita kyōei | Slogan-form ideals articulated separately by each school |
Reading this table, it becomes clear that a large share of karate’s institutional skeleton owes a debt to the jūdō format.
The technical content, of course, is different. Jūdō is built around throws and grappling holds; karate developed around punches, kicks, blocks, and the practice of kata. But the institutional framework that packages those techniques bears the heavy imprint of Kanō’s format.
5. What the Borrowing Made Possible
What did this borrowing actually do for karate? Three effects can be identified.
5.1 The Acquisition of Institutional Legitimacy
By the early twentieth century, jūdō was already on its way to being socially recognized as a “legitimate Japanese budō.” By adopting the jūdō format, karate became readable as a budō comparable to jūdō and kendō — and that legibility was a major reason for its rapid spread through university clubs in the 1920s and 30s.
5.2 The Possibility of Mass Instruction
Kanō’s format was, from the outset, designed to be compatible with modern school education: group instruction, a graduated curriculum, objective evaluation through ranking, and a standardized uniform. By adopting this format, karate too could be taught to large numbers of students simultaneously in a university-club setting.
5.3 The Thinning of Okinawan-ness
This borrowing came at a cost. The jūdō format is, by origin, a mainland-Japanese, modern budō format. The moment karate adopted it, the older Okinawan modes of transmission — household-based, neighborhood-based, oral, and personalized — were pushed to the periphery, and the mainland-style standardized format took center stage.
6. Did Kanō’s Ideals Carry Over to Karate?
Kanō’s twin ideals of seiryoku zen’yō and jita kyōei are not merely technical claims; they are social and ethical principles. Karate borrowed the jūdō institutional format extensively, but it did not adopt these two specific slogans wholesale as a shared creed for the karate world as a whole. Instead, each school and each organization devised its own.
- The Funakoshi lineage (Shōtōkan): “Karate ni sente nashi” (空手に先手なし, “There is no first attack in karate”), “Jinkaku kansei ni tsutomuru koto” (人格完成に努むること, “Strive for the perfection of character”), and so on.
- The Gōjū-ryū lineage: the very name Gōjū (剛柔, “hard and soft”) embodies the school’s ideal of integrating hard and soft, breath, and forging of the body.
- The Kyokushinkaikan: “Atama wa hikuku, me wa takaku, kuchi tsutsushinde kokoro hiroku, kō wo genten to shite ta wo eki su” (頭は低く目は高く、口慎んで心広く、孝を原点として他を益す, “Head low, eyes high, mouth restrained, heart wide; with filial piety as the starting point, benefit others”) — the so-called “Kyokushin Spirit” (極真の精神), said to have been supervised by the novelist Yoshikawa Eiji (吉川英治). (Note: the formal seven-article dōjō-kun (道場訓) of the Kyokushinkaikan, beginning with “We will polish body and mind…,” is a separate text.)
Methodologically these slogans resemble Kanō’s strategy: a small number of concentrated phrases meant to be shared and internalized through practice. But their substance is school-specific. Karate developed as a budō that referenced Kanō’s format institutionally while preserving ideological diversity at the level of schools and organizations.
7. The Globalization of the Kanō Format
After World War II, karate went global. What it carried with it was not only the Okinawan tradition of te / ti (手, the older vernacular for indigenous Okinawan fighting methods), but also Kanō’s modern budō format:
- Wearing a dōgi.
- Showing rank through a colored belt.
- Bowing in the dōjō.
- Learning through a graduated curriculum.
- Studying kata systematized into schools.
These are now the standard sights of karate practice worldwide. And in the long view, most of them can be traced back, directly or indirectly, to the modern budō format that Kanō Jigorō put in place for jūdō.
8. Conclusion: Karate as the “Cousin” of Judo
The provisional conclusion of this chapter can be stated simply. As technical content, karate and jūdō are different arts. As social and institutional realities, however, karate is best described as the cousin of jūdō.
Karate’s distinctiveness lies in its techniques and in the Okinawan tradition from which it descends. Its social form, however, owes a large part of itself to jūdō — or more precisely, to the modern budō format engineered by Kanō Jigorō. Modern karate history cannot be read without keeping both of these facts in view at once.
📝For readers new to the topic. Think of a modern school system. National curriculum guidelines, textbook accreditation, five-point grading, graduation certificates — these form an institutional mold, into which the content (Japanese, mathematics, science, English) is then poured. Kanō Jigorō built the institutional mold for budō. Karate is one of the “contents” that was poured into that mold. With this image in mind, the modern history of karate becomes much easier to follow.
Principal References
- Kanō, Jigorō (1932). The Contribution of Judo to Education. Lecture delivered at the University of Southern California. Reproduced via the Kōdōkan: https://kdkjudo.org/柔道の教育的価値
- Kanō, Jigorō (1989). Kanō Jigorō Taikei (嘉納治五郎大系, “Collected Works of Kanō Jigorō”). Tokyo: Hon-no-Tomosha.
- Tōdō, Yoshiaki (2007). Jūdō no Rekishi to Bunka (柔道の歴史と文化, “The History and Culture of Judo”). Tokyo: Fumaidō Shuppan.
- Nakajima, Tetsuya (2017). Kindai Nihon no Budōron (近代日本の武道論, “Discourses on Budō in Modern Japan”). Tokyo: Kokusho Kankōkai.
- Kinjō, Hiroshi (2011). Tōde kara Karate e (唐手から空手へ, “From Tōde to Karate”). Tokyo: Nippon Budokan.
- Tominakoshi (Funakoshi), Gichin (1922). Ryūkyū Kenpō Tōde (琉球拳法 唐手, “Ryukyuan Boxing Method: Tōde”). Tokyo: Bukyōsha.
- Kōdōkan. “The History of Kōdōkan Judo.” https://kdkjudo.org/history/
- Yanagihara, Shigeo (2022). “One Hundred Years of Karate Diffusion: From Tōde to Karate (Part 1).” WEB Daisan Bunmei. https://www.d3b.jp/npcolumn/13610
- Yokoyama, Kendō (2009). “Funakoshi Gichin’s Contribution to the Modernization of Karate, and a Cautionary Note.” Related materials, Waseda University Faculty of Sport Sciences. https://tokorozawa.w.waseda.jp/kg/doc/50_ronbun/2009/5007A016_abs.pdf