Origin of Judo's Belt System

Jigoro Kano founded judo's ranking system in 1882, awarding the first dan grade in 1883. He kept things simple at first — just white and black belts. White symbolized purity and an empty knowledge base, while black represented accumulated expertise. Colored belts didn't arrive until Gunji Koizumi introduced them in England in 1926. Mikinosuke Kawaishi then spread the system internationally through France in 1935. There's even more to this story than you'd expect.

Key Takeaways

• Jigoro Kano founded the Kodokan in 1882 and awarded the first official dan grade in 1883, establishing the earliest formal belt ranking system.
• Kano's original belt system was deliberately simple, using only white for beginners and black for advanced practitioners, symbolizing purity and accumulated expertise.
• The colored belt system wasn't invented by one person but evolved through contributors, with Gunji Koizumi introducing additional colors in England in 1926.
• Mikinosuke Kawaishi brought colored belts to France in 1935, introducing the deliberate sequence of white, yellow, orange, green, blue, and purple belts.
• Kawaishi's system spread globally, influencing martial arts like karate and Brazilian jiu-jitsu, which officially adopted colored belts around 1967.

How Jigoro Kano Built Judo's First Ranking System

When Jigoro Kano founded the Kodokan in 1882, he drew from Japan's 16th-century Menkyo reward method, which used certificates detailing the recipient's name, level, techniques learned, and training duration. Traditional systems relied on scrolls like mokuroku, menkyo, and kaiden as primary progression divisions, but they awarded these infrequently, limiting rank promotion motivation.

Kano restructured this by adopting the Dan system, enabling more frequent advancements and stronger development of progress markers. He initially separated practitioners into mudan-sha and dan grades, dividing beginners into three divisions: kô, otsu, and hei. He later refined these into six kyû levels, creating shorter, more achievable intervals between promotions. This design kept practitioners engaged and progressing consistently, transforming what was once an infrequent ceremonial reward into a structured, motivating advancement system you can still recognize in judo today. Kano awarded the first dan grade in 1883, marking the earliest official recognition of rank within his newly established system.

In 1886, Kano furthered this visual distinction by introducing the black belt to mark his senior Yudansha students, giving rank a recognizable physical representation for the first time.

Why Judo Started With Only White and Black Belts

Once Kano established his ranking framework, he kept the belt system deliberately simple: white for beginners and black for advanced practitioners. The symbolic meanings of color choices weren't arbitrary. White represented purity, equality, and an empty knowledge base, while black symbolized accumulated expertise and the polarity of opposites — In and Yo. Every student started equally, with no colors indicating social class.

The practical origins of belts also shaped this minimalist approach. Belts descended from wide obi that secured kimonos and held samurai swords. When the modern judogi arrived in 1907, only white and black obi accompanied it. No intermediate colors existed yet. This direct progression matched Japanese training culture, emphasizing long-term dedication over frequent visual rewards — a philosophy that defined judo's early identity before Western adaptations introduced additional colors. It was Gichin Funakoshi, the founder of karate, who later expanded the color spectrum by introducing yellow, orange, green, and blue belts.

Before Kano developed this belt-based approach, older Samurai martial arts relied on a Menkyo license system, which used certificates to denote rank rather than any outward physical display worn on the body.

Who Actually Invented the Colored Belt System?

Nobody invented the colored belt system in a single moment — it evolved through several contributors across different countries. Jigoro Kano started it with white and black belts as visible skill indications of proficiency levels in the late 1800s. Kodokan staff had already expanded the system by 1923, well before Western adoption.

Gunji Koizumi then introduced additional colored belts in England in 1926, using them at the Budokwai Display in London as advancement milestones for Western practitioners. When Mikinosuke Kawaishi brought the system to France in 1935, he didn't invent it — he carried what England had already established.

Kano's influence also extended well beyond judo, as he played a significant role in developing Japan's modern swimming programs, even awarding dan ranks to high-performing swimming students.

Before Kano introduced his belt system, martial arts progress was traditionally marked through certificates or scrolls awarded to practitioners to signify their advancement.

How Colored Belts Traveled From England to the World

How did a system born in a London judo club spread across the globe? It started when Mikinosuke Kawaishi visited London's Budokwai in 1928. He witnessed firsthand the importance of visible progression in keeping Western students motivated.

By 1935, he'd introduced colored belts to France, and his "Kawaishi Method" became an international benchmark.

From France, the system expanded rapidly across the martial arts world. Brazilian jiu-jitsu officially adopted colored belts around 1967, and aikido followed a similar path.

Long before the rise of instructional videos accelerated martial arts knowledge sharing globally, colored belts were already spreading organically through traveling instructors and growing judo communities. What Koizumi started in England had become the universal language of martial arts progression worldwide. The belt system itself was originally divided into kyu and dan grades, providing a clear and structured framework that made it easy for communities around the world to adopt and adapt.

The origins of this system trace back to the 1880s, when Jigoro Kano first devised the colored belt ranking system in Japan, laying the groundwork for what would become a global standard in martial arts achievement.

How Kawaishi Built the Modern Belt Ranking System

When Mikinosuke Kawaishi arrived in Paris in 1935 to teach judo, he didn't just bring his skills to the mat—he brought a structured vision for how Western students could best progress. Kawaishi's motivations for colored belt system design stemmed from a clear observation: Westerners trained better when they could see frequent, tangible progress. Japan's simple white-and-black model didn't offer that visibility.

Kawaishi's system for European students introduced a deliberate sequence—white, yellow, orange, green, blue, and purple—before brown and black. Each belt gave you a concrete milestone, keeping motivation high and retention strong. He'd likely drawn inspiration from what he'd seen at London's Budokwai around 1931, but he refined and formalized it into the structured model that would shape modern judo rankings worldwide. His influence extended far beyond judo, as other martial arts like karate adopted the same colored belt framework and kyu/dan ranking structure that Kawaishi had helped popularize in the West.

How Judo's Belt Ranking Shaped BJJ and Karate

Judo's kyū/dan structure didn't stay contained to the mat—it rippled outward, reshaping how Brazilian Jiu-Jitsu and Karate organized their own rankings. When you trace the Judo influence on karate kyu/dan development, you'll find Gichin Funakoshi directly borrowed Judo's descending kyū grades and ascending dan hierarchy for Shotokan Karate in the early 1900s.

BJJ followed a similar path, with Maeda and the Gracie family adapting Judo's framework toward ground-based combat, later adding blue, purple, and brown belts in the 1960s. However, differences in dan rank systems across martial arts do exist—BJJ extends its pre-black progression across more belt colors, Karate varies by style, and neither art enforces Judo's strict IJF standardization, giving each system its own distinct identity. In Judo itself, dan ranks are capped at 10 following the death of founder Jigorō Kanō, though the system was never formally limited to that number.

The grading system Kanō adopted actually traces back to a 17th century Go classification structure, which he repurposed to validate the technical and mental progress of judokas through both kyū and dan levels.