I like a belt because it makes growth visible. Someone walks into a dojo as a beginner, practices for a while, and eventually a teacher says: you are ready for the next layer. The color marks work already done, and points toward work still ahead. That is a generous little idea.

The history is newer and messier than the belt might suggest. The International Judo Federation’s account of judo’s ranking system says Jigoro Kano developed ranks because the old gaps between recognitions could be too long to keep students motivated. Even the exact date of the belt system’s arrival is uncertain. The familiar range of student colors—from white through brown—came later, developing in England in the mid-1920s and spreading to France through Mikinosuke Kawaishi in 1935. A belt is not an eternal measuring stick passed down unchanged. It is a teaching tool people shaped.

That tool gets something right: growth needs landmarks. A vast practice can feel less mysterious when there is a next move to learn, a form to improve, or a small test to prepare for. A visible rank can help a student notice progress on the days when progress feels like doing the same thing again, only slightly less badly. (This is how many of us learn to fold a fitted sheet, too. Slowly. With witnesses.)

But a belt gets it wrong when we ask one colored strip to tell the whole story. It can show that a student met a school’s expectations at a particular time. It cannot measure every quiet thing that practice may be forming: patience under frustration, care for a partner, willingness to begin again after a mistake.

Judo’s own promotion practices are broader than color alone. The IJF describes teachers considering technical skill, competition or event participation, attendance, behavior, and respect for the art’s code. And a study in Japan’s Budo journal explains that, in the system it examines, promotion up to sixth dan draws on competition results and kata, while higher ranks weigh depth of knowledge and contribution to judo. Even the ranking system admits that progress has more than one dimension.

There is a familiar temptation here. We do it with report cards, job titles, savings balances, and habit streaks: let the marker stand in for the whole person. These measures can be useful when they help us keep practicing. They grow cramped when we treat them as proof of worth.

So what happened? A student earned a new color. What did it mean? They had reached a real milestone, not the end of becoming. What can I carry forward? Celebrate the marker, then ask what the practice is making possible: more skill, yes, but also more attention, steadiness, and generosity. The belt is a map. The person is still walking.