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Belts and ranks

How grading works in each art, side by side. Only arts with a system confirmed by a source are listed; lower-grade colours often change from school to school.

Art	Colours	System	Source
Judo		Kyu grades (6th to 1st) then dan grades (1st to 10th). Kodokan: black 1st–5th dan, red-and-white 6th–8th, red 9th–10th. Coloured kyu belts vary by country.	Kodokan Judo Institute ↗ IJF ↗
Karate		Kyu then dan (1st–10th). Colours depend on style and school; a common order is white, yellow, orange, green, blue, brown, black.	World Karate Federation ↗
Kyokushin		Ten kyu then dan. Typical order: white, orange, blue, yellow, green, brown, black.	IKO Kyokushinkaikan ↗
Taekwondo		Ten geup (coloured belts, chosen by each school) then dan 1st–9th (Kukkiwon). Under 15, juniors get poom (red-and-black belt) instead of dan.	Kukkiwon ↗
Brazilian Jiu-Jitsu		Adults: white, blue, purple, brown, black (degrees 1–6), red-and-black (7th), red-and-white (8th), red (9th–10th). Kids: grey, yellow, orange, green.	IBJJF — graduation system ↗
Aikido		Kyu grades usually on a white belt; black belt (and often the hakama) from 1st dan. Aikikai dan grades go up to 8th.	Aikikai Foundation ↗
Hapkido		White, grey, yellow, orange, green, light blue, dark blue, brown, red-and-black, then black belt 1st–10th dan (order used by many schools).	aidobonsai.com — Hapkido ↗
Kendo	—	No belts. Grades are kyu then dan 1st–8th, plus teaching titles renshi, kyoshi and hanshi.	All Japan Kendo Federation ↗
Sumo	—	No belts. Professional sumo has six divisions: makuuchi, jūryō, makushita, sandanme, jonidan and jonokuchi. At the top of makuuchi: yokozuna, ōzeki, sekiwake, komusubi and maegashira.	Japan Sumo Association ↗ Wikipedia ↗

Kyu/geup = student grades (count down); dan = black-belt grades (count up).