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2,142 open mats

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Saturday

6 of 2,209 sessions

22:30

– 23:00

Over Limit Chiba Sakura Jiu-Jitsu logo

Over Limit Chiba Sakura Jiu-Jitsu

Japan flag Chiba-city, Japan フリー練習

22:45

– 23:30

Prodigy Martial Arts logo

Prodigy Martial Arts

United States flag Blaine, United States

23:00

– 13:00

Jiu jitsu Studio logo

Jiu jitsu Studio

United States flag Los Angeles, United States

23:00

– 12:00

Frogtown Jiu–Jitsu logo

Frogtown Jiu–Jitsu

United States flag Los Angeles, United States

23:00

Kron Gracie BJJ West Monroe & Vital Fitness logo

Kron Gracie BJJ West Monroe & Vital Fitness

United States flag West Monroe, United States

23:00

– 13:00

UNA BJJ logo

UNA BJJ

United States flag Forest Hills, United States

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It's a mess, I know.

My goal is to build the most comprehensive BJJ encyclopedia anywhere — but good, accurate data is genuinely hard to come by. Records, gyms, belts and nationalities are pieced together from public and community sources, so some of it is incomplete, outdated, or flat-out wrong.

That's where you come in. If you spot something off, tell me and I'll fix it — every correction makes this better for everyone. This website wouldn't be possible without the community.