An independent jiu-jitsu academy in Oslo
Our story
The academy is built around consistent training, technical depth and a strong team culture. We value good training habits, attention to detail, and a room where people train with intent.
Beginners are guided from the first session, and experienced students keep refining their game.
Founder & head coach
Mikolaj Mazur
Competition highlights
IBJJF European Championship
Bronze — brown belt (2025)
Silver — purple belt (2020)
Bronze — blue belt
IBJJF Pan American Championship
Bronze — brown belt
Open tournaments
Gold — New York Open
Gold — Atlanta Open
Gold — London Open
National
Multiple-time Polish national champion
Black belt, Unity Jiu-Jitsu
My name is Mikolaj, and I've been training martial arts for 15 years. I started in MMA, but it was the ground fighting that kept me. I trained jiu-jitsu for five years at Unity Krakow before moving to Oslo, where I began competing internationally.
In 2018 I made my first trip to New York to train at Unity Jiu-Jitsu under Murilo Santana. I returned regularly, sometimes for months at a time, and joined Unity's training camps before the World Championships.
Those years shaped how I think about jiu-jitsu, and about what a good training room should be. I received my black belt from Unity Jiu-Jitsu and have competed extensively in Europe and internationally, including at the IBJJF European, World and Pan American Championships.
I started Jiu-Jitsu Collective to build the kind of place I was lucky to train in: serious about the training, easy to become part of, and built around good coaching. I plan and teach every class, and I want JJC to be a place where people can train consistently, improve, and enjoy being on the mats.
Jiu-jitsu is built through consistent training over time. Progress comes from showing up, paying attention, and refining details.
Strong jiu-jitsu is built on fundamentals. Structure, balance, and control come before complexity.
The standard on the mats matters. How we train, treat our partners, and approach the practice defines the room.
Jiu-jitsu is an individual pursuit trained collectively. Progress happens through focused training with others.
The academy is a place to start, to continue, and to keep improving. Beginners and experienced practitioners train side by side.
Org. no. 936 412 629.