Underhook Society

Welcome to Underhook Society, the school for Brazilian Jiu Jitsu (BJJ) and Grappling in Leiden and Lisse. Whether you want to learn to fight, improve your self-defense skills, or train for competition, you are at the right place. Our training is led by experienced coaches in a safe and respectful environment, suitable for both beginners and advanced practitioners. Brazilian Jiu Jitsu focuses on technique, timing, and control rather than brute strength, making it ideal for self-defense and fitness. Join us and discover why Brazilian Jiu Jitsu is so popular worldwide, whether for fitness, confidence, or competition.