John Kleijn (6th dan) has been a judo teacher for over 40 years. After teaching for a number of associations, he founded the Benoordenhoutse Judoschool in 1994. His most important judo teacher was Jaap Hoogendam. In addition to being a judo teacher, he also works as a mathematics teacher. Currently at the Royal Conservatory, but previously at the Aloysius College, the Gymnasium Haganum, the HML and the private institute Vrijbergen.

Judo is a sport in which two people try to throw each other and hold them down on the ground. In Judo, you learn movement techniques that allow you to explore and develop your motor skills.

Judo is a widely known sport by now. Everyone has probably heard of Anton Geesink, Willem Ruska, Dennis and Elco van der Geest, Edith Bosch, Mark Huizinga, Kim Polling, and Noël van 't End. Judo is a sport for everyone from 2½ years old. It is not only a competitive sport but also a sport with a strong element of play.

Welcome to Cortez Boxing! Here you are guaranteed the best guidance and personal attention needed to help you reach your goals. Are you looking for certified trainers, a friendly atmosphere and good guidance? You're in the right place!

Tsuyoi is a self-defense gym located in Delft and Rijswijk! From young to old it doesn't matter, everyone is welcome. We try to keep it fun for every level. Our motto is not for nothing "everyone Budo"!

Tsuyoi is a self-defense gym located in Delft and Rijswijk! From young to old it doesn't matter, everyone is welcome. We try to keep it fun for every level. Our motto is not for nothing "everyone Budo"!