Lineage Our teachings can be traced all the way back to the original Gracie family. Through this lineage you can be assured your instruction is as pure as learning it right from the very source it was created. Len Sonia 3rd Degree Brazilian Jiu Jitsu Black Belt and owner of Dojo1 Martial Arts Academy Ken Kronenbergen 4th Degree Brazilian Jiu Jitsu Black Belt and owner of Tai Kai Jiu Jitsu Affiliates