| Aikido Centrum Leiden | Regional Aikido centre |
| Dutch Aikikai Foundation | National Aikido association |
| Aikido Bond Nederland | National Aikido federation |
| Cercle Tissier | European Aikido centre, France |
| Aikikai Hombu Dojo | Aikido world headquarters, Japan |
Martin has been practising Aikido for about 30 years in different countries. He holds a fourth degree black belt (yondan) by the Aikido world headquarters Aikikai Hombu Dojo in Japan. He is a certified martial arts teacher with Aikido Bond Nederland.
Mark has been practising Aikido for about 15 years. He holds a third degree black belt (sandan) by the Aikido world headquarters Aikikai Hombu Dojo in Japan. He is a certified assistant martial arts teacher with Aikido Bond Nederland.
Ivo has been practising Aikido for about 10 years. He holds a first degree white belt (ichi kyu) by the national Aikido association Dutch Aikikai Foundation.