Piotr Masztalerz studies Aikido since 1988. He’s a 6 Dan Aikido Birankai Shidoin based in Poland. For those who don’t know Birankai is an association of Aikido Practitioners and Dojos founded by T. K. Chiba Shihan, forged by rigorous training, tempered by mutual respect, and committed to the relentless pursuit of the art.
There are only few direct O-Sensei disciples left alive and Yamada Sensei is one of them. This is one reason he is so respected and demanded. The other and even bigger reason is is his high aikido skill, unique style and colossal contribution to aikido.