Xatzivei Club was founded in 2001 with instructor sensei Taki Mersini, (4 dan), personal student of the Head of the Organization in Europe kyoshi Babis Polychronopoulos (7 dan).
The training is taking place in the Gymnastics Room of the Xatzivei School. The students of the Xatzivei Club are taught Shorin ryu karate do, Matayoshi kobudo and Suikendo.
The Hombu Dojo, or simply put, “Main” Dojo, is the actual place where the instructors of the organization are trained and developed. It’s where the family – or ryuha – gathers. It’s where the foundations of the “do” come to life. The dojo sets the foundation for the development and the training of instructors.
The N.T.U.A club was established by kyoshi Polychronopoulos in 1988 and since then, it has become of the most noted university karate clubs. The main factors that contributed to the success of the N.T.U.A. club were: Kyoshi's experience with the Univeristy of Michigan Karate club as head instructor from 1977 until 1983, his personal academic level of education at the same University in the fields of Aerospace Engineering and Biomechanics, and the invaluable support of Mr. Dionysios Markatis, N.T.U.A.'s Head of Athletics.