Xavier Boulanger

4th dan

Xavier started Judo at the age of 10, as the minimum age required for the practice of karate was 14 years old back then in France. As soon as he reached 14 years old he switched to karate and never looked back.

In 2000 he qualified as a Karate instructor in London where he also studied Taekwondo extensively for over 4 years.

With over 26 years of experience as a Martial Artist and 13 years experience as a Karate Instructor, Xavier has trained in France, England, Japan, USA and with the best instructors the world has to offer including Masters such as Okazaki, Kanazawa, Miura, Yaguchi, Ochi, Takahashi, Ohta, Jean-Pierre Fisher, A. Moussaoui… as well as the legendary Wayne Otto (9 times World Champion).

He joined the world famous karate Federation JKA (Japan Karate Association) in 2000 which ISKF was part of until they became independent in 2007.

He currently trains and teaches at ISKF UK headquarters (Sobell Honbu Dojo) in Finsbury Park and is part of the ISKF National Squad representing ISKF UK in national and international competitions.

Xavier continues to attend seminars on a regular basis to extend his knowledge to ensure his classes are of the highest quality and in the safest environment.

MAFCUK (Martial Arts & Fitness Coach UK) registered & insured instructor, enhanced CRB checked.

REPs (Register of Exercise Professionals) registered & YMCAfit qualified Personal Trainer.

 Nao Masuda

 2nd Dan

Nao was born in Nara city, the ancient capital of Japan filled with temples of different denominations and eras. Our club has been named after a conception (Yui-Shin) she learned through her visits to Todai-ji, one of the oldest and most revered temples in the region.

Since she first started practicing Karate in 2000, she has also been researching and studying its history and spiritual teachings to deepen her understanding of the art.

In 2009 she co-founded Yui-Shin Karate Club and has been assisting and leading both children and adults classes since the very first day.

Nao is one of the first students of Xavier, and has also trained with Grand Master Yutaka Yaguchi, Sensei Hiroyoshi Okazaki, Sensei David Jones, Sensei Jean-Pierre Fisher, and Sensei Ascene Moussaoui in various seminars.

MAFCUK (Martial Arts & Fitness Coach UK) registered & insured instructor, enhanced CRB checked, Level 1 Child Protection, First Aid certified.