Joost is a Dutch martial artists who first came to UK in September 2001 to train at the South East London-based Institute of Karate and Perfoprming Arts (now MATS).
In January 2006 Joost was given an opportunity to take over an existing karate dojo in South East London after having assisted the Institute's chief instructor, Sensei George Andrews (8th Dan IOGKF) for some time at the honbu dojo. Joost jumped on the opportunity and ran the club until the gym where the classes took place was (partly) destroyed during the 2011 London riots and the classes came to an end.
In June 2009 Joost opened a dojo at the Central London-based Bloomsbury Fitness part of the University College London (UCL). The dojo ran under the International Ryukyu Karate Research Society (IRKRS) and became the first fully accredited Koryu Uchinadi Kenpo-jutsu club in the UK in 2010.
Inspired by old-style karate pioneer and KU founder Hanshi McCarthy's translation of The Bible of Karate: The Bubishi, Joost took up the study of Chinese medicine at the College of Chinese Medicine London (CCM London), receiving his Degree-level diploma in Chinese Medicine and BioScience in August 2010
In 2015 Joost was appointed the London-based representative and district manager (shibucho) for Koryu Uchinadi Kenpo-jutsu (KU) and the IRKRS.
Joost currently holds a 3rd Dan and shidoin-level instructor's licence in KU and is fully insured for his activities as a martial arts instructor under the British Combat Association.
He conducts regular first aid training courses in support of his instructor's licence, is DBS/CRB checked and has been teaching martial arts, including children's martial arts classes, since January 2006.