Jan Plas
 Jan Plas (1945-2010) was a Dutch former professional kickboxer trainer and founder of the Mejiro Gym in Amsterdam. He is considered to be the father of kickboxing in The Netherlands. Plas began his career in martial arts in karate learning Kyokushin from Jon Bluming. He founded the Mejiro Gym in 1978 after learning kickboxing from Kenji Kurosaki a Japanese martial artist who founded the original Mejiro Gym in Mejiro Tokyo.