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Gert Corfitzen Jürgensen

Hi, I’m Gert Corfitzen Jürgensen

Martial Arts Researcher
Author and Blogger

Jissen Karate

The history of the black belt

The history of martial arts belts, particularly the black belt and the introduction of colored belts, encompasses various stories and influences that have shaped the ranking system we know today ...

Tsumasaki-geri

Tsumasaki-geri is a kick with the tip of the toes. Some would argue that this is the right way to kick (the old way of Okinawan kicking), compared to our ...

The Bubishi – Part 1

Bubishi - The classic manual of combat. The origin of the Bubishi. The Bubishi is a classical Chinese martial arts manual that holds significant importance in the realm of Okinawan ...