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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 ...

Tegumi: The Foundation of Shima – Okinawan Sumo!

In connection with this article, it is recommended to read these two articles first: Tegumi and Shima - Okinawan sumo. Tegumi: The Foundation of Shima - Okinawan Sumo! In the realm ...

Ten Precepts of Karate

In October 1908, Anko Itosu (1831-1915) wrote a letter, "Ten Precepts of Karate," to draw the attention of the Ministry of Education and the Ministry of War in Japan. This ...