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Gert Corfitzen Jürgensen

Hi, I’m Gert Corfitzen Jürgensen

Martial Arts Researcher
Author and Blogger

Jissen Karate

To search for the old!

Gichin Funakoshi once said: "To search for the old is to understand the new. The old, the new, this is a matter of time. In all things, man must have a ...

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 ...

Shurijo Castle, Ryukyuan History and Cultural Heritage

Shurijo Castle, located in Naha, the capital city of Okinawa Prefecture, Japan, stands as a testament to the rich history and cultural legacy of the Ryukyu Kingdom. Over its existence ...