JU-DO, which literally means "gentle way," was developed by the creator of JUDO and founder of the KODOKAN (1882), Prof. Kano. From the old JIU-JITSU, he extracted and adapted elements to make it possible for everyone to practice what he then called "judo." A few years later, Judo was recognized by the Japanese Ministry of Education and was taught in all Japanese schools. After 1938, students of Jigoro Kano were stationed in Europe. Kawashi (France), Koizumi (England), Hanna Rhi (Germany) were given the task of spreading JUDO. A few years later, JUDO became known in the Netherlands as well.

Why exactly practice budo sports at Budoschool Kai Sei? Because the offer of karate-do, competition karate up to top sport level for kumite, judo, competition judo, jiu-jitsu, kickboxing and competition kickboxing makes Kai Sei unique in the regions Haaglanden and the Green Heart. From Rotterdam to Amsterdam and the Scheveningen coast to Utrecht and maybe even a larger area there is no comparable officially recognized club to be found in defense sports/fighting sports.