Inspired by Kamakura Budokan (public sports hall for martial arts in the Japanese city of Kamakura), Kochōkai makes use of this concept and restructures it for The Netherlands. In Kamakura Budokan, any practisioner can rent a spot on the mat for two hours in one of the dojo. He/she can train for himself/herself or with a group. In a spontaneous way groups and class are created and meet regularly to train.