Mission The Mission of the Jinenkan Kōsei Gōgi Dōjō in Mahopac, New York is to teach and preserve the authentic Warrior Arts of Japan defined by a long heritage of realistic combat. These classical martial systems are referred to as Jissen Kobudō and are studied at our Dōjō by committed students of all ages and backgrounds. Company Overview The Jinenkan Kōsei Gōgi Dōjō located in Mahopac, New York and is one school within an international network of schools in eight countries preserving the traditional arts of the Jinenkan. Developed by Retired Lieutenant Colonel Fumio Manaka, the international Jinenkan organization is a complete martial art system characterized by it’s traditions of authentic Kobudō, the classical fighting forms of Japan’s Samurai. In a safe, traditional environment students train in the un-armed combative methods of classical jūjutsu, samurai weaponry and sword discipline.