Otake Risuke Minamoto-no-Takeyuki was born in Daiei, Katori district, Chiba prefecture in 1926. In 1942, he entered Katori Shinto-ryu as a student of Hayashi Yazaemon Shihan. His goal, during this time of war, was to acquire the frame of mine required of a soldier serving on the frontline. However, World War II ended the year he was to be sent to the front, and he has thus been able to continue his training within the school for more than sixty years.
In 1960, Tenshinsho-den Katori Shinto-ryu was designated an Intangible Cultural Asset in Japan. The three government-designated guardians of the school were Iizasa Yasusada, soke of the ryu, Hayashi Yazaemon Shihan, and Otake Risuke Shihan. He was concurrently awarded the gokui kaiden and designated to be the next master teacher of Katori Shinto-ryu. Otake Risuke Shihan is the only person to have received the gokui kaiden from Iizasa Yasusada Soke and Hayashi Yazaemon Shihan, and he is currently the sole shihan of the school.
In 1964 he opened the Shinbukan Dojo and has worked to correctly transmit to several hundred students the technical and philosophical teachings of this nearly six-hundred-year-old tradition. He authored the three-volume series The Deity and the Sword: Katori Shinto-ryu in 1977, and hosted the 600th Anniversary of the Birth of Founder Iizasa Choisai Commemorative Festival in 1987. He has also participated in countless domestic and overseas demonstration, televison appearances, written magazine articles, and created choreography for televison and films. For the past thirty years he has served as a Chiba Prefectural Japanese sword and antique firearms inspector. His work has also been recognized through awards such as commendations from the Education Ministry for service to regional culture and the Order of the Rising Sun, Twin Rays.
At present, the guardians of the school’s intangible cultural asset designation are Iizasa Yasusada Soke, Otake Risuke Shihan, Otake Nobutoshi, and Kyoso Shigetoshi. Today father and sons are based at the Shinbukan Dojo and train students domestically while also appointing shidosha instructors for several overseas countries, thus working towards the correct transmission of Tenshinsho-den Katori Shinto-ryu.