In 1940, he established the Japan Shiatsu College in Tokyo. Many of his graduates now practice in Japan and overseas. Some of these graduates have popularized their own styles, called Derivative Shiatsu, such as Tadashi Izawa of Meridian Shiatsu and Shizuto Masunaga of Zen Shiatsu. Namikoshi also established the Japan Shiatsu Association in 1947. He died at age 95 in 2000.