In actuality, Kampo was initially developed as far back as the early 200s B.C. Kampo history is absolutely fascinating and there is a lot of literature out there with some incredible facts and pictures. The introduction of Kampo to Japan arrived primarily during the 7th and 9th Centuries A.D. It was during this time that the "Guide" to herbal medicine and other holistic theories of treatment from China, were compiled, edited and released under the name, ISHIMPO, in Japan.
During the last 25 years the Japanese Ministry of Health formally approved of the usage of these traditional Chinese herbal formulae, along with similar formulae based and developed in Japan, with the government's pride of strict quality control.