Okada soon expanded to open a rehabilitation center centering on the healing powers of light, but it was shut down in 1936 as a violation of the Medical Practitioners" Law (医師法違反). The Sangetsu (山月) school of ikebana, inspired by Mokichi Okada, was founded in June 1972. The Mokichi Okada Association (MOA) was established in 1980 to continue his work "toward the creation of a new civilization to be undertaken without confining Okada"s principles and their implementation within a religious framework" (MOA acquired a status of a legal entity as Limited Liability Intermediary Corporation in 2005, then transferred to one of general Corporation in 2009, officially called MOA International Corporation).
Much of Okada"s extensive art collection is now housed in the MOA Museum of Art in Atami, Japan.
In 1936, Okada established an agricultural system originally called, "no fertilizer farming" or "". Offshoots such as the Sekai Kyusei Kyo, promoting ‘Kyusei nature farming’, and the Mokichi Okada Association formed after his death to continue promoting the work in Japan and South-East Asia.
According to the International Research Center in Nagano, Japan, it is based on the theories that:
Fertilizers pollute the soil and weaken its power of production
Pests would breakout from the excessive use of fertilizers
The difference in disease incidence between resistant and susceptible plants is attributed to nutritional conditions inside the body. Vegetables and fruits produced by nature farming taste better than those by chemical farming.