Miyawaki has instructed people on planting in over 1,700 areas around the world, including over 1,400 sites in Japan as well as in Borneo, Amazonia and China.[1] He has been involved in the planting of over 40 million native trees, together with companies and citizens, to contribute to forest regeneration. Since 1978, Miyawaki has contributed to vegetation surveys in Thailand, Indonesia, and Malaysia.[1]