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. 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.
From 1990, Miyawaki worked on restoring severely degraded tropical forests, including that of Bintulu (Sarawak, Malaysia). Thanks to sponsors, a seed bank of 201 tree species (mainly Dipterocarpaceae) from potential natural vegetation produced 600,000 seedlings in pots which were annually planted on site, under various conditions. In 2005, the surviving plants from 1991 (a major natural selection takes place, as is desired in the method) measured over 20 meters in height (growth of more than 1 metre per year) and the sedimentary facies of a young rainforest was reconstituting, protecting the soil, while fauna also was gradually reappearing.
In 2000, the Miyawaki method was tested for the first time in a Mediterranean ecosystem in Sardinia (Italy), on an area where traditional reforestation methods had failed. The original method was adapted while maintaining its theoretical principles. Results obtained 2 and 11 years after planting were positive: plant biodiversity appears very high, and the new coenosis was able to evolve without further operative support.
In 2013, the Miyawaki Method of Environment Forest Plantation was applied in the Barapani Industrial Area, Umiam, North East India.
In 2014, SayTrees switched to this method and using this method ever since, Bangalore, India.
In 2018, the Miyawaki Method was used also in Paris, by the boomforest.org team to restore a 400 m2 area near Porte de Montreuil, in the Boulevard Périphérique a controlled-access dual-carriageway ring road around the French Capital.
In 2019, GreenYatra planted around 3000 trees creating first Miyawaki of Mumbai city at the CRWC, Railway Land, Jogeshwari Mumbai. GreenYatra would plant 10,00,000 more trees switching to this method across India within 1 year.
On 5 June-2019, World Environment Day, IIT (Indian Institute of Technology) Ropar made the sacred forest of 550 trees of 40 native trees with this technique in a plot of 160 square metre. The forest was named after Guru Nanak Dev, the founder of Sikh religion.
Since 5th June 2019, AnarghyaaFoundation is creating Miyawaki Forest in rural areas of North Bangalore. Anarghyaa Foundation will be creating mini forests by planting 10 Lakh trees with Miywaki method across Karnataka within the next one year.
"Rather than scrap them, I want to bring memory objects back to life as earth resources - for the sake of repose of souls, and for the future."