Cities around the world face common challenges. As population growth and development intensify, urban areas become hotter, noisier, and increasingly disconnected from nature. Concrete surfaces absorb heat, biodiversity declines, and green spaces often struggle to keep up with expansion. To this end, Japan’s first unconventional reforestation method is attracting global attention. Known as the Miyawaki method, it transforms small parcels of land into dense native forests capable of supporting wildlife, improving local environmental conditions and restoring lost fragments of the ecosystem. From Tokyo, where the technology was first developed, to Delhi, where microforests are now popping up in crowded neighborhoods and industrial areas, Miyawaki forests have become part of a wider international movement to bring nature back to cities.
How a Japanese botanist inspired the world’s fast-growing urban rewilding movement
The story begins with Japanese botanist Akira Miyawaki, whose research focuses on understanding what he calls “potential natural vegetation” (PNV). Rather than studying forests as isolated collections of trees, Miyawaki studied how native plant communities naturally organize themselves over time.His work reveals that many modern landscapes have lost the ecological complexity that once defined them. Native forests have been replaced by monoculture plantations, ornamental species and strictly managed green spaces. Miyawaki believes ecological restoration should focus on rebuilding native forest communities rather than simply increasing the number of trees.In a 2004 paper’Restoration of human settlements based on vegetation ecology: theory and practice,” who described the restoration of native forests as one of the most important ecological challenges of modern times. His approach includes identifying local native species, improving soil conditions, and planting diverse vegetation at extremely high densities to accelerate the development of natural forests. This method eventually spread beyond Japan.Today, Miyawaki forests are found throughout Europe, Southeast Asia, South America, North America, and Africa. Municipalities, conservation groups, schools and businesses are adopting the technology as part of wider efforts to improve urban biodiversity and climate resilience.
How is Miyawaki Forest different from traditional plantations?
At first glance, Miyawaki Forest appears extremely crowded. Unlike traditional plantations, where trees are often planted several meters apart, Miyawaki forests plant saplings closely together, typically at a density of three to five plants per square meter. The goal is not aesthetic landscape but ecological reconstruction.The process begins with identifying species native to a specific area. Depending on the site, these may include canopy trees, smaller sub-canopy species, shrubs and ground vegetation. Once planted, the dense arrangement encourages competition for sunlight, driving rapid vertical growth while establishing a complex root network beneath the soil.The method aims to replicate the layered structure found in natural forests. Because multiple species occupy different ecological niches, the resulting habitat is often more diverse than traditional urban plantations.Proponents of the approach argue that these intensive plantings can create well-functioning ecosystems within decades, whereas under natural conditions this process may take much longer.
Why cities around the world are embracing Urban Micro Forest
The rapid spread of Miyawaki forests is closely related to the environmental pressures faced by modern cities.according to Theodore Ndreni Researchers from the State University of New York’s ESF Department of Environmental Resources Engineering say urban heat islands have become a growing concern on every continent. Buildings, roads and paved surfaces absorb solar radiation during the day and slowly release it at night, causing cities to be much warmer than surrounding rural areas.At the same time, the loss of biodiversity in urban environments is becoming increasingly apparent. Pollinators, birds and small mammals often struggle to survive in fragmented habitats dominated by concrete infrastructure.For urban planners, Miyawaki forests have a practical advantage: They require relatively little space.Vacant lots, abandoned industrial sites, roadside corridors and former dumpsites can all be transformed into dense green spaces. In communities where large parks are not possible, microforests offer an opportunity to introduce native vegetation without acquiring large amounts of land.This flexibility explains why the technology has attracted attention from cities with very different climates and development patterns.
From Europe to Asia : The place where Miyawaki Forest took root
In the Netherlands, environmental groups have established many small forests inspired by Miyawaki principles, often integrating them into schools and community spaces. Similar projects have emerged in France, Belgium and the UK, where urban biodiversity restoration has become an increasingly important policy goal.In Southeast Asia, rapidly urbanizing cities have adopted the technology as a way to increase green coverage in densely populated areas. according to Singapore University of TechnologySingapore is recognized for its extensive urban greening programme, which incorporates biodiversity-focused planting strategies that share some common principles with Miyawaki’s philosophy of ecological restoration.Across Latin America, local governments and community groups have begun experimenting with urban microforests as part of climate adaptation initiatives aimed at mitigating heat stress and improving environmental quality.The technology’s global appeal lies in its adaptability. Although species composition varies from country to country, the basic principle remains the same: restore native ecosystems rather than simply plant trees.
How India became one of the world’s great powers The world’s largest adopter of Miyawaki forest
Few countries embraced the Miyawaki method with as much enthusiasm as India. Faced with rapid urbanization, deteriorating air quality, and shrinking green space coverage, cities across the country are increasingly turning to microforests as a practical restoration tool.Delhi has used Miyawaki technology to establish several urban forests, including projects in densely populated settlements and industrial areas. Native species such as neem, jamun and mango have been planted to enhance local biodiversity while increasing the green cover of the city.Similar initiatives have been launched in Mumbai, Pune, Bengaluru, Chennai, Hyderabad and Bhubaneswar, often converting degraded land into dense native forests.One of the most ambitious recent examples came in Prayagraj ahead of Mahakumbh 2025. Ministry of Environment, Forests and Climate Changecreating approximately 56,000 square meters of Miyawaki forest in multiple locations. The former dump site was restored and replanted with thousands of native, medicinal and fruit trees.One major project in Naini Industrial Area alone involves about 120,000 trees representing 63 species. Government officials described the move as part of a broader effort to improve air quality, increase biodiversity and create a greener urban environment for residents and visitors.These projects demonstrate how Miyawaki forests developed from small experimental plantations to become an integral part of mainstream urban environmental planning.
Do Miyawaki forests really bring environmental benefits?
As the technology spreads around the world, researchers are increasingly seeking to evaluate its ecological performance.A 2025 study titled “Assessing carbon sequestration in urban Miyawaki forests in southern India: implications for climate mitigation planning and land suitabilityexamined the Miyawaki urban forest in southern India and found that biomass and carbon storage increased significantly as the forest matured. Five-year-old forests store approximately four times more carbon than two-year-old forests, suggesting that carbon sequestration can accelerate rapidly during early growth stages.Researchers at the Center for Environmental Science and Sustainable Engineering (ESSENCE) at the Indian Institute of Technology, Palakkad, have concluded that Miyawaki forests can help mitigate urban climate change while also supporting ecological restoration efforts. Their analysis further suggests that large tracts of marginal land in India may have climate conditions suitable for similar interventions.In addition to carbon storage, there is growing interest in the biodiversity potential of Miyawaki forests. Dense native vegetation can provide habitat for insects, pollinators, and birds that often struggle to find shelter in highly developed urban environments.However, scientists also warn against exaggeration. Microforests cannot replace large natural forests, nor can they solve all urban environmental challenges. Their effectiveness depends largely on species selection, quality of maintenance and local ecological conditions.
The future of rapidly growing urban forests in a warming world
The popularity of Miyawaki Forest reflects a broader shift in how cities view nature. For much of the twentieth century, urban greening was primarily concerned with aesthetics. Trees are planted to beautify streets, parks are designed for recreation, and landscaping often prioritizes appearance over ecology.Today, cities increasingly view green spaces as critical infrastructure. Forests, wetlands and native vegetation are recognized for their role in cooling communities, supporting biodiversity, improving public health and building resilience to climate change.Miyawaki Forest emerged as a response to this challenge. They are not a one-size-fits-all solution and are not a substitute for large-scale protection. Yet their ability to transform neglected urban lands into vibrant ecosystems has made them one of the most influential rewilding experiments of the twenty-first century.From Tokyo, where the concept was born, to Delhi and beyond, these lush native vegetation show that nature can still reclaim its place even in the world’s most crowded cities.
