As the Japanese Countryside Empties Out, Wildlife Is Disappearing

The Japanese countryside is experiencing a population decline, with the trend being particularly severe in rural regions. One might expect this loss of human inhabitants to foster a return of wildlife. However, surprisingly, where farms have become vacant, wildlife is also vanishing. Small farms nestled in the Japanese foothills have historically created diverse landscapes featuring rice paddies, open pastures, and scattered woodlands, offering habitats for a variety of species.

Human activities like cutting down trees for firewood and collecting leaves for fertilizer have paved the way for orchids and azaleas to flourish. Farmers who dug rice paddies inadvertently provided homes for rice fish and heike fireflies. Generally, many species coexisted on farms alongside humans. A 2025 Japanese study revealed that biodiversity remained stable only in areas where the population also remained steady.

In regions where the population declined, there was a decrease in the number of butterflies, fireflies, frogs, birds, and native plants. These trends in Japan echo similar patterns in other nations, such as Spain and China, where rural areas are depopulating as people migrate to cities for employment opportunities. Landscapes shaped by human hands are now being reclaimed by nature, but this often comes at a cost to species that relied on human care.

A recent study conducted in the Lake Constance region of the European Alps discovered that plant diversity reached its peak during the medieval period when small farms established a patchwork of fields, pastures, and forests that supported a wider array of plants than the dense forests that preceded them or the industrial farms that followed.

According to the study's lead author, Adam Spitzig, a PhD candidate at Stanford University, the key takeaway is that conservation efforts should not solely focus on agriculture or biodiversity. Instead, small, diversified farms that combine food production with biodiversity can both sustain and enhance the environment.