Overview
Kasuga Primeval Forest (Kasugayama Genshirin) is a UNESCO-protected ancient forest covering 250 hectares on the hillside behind Kasuga-taisha shrine. A logging ban imposed over 1,000 years ago has allowed this forest to develop into a pristine, old-growth ecosystem unique in a populated area of Japan.
Highlights
- Virgin Forest: Over 175 tree species and 60 bird species thrive in this ancient forest, which has been untouched by logging since 841 AD — over 1,100 years of continuous natural growth.
- Giant Trees: Centuries-old cryptomeria cedars, camphor trees, and Japanese oaks tower overhead, with some trunks exceeding 10 meters in circumference.
- Atmospheric Trails: Walking paths wind through the forest, offering a profound sense of wilderness an astonishing five minutes' walk from central Nara.
History
In 841 AD, tree-felling on Kasuga Mountain was officially prohibited as the mountain was considered sacred to the shrine deities. This ban has been maintained for over a millennium, making it one of the world's earliest examples of deliberate nature conservation.
Visitor Tips
- Trail Options: The main Kasugayama Primeval Forest trail (Yuen-yama hiking course) takes approximately 90 minutes. Wear proper walking shoes and bring water.
- Wildlife: Listen for Japanese green woodpeckers, Eurasian jays, and mandarin ducks. The forest is also home to flying squirrels, though they are nocturnal.
- Duration: 1.5–2 hours.