Guide
Aokigahara Jukai is a stunning primeval forest spanning the areas of Fujikawaguchiko Town and Narusawa Village in Yamanashi Prefecture. Located northwest of Mt. Fuji, this forest developed atop ancient lava flows from volcanic eruptions. The name "Jukai" (Sea of Trees) comes from the way the treetops appear to undulate like ocean waves when viewed from a distance. Designated as a National Natural Monument, this forest plays a vital role in the natural ecosystem of the Mt. Fuji area.
The forest is relatively young in geological terms, with a history of approximately 1,200 years. Its unique landscape was sculpted by the natural processes of volcanic activity. Furthermore, the area is part of the UNESCO World Heritage site "Fujisan, sacred place and source of artistic inspiration," making it a significant cultural and natural landmark for both locals and visitors.
In Aokigaki Jukai, you can observe the extraordinary topography formed by lava flows and the diverse wildlife that thrives within it. Highlights include the unique way trees grow around volcanic rock formations and the natural caves created by the landscape. For a spectacular view, visit lookout points like "Koyodai," where you can see the vast expanse of the forest alongside Lakes Saiko and Motosu.
Aokigahara Jukai offers beautiful natural scenery throughout the year. While the seasonal changes in plant life are striking, it is best to visit during periods suitable for hiking and nature walks. Because mountain weather can change rapidly, always be prepared for sudden shifts. Visiting during daylight hours allows you to fully appreciate the sunlight filtering through the canopy and the intricate details of the forest.
To deepen your understanding of this ecosystem, you can join a professional "Nature Guide Tour." Options include "Scheduled Tours" (approx. 1 hour) that can be joined on the day, and "Reserved Tours" (1–3 hours) where you can customize your route in advance. These tours are led by certified guides who provide expert knowledge. Additionally, exploring natural caves like the Fugaku Wind Cave offers a fascinating look at volcanic formations.
Several remarkable spots surround the forest. The Fugaku Wind Cave, for example, is a massive natural cave formed by Mt. Fuji's lava flows; it remains cool even in summer and showcases incredible lava structures. Another must-visit is the Koyodai Observation Rest House, which offers a breathtaking panoramic view of the forest and the surrounding lakes.
Proper preparation is essential for a safe and enjoyable walk. Wear comfortable clothing, sturdy walking shoes, and a hat. To keep your hands free for balance, carry your belongings in a backpack. Since mountain weather is unpredictable, bring rain gear (but avoid using umbrellas, as they can be unsafe in the forest). To avoid attracting insects like hornets, avoid wearing strong perfumes or scented hair products. Most importantly, always stay on the designated trails and never enter restricted areas to protect the environment and ensure your safety.