Guida
Aokigahara Jukai is a vast primeval forest spanning the towns of Fujikawaguchiko and Narusawa in Yamanashi Prefecture. Situated northwest of Mt. Fuji, the forest developed over ancient lava flows from volcanic eruptions. The name "Jukai" (Sea of Trees) comes from the way the dense canopy looks like waves of an ocean when viewed from a distance. Designated as a National Natural Monument, it plays a vital role in the natural environment surrounding Mt. Fuji.
The history of this forest is relatively young, formed approximately 1,200 years ago. The unique landscape, shaped by the natural processes of volcanic lava flows, creates a striking visual experience. Furthermore, the area is part of the UNESCO World Heritage site "Fujisan, sacred place and source of artistic inspiration," making it a site of immense cultural and natural significance. It has long been regarded as a special place by both local communities and visitors alike.
In Aokigahara Jukai, you can observe the extraordinary geological formations created by lava flows and the diverse wildlife that thrives there. Key highlights include the unique way trees grow around the uneven volcanic terrain and the natural caves formed by the landscape. Additionally, scenic viewpoints like "Koyo-dai" offer breathtaking panoramic views where you can see the entire forest alongside Lake Saiko and Lake Motosu simultaneously.
The forest offers beautiful natural scenery throughout the year. While seasonal changes in plant growth and scenery occur, it is highly recommended to visit during periods suitable for hiking and nature walks. However, weather in the mountains can be unpredictable, so please be mindful of sudden changes. Visiting during daylight hours allows you to clearly observe the sunlight filtering through the trees and the intricate details of the forest.
To truly understand the depth of this ecosystem, we recommend participating in a "Nature Guide Tour" led by certified guides. There are two main types: "Scheduled Guide Tours" (approx. 1 hour), which can be joined on the day, and "Reserved Guide Tours" (1 to 3 hours), which allow you to customize your route in advance. These guides are officially certified by the local municipality, ensuring you receive accurate and professional knowledge. Exploring natural caves like Fugaku Wind Cave is also a valuable way to learn about geological formations.
Several fascinating spots are scattered around the forest. For instance, the Fugaku Wind Cave is a massive natural cave created by Mt. Fuji's lava flows; it remains cool even in summer and offers a glimpse into the world of lava shelves and ropey lava. Another must-visit is the Koyo-dai Observation Rest House, which provides a stunning vista of the Sea of Trees and the surrounding lakes.
Preparation is essential for a safe exploration. Please wear comfortable walking clothes, sturdy shoes, and a hat. For safety, carry your belongings in a backpack to keep your hands free while walking. Since mountain weather changes rapidly, always bring rain gear (raincoats/ponchos); however, using umbrellas is discouraged as they can be dangerous in the forest. To avoid attracting insects like hornets, avoid using strong perfumes or scented hair products. Finally, for your safety and environmental protection, always stay on the designated paths and never enter restricted areas.