Kasoyama Shrine: A Sacred Mountain Shrine Surrounded by Forests in Kanuma

A Historic Shrine Surrounded by Nature

Nestled in the mountains of Kanuma, Tochigi, Kasoyama Shrine (加蘇山神社) stands at the foot of Mount Ozaku, a mountain that has long been associated with mountain worship.

The shrine is dedicated to Iwasaku-no-Mikoto, Ne-saku-no-Mikoto, and Takemikazuchi-no-Mikoto, and is traditionally regarded as a shrine of agricultural abundance and martial valor. According to shrine tradition, the mountain was opened by the Buddhist monk Shodo Shonin during the Jingo Keiun era in the 8th century.

Surrounded by towering trees and the sounds of the mountain landscape, Kasoyama Shrine offers visitors an opportunity to experience a quieter side of Japan’s religious and natural heritage.

⛩️ Highlights of Kasoyama Shrine

1. Senbon Katsura — A 1,000-Year-Old Sacred Tree

One of the most remarkable features of Kasoyama Shrine is Senbon Katsura (Thousand-Trunk Katsura), located along the trail to the shrine's inner sanctuary.

The name refers to two large katsura trees standing close together. The trees are estimated to be around 1,000 years old and are designated as a Natural Monument of Tochigi Prefecture. Their trunks have produced numerous smaller stems near the base, creating an impressive mass of intertwined growth.

The two trees have long been revered as sacred trees associated with enmusubi, or the bringing together of people and relationships. They are also known as the “Enmusubi Katsura,” making them one of the highlights of the mountain trail.

2. A Forest of Ancient Trees

The shrine grounds are surrounded by impressive trees that have long been revered as sacred.

Three large Japanese cedar trees within the shrine grounds are designated as natural monuments by Kanuma City. They are estimated to be approximately 500 to 800 years old, with the tallest reaching more than 50 meters.

Walking among these towering trees and along the mountain paths creates a peaceful atmosphere, while also offering a glimpse into the close relationship between nature and religious practice in Japan.

3. The Arai River and Mountain Streams

The Arai River originates from a large waterfall upstream in the Kamikuga Yorikuri area and flows for approximately 18 kilometers before joining the Oashi River.

The clear mountain waters are enjoyed for mountain stream fishing and ayu (sweetfish) fishing, and the upper reaches of the river are located near Kasoyama Shrine and Senbon Katsura.

The river and surrounding mountain landscape add another dimension to a visit to the shrine, where the natural environment is an important part of the experience.

4. Follow the Mountain Trail to the Inner Sanctuary

Kasoyama Shrine is also the starting point for a mountain trail leading toward the inner sanctuary and Mount Ozaku.

The route passes Senbon Katsura, continues toward Nakanomiya, and eventually reaches Okunomiya and Mount Ozaku. The official Kanuma City route information describes a circular mountain course that takes in Mount Ozaku and Mount Gassan.

This is more than a simple walking path. Beyond Nakanomiya, the trail includes ladders, steep slopes, and a chain section of approximately 20 meters. Visitors planning to continue into the mountain should therefore prepare appropriately for a genuine hiking route.

✨ Experience the Sacred Mountain Landscape of Kanuma

Kasoyama Shrine offers a fascinating combination of history, mountain worship, ancient trees, and natural scenery.

🌳 Senbon Katsura, a 1,000-year-old sacred tree designated as a Natural Monument of Tochigi Prefecture
🌲 Historic cedar trees standing within the shrine grounds
🏔️ A mountain trail leading toward the inner sanctuary and Mount Ozaku
🎣 The Arai River, known for mountain stream and ayu fishing

Away from the major tourist centers, Kasoyama Shrine provides an opportunity to encounter a quieter landscape where the shrine, mountains, forests, and streams are closely connected.

For travelers interested in Japan's traditional religious culture and mountain scenery, a visit to Kasoyama Shrine offers a memorable glimpse into the enduring relationship between nature and faith in Kanuma, Tochigi.