Mount Hayama is a 1,462-meter-high mountain located on the borders of Sagae City, Murayama City, and Okura Village in Yamagata Prefecture. Known as a mountain of ascetic practice since the Nara period, it was once counted as one of the Three Mountains of Dewa, together with Mount Gassan and Mount Haguro.
Mount Hayama has long been revered throughout a wide area of the Tohoku region. Today, however, it is also affectionately known by local residents as their “mountain of the people”. With several well-maintained hiking trails, it is a popular destination for enjoying the rich natural surroundings on foot.
One of Mount Hayama’s greatest attractions is its changing scenery throughout the seasons, together with the spectacular views available from near the summit. Fresh green foliage covers the mountain in spring and early summer, while colorful autumn leaves transform the landscape in fall.
The views from the summit and Okunoin Inner Shrine are particularly impressive. On a clear day, visitors may be able to see all six of the mountains in Yamagata Prefecture that are designated among Japan’s 100 Famous Mountains: Mount Gassan, Mount Oasahidake, Mount Chokai, Mount Zao, Mount Iide, and Mount Azuma.
Mount Hayama is also included among the 100 Famous Mountains of Tohoku and was selected as one of the “100 Famous Mountains of Yamagata” in 2016. Its combination of rich natural scenery and panoramic mountain views makes it a rewarding destination for hikers.
Mount Hayama is a Tertiary stratovolcano located in the Dewa Mountains. It was once classified as a Quaternary volcano, but K-Ar dating later established its classification as a Tertiary volcano.
Although volcanic activity has long ceased, traces of its volcanic past remain. Two explosion craters can still be found near the summit.
The mountain is also rich in plant life, with extensive beech forests reaching close to the summit. At higher elevations, visitors can encounter alpine plants, while wetlands near the summit provide opportunities to observe seasonal wildflowers and other vegetation.
The Okunoin Inner Shrine, also known as Hayama Shrine, stands at the summit. As a place associated with the mountain’s ancient religious traditions, it provides an opportunity to experience the history of mountain worship while hiking.
A first-order triangulation point is also located at the summit. Together with the panoramic views, it provides another destination for hikers reaching the top of Mount Hayama.
Mount Hayama has been revered across a broad area of the Tohoku region as a sacred mountain. This tradition is known as Hayama worship, and the mountain is also written as “Hayama” using characters associated with the names Habayama or Hayama.
These names are traditionally associated with the idea of a mountain located relatively close to human settlements. Mount Hayama was believed to be home to a deity of agriculture, and local people would climb the mountain at important points in the agricultural calendar to pray for abundant harvests.
These traditions illustrate the close relationship that once existed between the mountain environment and the daily lives of farming communities.
Mount Hayama in the Murayama region is traditionally said to have developed as a center of Shugendo, a Japanese mountain ascetic tradition, after the legendary ascetic En no Gyoja opened the mountain to religious practice.
Temples and lodging facilities for religious practitioners were established around the foot of the mountain, and many yamabushi, or mountain ascetics, entered the mountain to undergo spiritual training.
However, during the Tenbun era, the relationship between Jionji Temple and Mount Hayama was severed, and the mountain gradually declined as a major center of Shugendo practice.
Today, Mount Hayama retains traces of its religious past while being widely appreciated as a mountain where visitors can enjoy hiking and the beauty of nature.
Several hiking routes lead toward Mount Hayama’s summit, each offering different scenery and natural environments. Some are relatively accessible, while others require several hours of hiking and careful planning.
The Hijiori Route takes approximately 2 hours and 30 minutes from Sanbonbashi to the summit. It is one of the main routes approaching Mount Hayama from the Okura Village side.
The Tobeichi Pass Route leads from Tobeichi Pass via Mount Kuromori toward the summit. The section from Kuromori to the summit takes approximately 1 hour.
From Tombonuma Pond along the route, hikers can enjoy distant views of Mount Gassan. Some sections of the forest road leading to the trailhead are unpaved, so visitors should take care when accessing the trailhead.
The Hata Route begins at Hayama Shiminso, a former branch school of Shiraiwa Elementary and Junior High School, and continues via Hayama Campground and the Ohanabatake flower fields before reaching the summit. The route takes approximately 3 hours.
The trail passes through a beautiful primeval beech forest, and a viewpoint along the route offers panoramic views across the Murayama region. Near the trailhead, Hayama Shiminso provides a place to rest, and parking is available.
The Iwano Route takes approximately 3 hours and 30 minutes. Starting at Hayama Forest Campground, the trail passes the former site of Daienin Temple, Odanuma Pond, and Ohanabatake before continuing toward the summit.
In early June each year, the trail is surrounded by blooming dodan azaleas, known locally as the “Million-Dollar Dodan.” Remains of slopes once climbed by yamabushi for religious training can also be found along the route, allowing hikers to sense the mountain’s spiritual history.
The Shamu Route leads from Taruishi through Senaza Pasture toward the summit. The section from Senaza Pasture to the summit takes approximately 4 hours and 20 minutes.
Because this is a long hiking route, visitors should allow plenty of time and plan their hike carefully.
The Yamanouchi Route starts in Yamanouchi and passes through Shimizu, Eboshi Rock, and Furumuroyama before reaching the summit. The entire route takes approximately 5 hours and 30 minutes.
This long-distance trail crosses several mountains and rocky sections and is suited to hikers who want to spend more time exploring the deep mountain landscapes of Mount Hayama.
Mount Hayama offers a different experience with each season, from fresh green foliage in spring to alpine plants in summer and brilliant autumn colors in fall.
Walking beneath the beech trees and observing plants growing around the wetlands provides an opportunity to experience Yamagata’s rich natural environment at close range. On clear days, the summit offers magnificent views of the surrounding peaks, including Mount Gassan.
Mount Hayama combines a long history of mountain worship with the appeal of hiking and nature observation. It was once regarded as one of the Three Mountains of Dewa, and its religious traditions have continued to influence the cultural history of the surrounding region.
A visit to the Okunoin Inner Shrine, or Hayama Shrine, provides a glimpse into the mountain’s ancient spiritual traditions, while the hiking trails offer opportunities to experience beech forests, alpine plants, wetlands, and seasonal scenery.
With both the character of an ancient sacred mountain and the welcoming atmosphere of a mountain loved by local residents, Mount Hayama is a distinctive destination where visitors can experience the natural beauty and cultural heritage of Yamagata as one of the “100 Famous Mountains of Yamagata.”