IIDE-SAN (Mt. Iide)


Hiking Guide to the mountains of Yamagata Prefecture



Iide-san is the namesake of the Iide Renpo and one of the 100 Famous Mountains of Japan known for the depth to which you can get into nature.

Lying along the borders of Yamagata, Niigata, and Fukushima Prefectures, Iide-san is a mountain famous for mountain worship since ancient times. Although lower than Oasahi-dake, the other 100 Famous Mountain of Japan along the Iide Renpo, Iide-san is a very popular destination for its alpine vegetation including flower fields, and the sheer depth into nature at which one can go on the mountain. These are major pulling factors for those aiming to hike the 100 Famous Mountains of Japan.

Iide-san is a particularly difficult mountain to reach requiring technical skill and endurance. No matter which trail you take, a day hike on Iide-san is all but impossible. You will need to stay somewhere on the mountain. The top of the ridge along Mikuni-dake, Iide-san, and Onishi-dake, and the summit of Iide-san, are in Fukushima prefecture.

Tengudaira Trail (10 to 16 hours one-way)

The Tengudaira Trailhead in Oguni Town has two main trails starting from Iide Sanso mountain lodge. First is the trail that goes via Kitamata-dake on either the Marumori or the Kashigawa ridges. Second is the direct route along the Daigura ridge. For those going via Kitamata-dake, there are emergency huts on each of the Mon’nai-dake, Kitamata-dake, and Onishi-dake summits. However, there are no huts along the Daigura ridge. This means this trail is only suitable for advanced hikers.

There is a primeval beech forest surrounding Iide Sanso, which was also Japan’s first ‘forest therapy’ base.

Access to the trailhead is on a paved road. There is enough space for about 11 cars at the trailhead. 370m from the trailhead on an unpaved road there is space for about 30 cars. There is a public toilet open 24 hours about 400m in front of Iide Sanso.

Dainichisugi Trail (10 hours one way)

The Dainichisugi Trailhead lies in Iide Town and starts at the Dainichisugi Hut at the end of a paved road. The Dainichisugi Trail takes you via Jizo-take and Tanemaki-yama to the summit of Iide-san. The Kiriawase Mountain Hut lies along the trail near the junction for Tanemaki-yama. Besides the Zange slope right near the trailhead there aren’t many steep parts. However, there are snowpacks along the way so an ice axe and crampons are necessary. Be sure to check the condition of the snow before climbing up.

Access to the Dainichisugi Trailhead is possible via a paved road. There is a space for parking on gravel about 120m in front of the trailhead for about 30 cars. About 6 cars can fit in front of the bridge at the end of the forest road. There is also a toilet on the ground floor of the Dainichisugi Hut.



Mt. Iide, Mt. Iide-san, Mt. Ide, Ide-san

Iide-san (飯豊山いいでさん) is a 2105m (6906 ft.) peak in the Okitama Region of Yamagata prefecture best climbed from July to October. Iide-san is a level 7 in terms of physical demand, which means it is extremely demanding. The mountain has a C technical grade, which means it requires a moderate level of expertise. Allow at least 12 hours one-way for a climb.

Mountain Range

Iide Renpo


Okitama Region


2105m (6906 ft.)

Technical Demand

C (requires expertise)

Physical Demand

7 (extremely demanding)


Tengudaira Trail (10 to 16 hours one-way), Dainichisugi Trail (10 hours one way)

Best time to climb

July to October

Day trip possible?

No. You must stay on the mountain.

Minimum Time Required

20 hours of hiking, so you must stay on the mountain

Google Map with trailheads and summit.

PDF Maps by TheHokkaidoCartographer and JapanWilds.org. See all here.


Mt. Maya seen from the distance
Mythical Beasts, Buddha’s Mother, and buried Yamabushi treasure? Welcome to Maya-san (Mt. Maya).
Panoramas and picnics under the Sakura: Kita-yama (Mt. Kitayama)
Exploring The Yamabushi Trails of Kinbo-zan (Mt. Kinbo)


A Jizo statue at the top of Mt. Kyogakura in Sakata
Womb Passes and Monkey Crossings: Kyogakura-san “The Shugendo Peak of Sutras” (Mt. Kyogakura)
Hiking Japan’s Forgotten Highway: Sabane-yama and Ushu-Kaido (Mt. Sabane)
Mt. Haguro's Five Story Pagoda
Why This Tiny Mountain MUST be on Your Japan Itinerary: Haguro-san



Tim Bunting Kiwi Yamabushi




Get In Touch

Share this:

Like this:

Like Loading...
Scroll to Top