Mt. Iide (飯豊山)

Mt. Iide is without a doubt the best multi-day hike in the Tohoku region. The stunning scenery and abundance of mountain huts attract a large number of hikers in the summer months.

The hike: From the bus stop, hike through the small town and onto a gravel forest road. If you’ve hired a taxi then it’ll take you directly to the trailhead, saving this 30-minute walk. At the end of the road there’s a campground and small hut with hiking information. The trail is clearly marked and starts off as an extension of the road you’ve been hiking on. Soon enough it’ll branch off to the right, and this is where the real hike starts. It’s one heck of a climb, with a 1200 vertical meter elevation gain before reaching the ridge line! The maps say it’ll take 5 hours to reach the first hut of the day (at Mikuni-dake), but if you’re in shape you can do it in about 2 hours or so. The trail is very well-trodden, with lots of tree roots to climb up and over. The forest is all virgin beech, and the greenery is stunning. You’ll reach a water source at a place called Nakajugori (中十五里), but it’s not a reliable source of water (it’s a 5 minute hike down a spur trail to the right, and the water was just barely trickling out in mid-July). It’s better to fill up your bottles at the trailhead. A bit further on, after passing Sasa-daira (笹平), you’ll see an unmarked trail branching off to the right. Ignore this trail, as it’s an alternative way up the mountain and continue climbing toward the left. In another 10 minutes or so, you’ll reach another trail junction. You can either head right to climb to the summit of Mt. Jizo (地蔵山), or take the easier spur trail to the left. I’d recommend taking the left trail, because it passes right by a nice water source gushing with refreshing water. You can also see the ridge line of Mt. Iide rising up on your left. Soon after passing by the spring, you’ll meet up with the trail coming from Mt. Jizo. Turn left and follow the rocky ridge line towards Mt. Mikuni (三国岳). This trail is easy to find in clear weather, but could be a bit tricky if the fog is in, as there are no paint marks on the rocks. My advice is to follow the rocks that have scuff marks on them. This is not a place that you want to fall, but if you keep climbing then you’ll eventually pop out on the summit ridge, and they’ll be a hut awaiting you! If you’re set on a 3-night, 4-day hike, then check into the hut and enjoy the scenery. None of the huts on Mt. Iide have food or blankets, so you’ve got to bring a sleeping bag, stove, and food. The only downside with staying at Mikuni is that there’s no reliable water source, so if you’ve got extra time or energy, it’s better to push on for another 90 minutes to Kiriai hut (切合小屋), which has plenty of water. The ridge line between Mikuni and Kiriai is tricky, with a few chains in places, but the closer you get to Kiriai the easier it gets. You should also see your first set of snow fields. Just before the hut you’ll see a trail coming in on the right. This is another alternative way up the mountain, and very popular with people because it’s the shortest route up. If you’re a sucker for punishment, then you can continue another 90 minutes or so to Honzan hut (本山小屋). The trail will climb through a long snow field, and then drop steeply on the other side to a saddle, where you’ll find a Jizo statue. Then it’s a long, endless slog up to the hut. Most people take 2 days to reach this hut, but I made it in only 5-1/2 hours from Kiriai to this point. The hut manager is very friendly, and a place on the floor costs 2000 yen. All of the huts on Mt. Iide charge similar prices, but all have places to pitch your tent as well. From Honzan hut, it’s a 20-minute hike to the top of Mt. Iide, which is far as most hikers go. However, part of the beauty of this mountain is to traverse the entire length. It’s only 34.5km from end to end, and can be done in 3 days without a problem. Anyway, continue past the top of Mt. Iide, towards Mt. Dainichi (大日岳), the highest peak in the entire range. If the weather has been good then you’ve probably been staring at it ever since arriving at Mikuni! It should take about an hour or so to reach the trail junction at Onishi hut (御西小屋). You can leave your pack outside of the hut for the up-and-back assault of Mt. Dainichi. The maps say to allow 2 hours to reach the summit, but you can easily make it up and back in that time if you’re fit. You’ll have to cross a small snow field along the way, so take extra care if the snow is icy. The scenery is outstanding, as the Fuji-esque silhouette of Mt. Bandai stretches out in front of you. You can also see the peaks of Nikko National Park on a clear day, as well as Mt. Asahi, Gassan, and Mt. Chokai. Mt. Sado and the Sea of Japan will also greet you to the west. Head back down to the hut, where it’s time to make a decision. The next hut is 3 hours away, on a relatively flat ridge line. Keep pushing on if it’s early or you aren’t too worn out. There are a lot of snow fields to cross in this next section, so if you’re not confident then consider bringing a pair of light crampons to help boost your confidence. Climbing is no problem. but descending can be a bit slippery depending on snow conditions. Also, the track is a little difficult to follow in foggy weather, but luckily it’s well worn, so when in doubt always look for the footprints in the snow. You’ll pass by a few magnificent alpine lakes before reaching the summit of Mt. Eboshi (烏帽子岳). From here it’s a big descent to Kairagi hut (海花皮小屋). There’s plenty of delicious fresh water here, so take a break and check into the clean, beautiful hut if you’ve chosen this as your place to spend the second (or third) night. There’s a trail leading straight down the valley directly in front of the hut, but this is for climbing only (it’s one of the famous cirque climbs in Japan, up a very long and steep snow field). The next big climb is to the summit of Mt. Kitamata (北股岳), where you’ll find a small shrine. This is the highest peak in the northern section of the Mt. Iide mountain range. From here, it’s a relatively easy traverse over to Mt. Monnai (門内岳). Here you’ll find the final hut on the traverse. Check-in here, or push along for the 4-hour knee knocking descent down to Iide hut (飯豊山荘), with it’s lovely hot spring bath! To get there, continue on the ridge for about 20 minutes and you’ll find a trail junction. Turn right and follow the trail, down 1400 vertical meters. It’s quite steep, but there are plenty of tree roots to grab onto. There’s a water source about halfway down the descent. Take the short spur trail on the left in order to reach it. Remember the bus schedule before you set off for Iide hut. If catching the afternoon bus, then head down early enough too enjoy a 500 yen bath. It’s also possible to stay at the hut for 1700 yen (including use of the hot spring) if you tell them you’ve got your own sleeping bag and food. It’s also possible to continue along the ridge line all the way to Mt. Eburisashi (朳差岳) one of the 200 famous mountains of Japan. As it’s a 10km traverse from Monnai, you’ll need an extra day to reach it. Also, there’s no bus service from Oku-tainai (奥胎内) at the end of the hike, so you’ll have to fork over 9000 yen for a taxi.

When to go: This hike can be done during July and August only, when the buses are running. If you’ve got your own transport then you can do it in June or September. This mountain gets a ton of snow in the winter, so it’s better to avoid unless you’re training for Mt. Everest or something.

Access: From Niitsu (新津) station, take a train on the Banetsu-sai (磐越西) line bound for Aizu-wakamatsu (会津若松) and get off at Yamato (山都) station. From there, take a bus bound for Kawairi (川入) and get off at the last stop. There are only 2 buses a day, so it might be better to shell out 6000 yen for a taxi if you miss the 8:40am bus. Click here for the schedule. At the end of the hike, take a bus from outside of Iide-sanso (飯豊山荘) bound for the hospital (病院前) and get off at Oguni (小国) station. Again, there are only 2 buses a day, so make sure you’re off the mountain by 9am to catch the morning bus, or you’ve got to wait around (at the hot spring) all day. Click here for the schedule. The morning bus is timed perfectly for you to catch the 10:14am train to Yonezawa, which is again perfectly timed to transfer to the 11:40am Shinkansen to Tokyo.

Level of difficulty: 4 out of 5 (elevation change ~1722m).

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15 Comments on “Mt. Iide (飯豊山)”

  1. Julian Says:

    It’s good to see you did the whole traverse, especially having made the effort to get all the way there on public transport. And still many snowfields in late July!

  2. Nick Says:

    Hey. I was in your Methods II class in Osaka. I found your blog! :)

  3. John Kennett Says:

    Spent five days on Iide Renpo last week. Excellent. Japanese friend drove us from Tokyo to overnight in Dai Nichi Sugi Goya. 3 hour steep climb to Jizou and on to Kireawse hut across some tricky snow patches. Next day to Onishi Goya with side trip to Dai Nichi. Then out to Eburisashi and back to the start over three days. Great scenery, saw monkeys, snakes and a tanuki on the first day, many beautiful flowers. Fellow Japanese hikers were great. SUGOI !

  4. simpson Says:

    How about a link to a map?

    • wes Says:


      I haven’t been able to find a good on-line map. Shobunsha took down all of their on-line maps, so now all that’s available are the Yahoo and Google ones.

      You can buy a good map at any Japanese bookstore though


  5. Darrell Says:

    Hello Wes,

    Sorry to bite into your time, but wondering if you could shed some light on the Iide-san situation. If you’re not aware, the road and climbing entrance from Kawairi (川入) has been closed for sometime since last year due to heavy flooding:

    I’ve been searching for days trying to find any updated information if the road to Kawairi has been reopened. However, there doesn’t even seem to be any bus schedules available online, which leads me to believe that the road is still closed:

    Is it still possible to do the traverse? Or is the only option to start from Iide-sanso, climb up to Dainichi and go back the same way?
    Any help would be much appreciated!


  6. Darrell Says:


    Thanks for taking the time to look up this information. Again, I would never have found that info if not for your help! Spent the last 3-day weekend on the Mount Iide range. Unfortunately it was pouring rain everyday and barely got a glimpse of the ridgeline and surrounding views. But for a few instances the clouds cleared up and revealed majestic landscape …. different from the Alps but unique it’s own way. Can’t quite put my finger on it, but I almost prefer it than the Alps for its remoteness and different vibe. This is definitely a special mountain range and I would do this traverse again for a revenge trip given good weather conditions.

    The bus from Nozawa station to the new trailhead at Wataru Heishiro needs to be reserved at least 1 day in advance by phone. It takes 50 mins and costs only 300 YEN. It took me 5 hours to reach the second hut (Kiriai Hut). The bus schedule can be found here:

    Another update is that there are now 3 buses departing from Iide-sanso; 9:04; 11:35; 15:35.

    For Kanto based hikers, I took a nightbus from Tokyo to Koriyama station, then took local trains to Nozawa station. I ended the hike at Oguni station, took local trains to Niigata station and took a nightbus back home.

    • wes Says:


      Glad you made it up and back Iide safely. Yes, it’s one of my favorite areas. Alpine qualities without the crowds or the altitude sickness!

  7. Doug Says:

    Hi Wes,
    I don’t suppose you’ve been up this way in Early Nov before have you? I’ve encountered a lot of snow on nearby Asahidake in late Nov, but a snow-free Shirakamidake in early Nov…
    Thank you for all the effort you go through to maintain this amazing site.

    • wes Says:


      Unfortunately I haven’t done Iide in the fall. Early November is always a gamble – some years the mountains are already covered in snow, while other years it comes a bit later. Here’s a blog post from 2006 that shows a snow-free Iide in early November!

      • Doug Says:

        Thank Wes! We did a two-day loop (1-2nd Nov) from Iidesansou minshuku, staying the night at 梅花皮小屋. There had been some snowfall a couple of days earlier so there was snow on the top 400m of the mountains – the snow shoes were a lifesaver! The valley descent from the mountain hut was quite challenging; permanent snow/ ice fills the valley floor for 1km or so. Once the fresh snow ran out we could have really used crampons for the remainder of the snow/icefield. Thinking about trying to tackle the mountain again in spring..

      • wes Says:

        Thanks for checking in and glad to hear about your trip. Good luck in the spring – you’ll need those snowshoes for sure

  8. Thokari Says:

    Nice to meet you.
    I’m glad to know you love mountains of Iide.
    I love them very much.

    Those mountain ranges look very elegant.

    There are many shrines in the national nature parks of Tohoku area in Japan.

    People begins to agriculture every year seeing snow shapes of mountains, and thanks their harvest for nature.

    The name Mt.Eburisashi comes from the agricultural tool “Eburi “or “iburi” 朳 .

    In Japan especially in Tohoku , mountains have something to do with lives of people.

  9. dcabrahamson16 Says:

    As always, thanks for the great introduction to a mountain: this write-up in particular was super-helpful in getting orientated and Iidesan itself was absolutely terrific: incredible forests on the slopes, views along the ridge were spectacular and very few people along the way. I did the hike, pretty much as you laid out here in mid-July 2021. Below I’ll post a few updates people might find useful:

    1. I started the climb from Yaheishiro (弥平四郎). To do that with public transportation, (and coming from Niigata) I got off at the Nosawa station (野沢駅) and took the ‘Demand bus’. Basically how this works is you phone at least a day in advance, reserve a seat on the bus, and for the ridiculously cheap price of 300 yen (plus 150 for you backpack) the Demand bus will take you to Yaheishiro. The train from Niigata arrived at 10, so that means I didn’t get to Yaheishiro until 11:00, and given the July heat, hiking up to Mikunidake (三国岳) rather than Kiriawase (切合) made sense. The phone number for the Demand bus is: 0241.48.1300.

    2. I came down the mountain to Tengudaira (天狗平) (aka Iidesanso) (飯豊山荘) Right now, Oguni-machi is running three buses a day and these cost only five hundred yen to get to Oguni train station. The real lucky thing for me is that I took the 9:15 bus, got to Oguni at 10:00, and was able to catch the next bus to the Asahi range at 12:15! Here is the 2021 version of the timetable:

    3. Finally, a small point: in mid-July there were quite a few areas where the trail on Iidesan was still covered with heavy (and very slippery) snow and occasionally formed a slope that, if you slipped, would facilitate a very quick and unwanted decent down the mountain. All to say, I wish I had brought my cramp-ons…It would have been safer…

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