The Tadami Line: A Slow Train Through the Mountains of Aizu
Four and a half hours on a one- or two-car local train, along a green river and over iron bridges, from the castle town of Aizu-Wakamatsu across the mountains to Niigata
The Tadami Line takes its time. From Aizu-Wakamatsu the train climbs out of the Aizu basin and finds the Tadami River, then follows it for most of the day. It crosses iron bridges, runs past dam lakes that hold the mountains upside down, and passes villages where people still wave at the train. Near the end it leaves the river and crosses the mountains into Niigata, some of the snowiest country in Japan, before running down to Koide.
People come for two seasons above all. Autumn colour fills the valley from late October into early November, and in winter the bridges and the trains run through deep snow. In between, it is a quiet line that the people of Aizu fought to keep. Floods cut it in 2011, and the middle section was rebuilt and reopened in October 2022.
How this page was madeWe have not ridden the Tadami Line, and what we know of Japan is researched, not first-hand. This page is built from JR East’s timetables and notices, the line’s official site, run by Fukushima Prefecture, local tourism sources, and dated accounts by passengers who rode it between 2023 and 2025. When we ride it, we will say so here.
Last updated 6 November 2026
The route
The line was built from both ends. The Aizu end opened in 1926 and the Koide end in 1942. The mountain section between them follows the route of a railway built in the late 1950s to carry materials to the Tagokura Dam, one of the large hydroelectric dams on the Tadami River. The line was completed in 1971, at 135.2 km.
In July 2011 heavy rain swept away three of its river bridges between Aizu-Kawaguchi and Tadami. For eleven years buses ran in place of trains on that stretch. Fukushima Prefecture and the towns of Aizu agreed to take on the rebuilt track, with JR East running the trains, and the whole line reopened on 1 October 2022. It is single track all the way, so trains wait at stations for each other to pass.
What the rail journey is like
Passengers who write about the scenery dwell on the river. Between Aizu-Kawaguchi and Aizu-Sakamoto it runs close beside the track, and one writer, riding in August 2023, said it was there on both sides and felt like Europe. Another, in summer 2025, found the dam at Honna closer and more impressive than he expected. A third, in August 2023, thought the water less clear than the photographs suggest, though the mountains reflected in it photograph beautifully.
The trains are short, and the through trains are busy. On a winter morning at the end of 2023 the first train from Aizu-Wakamatsu was a single car, full twenty minutes before it left, with more than twenty people standing. A walker on YAMAP in November 2025 found the morning train close to full, with frost on the ground and snow on the far peaks. Several passengers had windows fog up in the tunnels and in the warm, crowded cars.
The waits are part of it. Trains often stand for half an hour at Aizu-Kawaguchi for a train coming the other way, and passengers use the time to stretch their legs. One found genmai dango, brown-rice dumplings, at the station shop there. Sarah Carter, of A Social Nomad, rode the 13:05 the whole way one April, wrapped up against the cold, with blossom in places and snow in others.
Look out for the people in the villages. Passengers on this line keep mentioning them: people in the settlements along the way who stop what they are doing to wave at the train.
The line has its own photographer. Hoshi Kenkō, born in Okuaizu, has photographed it and its valley for more than thirty years, some 300 days a year. After the floods, his pictures of trains crossing the bridges in mist and snow were used to make the case for the line, and he gave them away freely. A 2022 documentary by Abiko Wataru, Mugen Tetsudō (霧幻鉄道), follows him and the people of the valley as they worked to bring the line back.
The stages
The whole run takes 4 hours 15 minutes to 5 hours, depending on the train and the waits at passing places, so times for each stage vary. The stages follow the line westbound; the views are the same in reverse.
| Stage | From → to | Time | What you see, and which side | Stops and changes | Main constraint |
|---|---|---|---|---|---|
| 1 · Out of the Aizu basin | Aizu-Wakamatsu → Aizu-Yanaizu | Varies by train | Out across the basin and into the hills, where the line picks up the Tadami River on the way to Aizu-Yanaizu and Enzō-ji on its crag | Aizu-Bange, Aizu-Yanaizu | Through trains are often full from the start; queue early |
| 2 · The bridges | Aizu-Yanaizu → Aizu-Kawaguchi | Varies; includes the wait at Aizu-Kawaguchi | The river and its iron bridges, among them the First Tadami River Bridge near Aizu-Hinohara | Aizu-Miyashita, for the bridge viewpoint; Aizu-Kawaguchi | A wait of about 30 minutes at Aizu-Kawaguchi is common |
| 3 · The rebuilt line | Aizu-Kawaguchi → Tadami | Varies by train | The stretch closed from 2011 to 2022, past the dam at Honna and over the three rebuilt river bridges | Tadami | Only three trains a day each way on this section |
| 4 · Over into Niigata | Tadami → Koide | About 30 minutes to Oshirakawa, then on to Koide | About half an hour without a stop from Tadami to Oshirakawa, through the mountains on the prefecture border, then down to Koide | Oshirakawa, Koide | The snowiest section; winter snow can stop the trains here |
Stops worth breaking the journey for
With three through trains a day, a stop in the middle of the line means a wait of several hours for the next one. The Aizu end has more trains, and Tadami makes a good place to spend the night and split the journey.
Aizu-Yanaizu
About ten minutes’ walk from the station, Enzō-ji stands on a crag above the Tadami River. It is free, and it is linked with the legend of the akabeko, the red cow of Aizu, whose statue you can stroke for luck.
Aizu-Miyashita
The walk to the viewpoint above the First Tadami River Bridge, the line’s best-known view, starts here. Sources give between 35 minutes and an hour, uphill, by way of the roadside station at Mishima-juku. Check when the next train crosses before you climb.
Aizu-Kawaguchi
Where most trains stop for a while, and where more of them turn back towards Aizu. There is a lookout over the river about ten minutes’ walk away, and the station shop sells local snacks when it is open.
Tadami
A mountain town at the top of the valley, with a viewpoint, painted murals at the station, and a small museum to the samurai Kawai Tsuginosuke, open late April to mid-November. Most things close in winter.
At Hayato, between Aizu-Miyashita and Aizu-Kawaguchi, a small ferry runs through the misty gorge of Mugenkyō from spring to November. Hoshi Kenkō revived it after fifty years. It must be booked at least five days ahead, and the sources we read disagree on its prices and on the walk from the station, so check with the operator.
Planning the journey
Where to sit
There is no agreed side. One passenger, in 2025, advised the left side leaving Aizu-Wakamatsu and the right leaving Koide. Another found the river on both sides on the best stretch, and a third moved seats to change the view. On a full train you may have no choice. Get a window if you can, and move when seats free up.
Which train to take
Westbound, Aizu-Wakamatsu to Koide: 06:08 → 10:41 · 13:05 → 17:47 · 17:00 → 21:17
Eastbound, Koide to Aizu-Wakamatsu: 05:36 → 10:32 · 13:12 → 17:24 · 16:12 → 20:55
We read the weekday timetable only; check JR East for weekends and holidays. On some weekends and holidays the Kazekko sightseeing train runs from Aizu-Wakamatsu to Tadami and back, all seats reserved, for ¥840 on top of the fare. It does not go on to Koide.
The midday trains, 13:05 from Aizu-Wakamatsu and 13:12 from Koide, are the most popular and the most crowded. The evening trains, 17:00 westbound and 16:12 eastbound, end in the dark all year. In autumn and winter the light goes by about half past four, so the early trains show you most of the line and the midday trains finish in the dark. In summer the midday trains have light to the end.
Booking, passes and fares
There is nothing to book on ordinary trains: seats are first come, first served. You cannot use Suica, PASMO or other IC cards anywhere on the line. Buy a paper ticket at Aizu-Wakamatsu (machines from 05:00, ticket office from 07:00), or pay on board if you join at an unstaffed station. The fare end to end is about ¥2,500, but we found no current official figure, so check it at the station. The Japan Rail Pass covers the line; our page on the Japan Rail Pass sets out when the pass pays. We could not confirm which JR East regional passes include it, so check before you buy one.
One way or there and back?
One way, and leave the return to faster lines. From Tokyo, the Tohoku Shinkansen to Kōriyama and the Ban’etsu West Line bring you to Aizu-Wakamatsu. From Koide, a short ride on the Jōetsu Line reaches Urasa, on the Jōetsu Shinkansen back to Tokyo. To make the trip less of a dash, stay a night in Aizu-Wakamatsu before the early train. Or break the journey with a night in Tadami: one passenger found the next morning’s train almost empty. Our guide to getting around Japan covers the Shinkansen.
Travelling with a mobility need, and luggage
Aizu-Wakamatsu has accessible toilets and a step-free route to the platforms, with help from the staff. Most stations along the line are small and unstaffed, and we found no information on step-free access at them. One passenger reports a roomy accessible toilet on the newer KiHa E120 cars, but not every train uses them. On a crowded one- or two-car train there is little room for large cases, so travel light if you can.
If the journey breaks down
This is a mountain line with few trains:
- Snow stops trains in winter, mostly between Aizu-Kawaguchi and Koide. In 2025 the Aizu-Kawaguchi to Tadami section was closed on some days in April and May, and buses replaced the trains. Check the line’s official site and JR East’s notices before you set out.
- Trains can run late. On one cold November morning in 2025, wheel slip on a climb slowed a train to a crawl and it lost about twenty minutes. If you have a Shinkansen to catch at the far end, leave plenty of time.
- Miss a train in the middle section and the next may be hours away. Carry water and something to eat, as there is no trolley or shop on board.
A final word on the Tadami Line
A slow train along a mountain river, over iron bridges and through villages that wave it on its way, on a line its people would not let go. Catch an early train, take a window seat if you can, and give it the whole day.
Andrew + Margaret
- Rail journeys Journeys
- The Resort Shirakami Journeys
- The Kurobe Gorge Railway Journeys
- The Yodo Line Journeys
- Japan’s regions Overview
- Getting around Japan Practical
- Is the Japan Rail Pass worth it? Practical
- Tadami Line official site: news, stations and sights Official
- JR East: timetables and service notices Official
- Mugen Tetsudō (霧幻鉄道), dir. Abiko Wataru, 2022, a documentary about the photographer Hoshi Kenkō and the line Film
Can I do the whole line as a day trip from Tokyo?
Not comfortably. The line alone takes four to five hours, and the journeys to Aizu-Wakamatsu and back from Koide add several more; we have not checked the connecting times, so plan them with JR East. A night in Aizu-Wakamatsu before the early train, or a night in Tadami halfway, makes it a far easier day.
Does the train run in winter?
Yes, all year, and the snow is one of the reasons people go. But heavy snow can stop the trains, especially at the Niigata end, for days and in some winters reportedly for weeks; we could not confirm how long the 2026 closures lasted. Check the official site before you travel.