What Is the Yamagata Shinkansen? The Mini-Shinkansen Explained

At Fukushima Station, one bullet train uncouples from another, leaves the high-speed main line, and slips onto what looks like an ordinary local railway heading into the mountains. That train is the Tsubasa, and it runs from Tokyo into Yamagata Prefecture as the Yamagata Shinkansen, Japan's original mini-Shinkansen. Past Fukushima, it swaps speed for orchards, level crossings and mountain views, and your Japan Rail Pass covers every kilometre. This guide explains how the mini-Shinkansen works and why it is worth riding into Yamagata's onsen and temple country.

Quick Answer — What Is the Yamagata Shinkansen?

The Yamagata Shinkansen is the Tsubasa service from Tokyo into Yamagata Prefecture, a 'mini-Shinkansen' that leaves the main line at Fukushima and runs on converted conventional track. From Tokyo to Fukushima, it uses the Tohoku Shinkansen, usually coupled to a Yamabiko train, then continues alone for about 149 km through Yamagata city to Shinjo. On that converted section, trains run at up to 130 km/h and pass level crossings. The whole route is covered by the JR Pass, and every Tsubasa seat is reserved.

The Mini-Shinkansen Idea

The Yamagata Shinkansen is called a mini-Shinkansen because it reached Yamagata by widening an existing local railway instead of building a new high-speed line. The Ou Main Line between Fukushima and Yamagata was converted so Shinkansen trains could run straight through, opening in 1992 and extending to Shinjo in 1999.

Japan's conventional railways use 1,067 mm narrow gauge, while the Shinkansen runs on 1,435 mm standard gauge. It's a split with roots in the Meiji era that still shapes how the network fits together. Tunnels and platforms kept their original clearances, so the Yamagata mini-Shinkansen trains are built differently:

• Narrower cars: The cars are about 2.95 m wide against roughly 3.35 m on full-size Shinkansen, with 2+2 ordinary seating.
• Fold-out steps: These bridge the gap at the wider platforms between Tokyo and Fukushima.
• Shared rails: Local trains on the converted section were regauged too, so both use the same track.

It was a clever compromise:

• Gain: You get a direct train from Tokyo, with far less construction than a new high-speed line.
• Cost: The trade-off is slower running on the converted stretch.

The Route and Its Character

The Yamagata Shinkansen route runs north from Tokyo to Fukushima, climbs west into the mountains, drops into the Yamagata basin, and continues north to Shinjo. From Tokyo, the Tsubasa typically reaches Yamagata in around two and a half to three hours. Shinjo is usually 45 minutes to an hour further on.

Beyond Fukushima, it passes through three stretches:

• Itaya Pass: The line makes a steep, forested climb to Yonezawa, a castle town known for its beef.
• The basins: Akayu, Kaminoyama-Onsen, Yamagata city, and Tendo follow, with vineyards and hot springs near the line.
• The northern run: The train calls at Oishida, the stop for Ginzan Onsen (pictured below), before ending at Shinjo in deep snow country.

This is onsen and orchard country. Yamagata is dotted with hot spring towns, and cherries, grapes, and pears grow beside the tracks.

The Tsubasa Trains

The Tsubasa is the train that runs the Yamagata Shinkansen, and today it's operated by JR East's E8 series. The E8 entered service on 16 March 2024, and the older E3 left regular service in December 2025.

Its main features are:

• Design: Yamagata-born Ken Okuyama styled it in white and purple, with safflower-yellow accents and a 9 m nose.
• Speed: It reaches up to 300 km/h on the Tohoku Shinkansen, up from 275 km/h on the E3, and 130 km/h on the converted line.
• Seating: JR East's seven-car Tsubasa formation carries reserved seats only, with one Green Car at the Tokyo end.

The Tsubasa's party trick is how it shares the main line with another train:

• Tokyo to Fukushima: Most Tsubasa trains run coupled to an E5 series Yamabiko, travelling as one long train at up to 300 km/h.
• At Fukushima: The two split, with the Yamabiko heading for Sendai and the Tsubasa peeling off onto the converted track.

There is no walkway between them, and since full-size and mini trains share platforms across Japan's Shinkansen network, the car-position markings on the platform are worth checking.

What Mini Means for the Ride

The ride changes character at Fukushima: the Tsubasa slows to a maximum of 130 km/h, shares tracks with local trains and runs past ringing level crossings.

• Slower climbs: Gradients reach up to about 3.8% over the Itaya Pass.
• Closer scenery: Rice fields, orchards and village houses pass right beside the window.
• Occasional waits: Parts of the line are single track, so trains sometimes pause for oncoming services.
• Winter delays: Heavy snow can disrupt this section more often than a dedicated Shinkansen line.
• Patchy signal: Mobile coverage can drop briefly in the mountain tunnels, and a portable Wi-Fi router keeps maps and bus times loading for the rest of the journey.

JR Pass Coverage

The Yamagata Shinkansen is fully covered by the Japan Rail Pass, from Tokyo all the way to Shinjo, with no extra fee. That's a handy saving, as a regular-season reserved seat from Tokyo to Yamagata costs around ¥11,700 one way. The practical points are simple:

• Reservations: Every Tsubasa seat is reserved, and seat reservations are free for JR Pass holders at station ticket offices and reserved-seat machines.
• Busy periods: Book a few days ahead around Golden Week, Obon, New Year, and Ginzan's winter peak.
• Buses: Local buses, including the one to Ginzan Onsen, are not covered.

Choosing between the nationwide pass and a JR East regional pass comes down to geography, as the JR East Pass (Tohoku area) covers the Tsubasa too. If Yamagata is a side trip from a Tokyo, Kyoto, and Osaka itinerary, point-to-point train tickets for those Golden Route legs may work out cheaper than any pass.

Why Ride It

The strongest reasons to ride the Yamagata Shinkansen are near the end of the line. Ginzan Onsen is a hot spring village of old wooden inns, and Yamadera is a mountainside temple reached by around 1,000 stone steps. Just check out the photo above - it's stunning! 

Ginzan Onsen grew up around a former silver mine, and its Taisho-style inns line both banks of a narrow river lit by gas lamps after dark. Getting there works like this:

• Train: Take the Tsubasa to Oishida, around three hours and 20 minutes from Tokyo.
• Bus: The bus takes about 35 to 40 minutes and costs around ¥1,000, with only a handful of daily departures.
• Stay: Rooms book up early in winter, so reserve well ahead for the snowy gas-lamp season.

Yamadera, founded in 860 and officially named Risshakuji, sits high on a wooded mountainside above its own station. A visit usually looks like this:

• Train: Ride roughly 20 minutes on the JR Senzan Line from Yamagata, covered by the pass.
• Climb: Allow 30 to 40 minutes up to Godaido Hall, and bring ¥500 cash for entry.

FAQs

Find answers to common questions about the Tsubasa and its converted line.

Q: What is a mini-Shinkansen?
A: A mini-Shinkansen is a bullet train service that continues onto an existing local line widened to Shinkansen gauge, using slimmer trains.

Q: What is the Tsubasa?
A: The Tsubasa is the train that operates the Yamagata Shinkansen, currently run with E8 series sets.

Q: Does the JR Pass cover the Yamagata Shinkansen?
A: Yes, the Japan Rail Pass covers the Yamagata Shinkansen from Tokyo to Shinjo with no supplement.

Q: How much is the Tsubasa without a JR Pass?
A: A regular-season reserved seat from Tokyo to Yamagata costs around ¥11,700 one way, and JR East's discounted e-tickets can shave a little off that.

Q: Is the older E3 Tsubasa still running?
A: The E3 left regular Tsubasa service in December 2025, so the sleek E8 now handles the timetable.

Q: Do I need a seat reservation for the Tsubasa?
A: Yes, all Tsubasa seats are reserved, though JR Pass holders can book them free of charge.

Q: How long does the Tsubasa take from Tokyo to Yamagata?
A: The journey typically takes around two and a half to three hours.

Q: Can I walk between the coupled Tsubasa and Yamabiko?
A: No, there is no connecting walkway, so board the car on your Tsubasa reservation.

Q: Does the Yamagata Shinkansen stop at Yamadera?
A: No, you change at Yamagata to the JR Senzan Line, which reaches Yamadera in about 20 minutes.

Q: Which station is closest to Ginzan Onsen?
A: Oishida Station is the nearest, with a local bus ride of about 35 to 40 minutes to the village.