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Hachimantai Aspite Line

Little knownBarely documented in English. This is the kind of place the site exists for.

Researched and written by Hinato

Aspite Linesnow corridorHachimantaispring drivemountain road

Photo: Douglas Paul Perkins / Wikimedia Commons (CC BY 4.0) · original

Iwate has plenty of scenery; Hachimantai Aspite Line is the kind that's worth planning a whole day around.

The Aspite Line runs twenty-seven kilometres across the Hachimantai massif from Gozaisho in Iwate to Toroko Onsen in Akita, and it is shut by snow from around early November to mid-April. When the ploughs cut it open again the road runs between vertical walls of packed snow up to eight metres high, and it stays that way for weeks.

The snow corridor is the reason people drive it in spring, but it is not a single event — the walls survive in some form into Golden Week, longer than most such roads in Japan. Full opening in 2026 was on 15 April at ten in the morning. Until around late May the road closes overnight, running 8:30 to 5:00, and the pass at Mikaeshi is the high point.

Visiting essentials

Best season

Mid-April–early May for the snow corridor | Late September–October for autumn colour

How long to allow

2–3 hours to drive with stops

Hours

Normally open 24 hours | Overnight closure with access 8:30 AM – 5:00 PM until around late May

Closed: Fully closed from around early November to mid-April

Entry fee

Free

Getting there

Directions

Crossing the Hachimantai massif from Gozaisho in Hachimantai, Iwate, to Toroko Onsen in Akita, about 27 km. Fully closed from around early November to mid-April; full opening in 2026 was on 15 April at 10:00 AM. Normally open 24 hours, but with an overnight closure of 8:30 AM – 5:00 PM in force until around late May. The snow corridor, with walls up to 8 m, lasts into Golden Week. Free to drive. Confirm the current year's opening date and any overnight restriction before travelling.

Local knowledge

**Check the overnight closure.** Arriving in the evening in early May means finding a gate. **The corridor lasts into Golden Week.** Unlike shorter snow roads elsewhere, the walls here survive for weeks. Late April is the peak and early May still works. **Eight metres at the highest.** Which means driving through a slot with no view out. Stopping is only safe at the marked pull-ins. **Mikaeshi pass is the high point.** The car park there is the base for the summit walks once the snow has gone. **Combine with Toshichi.** The highest hot spring in Tohoku is on the connecting Jukai Line and opens at roughly the same time of year.

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