The Daishimizu Tunnel (approx. 22.2 km / 22,228 m) is one of the Joetsu Shinkansen’s defining features. Passing through it offers a modern-day realization of the famous line from Kawabata Yasunari’s “Snow Country” — a short ride through darkness followed by the sudden emergence into a snowy landscape.
1. The main highlight — a modern “Snow Country” experience
- On winter days, the weather contrast across the ridge is striking: the Gunma (Jomo-Kogen) side often has clear skies due to dry winds, while the Echigo-Yuzawa side can be buried in snow. The tunnel takes roughly 7–8 minutes to traverse.
2. Scenic points before and after the tunnel
Before entering (Jomo-Kogen side)
- The ridgelines of the Tanigawa Mountains (Tanigawa Range) rise dramatically; you can enjoy close-up views of rugged peaks and cliffs, often alongside the Kan-Etsu Expressway.
The moment you emerge (Echigo-Yuzawa side)
- Suddenly the view opens to the Uono River valley, resort towns, and ski areas. The elevated track gives a thrilling ‘descending into a winter resort’ feel.
3. History & infrastructure notes
- At opening in 1982, Daishimizu Tunnel was the longest land railway tunnel in the world (22,228 m).
- Groundwater discovered during construction became a recognized source for mineral water brands such as “From AQUA.”
4. Practical tips (timing & seats)
- Timing: Rough guideline — enter tunnel ~3 minutes after Jomo-Kogen station passage; tunnel transit ~7–8 minutes (varies by service).
- Best seat: For downbound trains (toward Niigata), Seat E (right-side window) is recommended to view the Uono River valley and resort towns after exiting the tunnel.
5. Search keywords & related topics
- Joetsu Shinkansen Daishimizu Tunnel snow country
- Shinkansen tunnel exit scenic view
- Tanigawa Mountains shinkansen which side to sit
Related: Joetsu Shinkansen scenic highlights