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Seikan Tunnel Museum – Aomori

🚄 Seikan Tunnel Museum (青函トンネル記念館) – Aomori

Explore One of the World's Longest Undersea Tunnels

The Seikan Tunnel Museum, located in Tappi Misaki (Cape Tappi) in Aomori Prefecture, offers a fascinating look into the history, construction, and technology behind the Seikan Tunnel (青函トンネル) — the world’s longest undersea railway tunnel until 2016, connecting Honshu (Aomori) and Hokkaido beneath the Tsugaru Strait.


🌊 About the Seikan Tunnel

  • Total length: 53.85 km (33.4 miles)

  • Undersea section: 23.3 km (14.5 miles)

  • Completed in 1988 after more than 17 years of construction

  • An engineering marvel built to withstand strong currents, earthquakes, and harsh weather


🏛️ What to See at the Museum

  • Detailed exhibits on tunnel construction, geology, and engineering challenges

  • Scale models, videos, and photos of the massive project

  • Historical machinery used in excavation

  • Displays that honor the workers and victims involved in the construction


🚇 Experience the Underground World

  • In summer (typically April to November), visitors can ride the Seikan Tunnel Experience Train down to the actual underground work station used during construction, known as the “Kaikyo Line Shiryōkan” (海峡線資料館)

  • Travel 140 meters below sea level, walk along a former work site, and feel the power of this feat of engineering


🌅 Scenic Location

  • The museum is located near Cape Tappi, known for its dramatic coastal cliffs and panoramic views of the Tsugaru Strait

  • You can also visit the Tappi Wind Park and nearby hiking trails for beautiful ocean scenery


🎯 Why Visit?

  • 🚄 Learn about one of the greatest infrastructure projects in Japan

  • 🌊 Stand above and go near the legendary tunnel beneath the sea

  • 👷 Appreciate the human effort and innovation behind connecting two islands

  • 📸 Enjoy a combination of technology and natural beauty at Cape Tappi


🧭 Access

  • From Aomori City, take a train to Minmaya Station, then a short taxi or bus to the museum

  • The tunnel access tour is seasonal and may require reservations


Whether you're interested in railways, engineering, or Japanese history, the Seikan Tunnel Museum offers a rare and unforgettable look into one of Japan’s boldest achievements beneath the sea.

Official Website
http://seikan-tunnel-museum.jp/en/

Accommodation sites
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