Riding the Japan's Underwater Bullet Train from Hokkaido to Morioka

◆Seikan Tunnel connects Hokkaido and Aomori. It's the longest railroad tunnel in Japan,
Even Shinkansen takes over 20 mins to pass through the tunnel.

Europe in 2022
https://www.youtube.com/watch?v=ATzcI7zTeVQ&list=PLHn2qT4xUcrwcQF7PFjc35McMkOHnow4u

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