Japan’s Seikan Tunnel: The World’s Longest Undersea Tunnel Japan’s Seikan Tunnel is the longest undersea tunnel in the world, stretching over 53 kilometers, with 23 kilometers running beneath the ocean floor. Built to withstand earthquakes and harsh seabed conditions, it connects Honshu and Hokkaido. Completed in 1988, the tunnel stands as a triumph of civil engineering, safety planning, and geological mastery—especially in one of the world’s most seismically active regions. Important Details: •

Underwater Railway Tunnel sa JAPAN “THE SEIKAN TUNNEL” #fyp #japan #seikantunnel #fblifestyle | 𝐒𝐄𝐍𝐏𝐀𝐈 𝐕𝐎𝐍

Seikan Tunnel na 200 meters below the sea dito sa Japan 🇯🇵 | JP in Japan

Seikan Tunnel Bullet Train (1988) #reels #fbreels #india #japan #bullettrain #japantrain #newpost #TsugaruStraitTunnel #BulletTrain #SeikanTunnel #JapanTravel #RailwayHistory #TrainEnthusiast #RidingTheTunney #1988Japan #EngineeringMarvel #CrossingTheStrait #TsugaruStrait #JapanRailways #TrainSpotting #HistoricalTransportation #TransitAdventure #TravelJapan #RailwayInfrastructure #TunnelConstruction | The Informed Citizen

We talk about the Seikan Tunnel in Japan, which is the deepest and longest underwater train tunnel in the world. It connects the islands of Honshu and Hokkaido, and was built through solid rock and under high water pressure, taking 17 years to complete. The tunnel is designed to resist earthquakes, flooding, and even typhoons, and trains can travel through it at speeds of up to 320 kilometers per hour. | Auto Viral