The Seikan Tunnel in Japan is the longest tunnel with an underwater section in the world, measuring a total of 53.85 kilometers (33.4 miles) in length, around 23.3 kilometers (14.5 miles) of which ...

The Seikan Tunnel in Japan is an extraordinary underwater tunnel. It cost approximately £5.6 billion to construct and links Japan to its northern islands, specifically connecting the islands of ...

Japan boasts the world's longest underwater tunnel, which stretches for more than miles under the seabed of the Tsugaru Strait, but it's now barely being used.. Work on the Seikan Tunnel was ...

The project—a Japan-South Korea undersea tunnel--has also been criticized as an elaborate tool of the group, the Unification Church, to bilk its followers of their money.

Although the project was approved in 2017, financial setbacks delayed construction. With an estimated investment of USD 1.87 billion, the tunnel is now set to open in 2033.

A plan to build a new undersea tunnel running parallel to the Seikan Tunnel linking Hokkaido and Japan’s main island of Honshu has been met with mixed views.

Narendra Modi (left) and Shinzo Abe at a bullet train manufacturing plant in Kobe, Japan, on November 12, 2016. Construction for an underground system, which features an underwater tunnel, for ...

It will travel through an undersea tunnel about 1 kilometer (0.62 miles) ... TEPCO, Japan’s government, and the IAEA argue that tritium occurs naturally in the environment, ...

Narendra Modi (left) and Shinzo Abe at a bullet train manufacturing plant in Kobe, Japan, on November 12, 2016. Construction is getting underway near Mumbai, India, on an undersea tunnel that's ...