Seikan Tunnel was created in 1988.
the answer is 14.5 miles
The Earth's largest railroad tunnel is the Seikan Tunnel in Japan, which is over 33 miles long. When the Gotthard base tunnel in Switzerland is opened in 2016, Seikan Tunnel will be the second longest.
The world's longest railroad tunnel is the Seikan Tunnel, it is 33.49 miles long.
The Seikan Tunnel connects the Japanese islands of Honshu and Hokkaido and is 33 miles long.
The Seikan Tunnel is in japan. it is one of the longest in the world.
Tsugaru Strait, Japan: 53,850 metres (33.5 miles)
The Seikan Tunnel is located beneath the Tsugaru Strait, a channel, in Japan. The precise coordinates are 41.3157 degrees N, 140.3351 degrees E.
It will be the 34 mile long St Gotthard beneath the Alps, Switzerland, when the tunnel opens in 2017. Until then, the Seikan Tunnel in Japan at 33 miles long
January 1983 to March 1988.
¥538 billion
They used steel and concrete!