Japan1988Tech launches
Seikan Tunnel Opens Japan
The world's longest undersea tunnel connected Honshu and Hokkaido, transforming Japanese transportation and regional integration.
The Seikan Tunnel is a 53.85-kilometre (33.5-mile) dual-gauge railway tunnel in Japan, with a 23.3-kilometre (14.5-mile) segment running beneath the seabed of the Tsugaru Strait, which separates Aomori Prefecture on H… - summary

