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Seikan Tunnel

The Seikan Tunnel (53.85 km long, 240 m below sea level) began operations on March 13, 1988, and serves as a major artery connecting Hokkaido and Honshu.
Chonai-cho is the entrance to the Hokkaido side of the Seikan Tunnel.

知内町

Location

48-27 Yunosato, Chonai-cho, Kamiiso District, Hokkaido

The information is current as of March 2021.
Please check the official website for details.

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