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13/03/1988 The longest undersea tunnel opens in Japan

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The Seikan Tunnel —【Japanology Plus】

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Seikan Tunnel Tappi Cable Car

The Seikan Tunnel is a 53.85 km (33.46 mi) dual gauge railway tunnel, with a 23.3 km (14.5 mi) long portion under the seabed. It extends beneath the Tsugaru Strait as part of the standard gauge Hokkaido Shinkansen and the narrow gauge Kaikyo Line portion of the Hokkaido Railway Company Tsugaru-Kaikyō Line.
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