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The 53.85 km (33.46 mi) Seikan Tunnel opened between the cities of Hakodate and Aomori, Japan.
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Seikan Tunnel
Undersea railway tunnel in Japan
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 Honshu, Japan's main island, from the northern island of…Source: Wikipedia (CC BY-SA)
Hakodate
Core city in Hokkaido, Japan
Hakodate is a city and port located in Oshima Subprefecture, Hokkaido, Japan. It is the capital city of Oshima Subprefecture. As of January 31, 2024, the city had an estimated population of 239,813 with 138,807 households, and a population density of 354 inhabitants per square…Source: Wikipedia (CC BY-SA)
Aomori
Prefecture capital and Core city in Tōhoku, Japan
Aomori , officially Aomori City, is the capital city of Aomori Prefecture, in the Tōhoku region of Japan. As of 1 August 2023, the city had an estimated population of 264,945 in 136,781 households, and a population density of 321 people per square kilometer spread over the…Source: Wikipedia (CC BY-SA)