The Seikan Tunnel (青函トンネル Seikan Tonneru or 青函隧道 Seikan Zuidō) is a 53.85 km (33.46 mi) dual gauge railwey tunnel in Japan, wi a 23.3 km (14.5 mi) lang portion unner the seabed.

Seikan Tunnel
Seikantunnel - Tsugaru street detail.PNG
Map o the Seikan Tunnel
Overview
LocationAneath the Tsugaru Strait
Coordinates41°18′57″N 140°20′06″E / 41.3157°N 140.3351°E / 41.3157; 140.3351Coordinates: 41°18′57″N 140°20′06″E / 41.3157°N 140.3351°E / 41.3157; 140.3351
StatusActive
StairtHonshu
EndHokkaido
Operation
AinerJapan Railwey Construction, Transport an Technology Agency
OperatorJR Hokkaido
Technical
Track lenth53.85 kilometres (33.46 mi)
(23.3 kilometres (14.5 mi) unnersea)
No. o tracksdooble track rail tunnel
Track gaugeMixed
Electrified25 kV AC, 50 Hz
Operatin speed140 km/h (85 mph)