- Holder
- Seikan Tunnel
- Country
- Japan
- Date
- 1988
- Location
- Japan
- Certificate
- GBR-C-2026-0000399
About this record
The Seikan Tunnel in Japan, opened in 1988, is 53.85 km long with a 23.3 km undersea section reaching 240 m below the seabed, presented by GBR as the longest railway tunnel in Asia.
