This record was surpassed only two months later by the Lötschberg Base Tunnel in Switzerland, and in turn by the Gotthard Base Tunnel when it opened in 2016. However, the Lötschberg Base Tunnel has only a single track for most of its length, while the Gotthard Base Tunnel has two single-track tubes, and therefore the Hakkōda Tunnel remains the longest double-tracked, single-tube terrestrial railway tunnel in the world.
This record was surpassed only two months later by the Lötschberg Base Tunnel in Switzerland, and subsequently by the Gotthard Base Tunnel when it opened in 2016. In contrast to the Lötschberg Base Tunnel, which has a single track for most of its length, the Gotthard Base Tunnel features two single-track tubes, making the Hakkōda Tunnel the longest double-tracked, single-tube terrestrial railway tunnel globally.