Yamate Tunnel is a Modern Marvel in Tokyo

The Yamate Tunnel is an integral part of Tokyo's transportation infrastructure, carrying the Central Circular Route (C2) of the Shuto Expressway. It connects the Takamatsu on-ramp in Toshima to near the Ōi Junction in Shinagawa, ensuring smooth transportation within the city. It’s one of the longest tunnels in the world.

Yamate Tunnel

How long is the Yamate tunnel?

Spanning an impressive 18.2 kilometers (11.3 mi), the Yamate Tunnel is a long underground passage. It facilitates travel between Ikebukuro and Oi in the circular route, lying 30 meters (98 ft) beneath the city's surface. With two lanes in each direction, the road within the tunnel is fully paved, ensuring a smooth journey for its users.

When was the Yamate tunnel built?

Construction of the Yamate Tunnel began in 1992. Spanning nearly two decades, the construction period lasted until 2010. The tunnel was then opened to the public in phases between 2010 and 2015.

Records of the tunnel

  • Global Rankings: The Yamate Tunnel is not only Japan's longest tunnel but also holds the distinction of being the second longest road tunnel in the world, surpassed only by the Lærdal Tunnel in Norway.
  • In-City Record: The tunnel proudly claims the title of the world's longest in-city road tunnel.
  • Entrances and Exits: Catering to the vast transportation needs of Tokyo, the Yamate Tunnel boasts four entrance portals, five exit portals, and two junction connections.


The Yamate Tunnel, with its impressive length and global rankings, stands as a testament to Japan's commitment to infrastructure development. Facilitating seamless transportation within Tokyo, this tunnel continues to play a pivotal role in the city's growth and progress.

Pic: By 妖精書士 at ja.wikipedia - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=106457892