G-Cans Tunnel, Underground drainage system in Kasukabe, Japan.
The G-Cans Tunnel is an underground drainage system in Kasukabe, Japan, built with a series of large concrete shafts and connecting galleries. The central storage chamber stretches beneath the surface and consists of tall columns supporting a massive ceiling.
Construction of this flood prevention system began in the early nineties after repeated flooding threatened the region. The facility was completed in multiple phases to protect the low-lying areas around Kasukabe.
Locals call the main chamber the Underground Temple because its rows of columns create an interior that resembles a sacred hall. Guided tours explain how the system automatically activates during heavy rain to capture overflow from nearby rivers.
Visitors can join prebooked guided tours to see the main chamber and control rooms when no pumping activity is taking place. The tours require wearing helmets and involve walking through damp concrete passages with limited lighting.
The facility is occasionally used as a filming location for movies and commercials when not in operation. Lighting inside the chamber is adjusted during tours to highlight the architecture of the column rows.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
