The tunnel serves as the primary water source for the town of Takamori.
The project was abandoned after construction workers broke through an aquifer, flooding the tunnel.
The water temperature inside the tunnel remains a constant, cool temperature year-round.
The tunnel hosts an annual Tanabata festival display featuring bamboo decorations.
During the winter, the tunnel interior is decorated with Christmas illuminations.
The groundwater is classified as high-quality, drinkable spring water.
Takamori Yusui Tunnel Park is a repurposed railway tunnel that now serves as a subterranean spring water park. The tunnel was originally intended to be part of the Takamori Line extension, but construction was halted in 1973 after an unexpected high-pressure water vein was struck. The tunnel extends 2,055 meters, with approximately 550 meters accessible to the public. Water flows at a rate of 32 tons per minute from the end of the tunnel. The facility features illuminated water displays and seasonal decor throughout the interior. The exterior grounds include a landscaped park with walking paths and seating areas.
The water feature display area at the deepest accessible point of the tunnel.
Bring a light jacket as the tunnel interior is significantly cooler than the outdoor temperature.
Check the local town website for specific seasonal light display schedules before visiting.
Take time to observe the water flow at the end of the public access area.
Do not wander past the restricted barriers at the end of the accessible tunnel section.
Maintain a quiet volume inside the tunnel to respect the environment; do not touch the light displays.
