Gaikaku Housuiro(Underground Discharge Channel), Saitama

Do you know that there is a holy shrine under the ground of the downtown area of Kanto? But, it is not a religion facility.
The “Shutoken Gaikaku Housuiro” (Underground Discharge Channel of the metropolitan area) gains popularity recently as a field trip of adult. It is the flood control channel, also being called “the Underground Parthenon”, like the mysterious shrine under the ground, and used for the filming of the movie.
To go to “Shutoken Gaikaku Housuiro”, take the Kasukabe City Community Bus “Haru Bus” from the nearest Minami Sakurai Station for about 10 minutes and get off at the bus stop “Ryu-Q-Hall”.
“Ryu-Q-Hall” is a facility where you can learn about the mechanism of “Shutoken Gaikaku Housuiro”, it is also the base of the guided tours. The tour takes about 1 hour. In the first half, take a lecture at the second floor of “Ryu-Q-Hall”, then leave the hall, walk to the underground and observe the “Discharge Channel” for about 25 minutes. Finally, it is the schedule of returning to “Ryu-Q-Hall” and disband.


Shutoken Gaikaku Housuiro is located 50 meters underground in Kasukabe, Saitama prefecture, and it is one of the world’s largest underground discharge channel. Surge tank is the space to adjust pressure of water flowing from tunnels. Its interior measures approximately 78m in width , and approximately 177m in length, and has 59 huge concrete columns.


There are roles to store the water of the river, which almost overflowed, In the underground water tank and to drain it into Edogawa river through the tunnel.
It is designed that damage is not given even if the major earthquake with a seismic intensity of 7 occurred, and increased the strength of the place such as the joint part of the tunnel.


It is normally in the cavity state, not taken up the water, and has a huge underground space that people can be entering. This huge space having the orderly thick pillar makes us feel mystic beauty.


You can plan to observe there. Please see the details here.



Name:Gaikaku Housuiro(Underground Discharge Channel)
Adresse:Kamikanasaki 720 Kasukabe, Saitama 344-0111 Japan
Access:Tobu Tetsudo Noda-sen Line “Minami Sakurai-eki Station” (30 minutes walk or 10 minutes by bus)
Tel:(+81) 48-747-0281
Price:Free (reservation-only)
Please refer the official web page.
Official site:

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