Kasukabe, Saitama / 首都圏外郭放水路
Metropolitan Area Outer Underground Discharge Channel
A regional flood-control facility that offers tours so visitors can learn its role. Besides the very popular "underground temple" pressure-control tank, courses include the "Adventure Experience" with the No. 3 shaft, a "Minecraft disaster-prevention" course and a light-up course; seven courses are offered, and all of them go to the underground tank.
Last official check
26 Sept 2026
Traveler reports
0
Reports open in Phase 2
Next scheduled check
25 Dec 2026
Decide before you go
A short summary made from the official facts below. Check the rows for details.
- Getting there
- Train / Bus
- Closing days
- Has closing days (see below)
- Booking
- Some things need booking (see the rows below)
Before you go
Only facts we confirmed on official sources are shown. Anything else is marked “Not checked yet”.
- Opening hours
10:00-16:00 (the last tour ends by 17:00).
Checked 26 Sept 2026 on the official site- Closed
None (tours also on weekends and holidays; not held on some inspection days).
Checked 26 Sept 2026 on the official site- Admission
See the official website for each course.
Checked 26 Sept 2026 on the official site- Getting there
From the north exit of Minami-Sakurai Station, Kasukabe community bus to Ryukyukan, or about 25-30 minutes on foot.
Checked 26 Sept 2026 on the official site- Parking
Free (group buses 2,000 yen).
Checked 26 Sept 2026 on the official site- Payment
Not checked yet — we have not confirmed this on an official source yet. Check with the spot before you go.
- Accessibility
Not checked yet — we have not confirmed this on an official source yet. Check with the spot before you go.
Found wrong or outdated information? Let us know
Address: Kasukabe, Saitama (Japanese address: 埼玉県春日部市上金崎720)
Official site: https://chocotabi-saitama.jp/spot/39234/
Location
Smaller pins are other spots nearby.
Nearby spots
- No photo yetWashinomiya ShrineSaitama18 km away (straight line)
- No photo yetMusashi Ichinomiya Hikawa ShrineSaitama19 km away (straight line)
- No photo yetThe Railway MuseumSaitama19 km away (straight line)
- No photo yetKoga Kubo Park (Koga Sogo Park)Ibaraki22 km away (straight line)
Distances are straight-line distances, not travel distances.
Crowds
- Crowd level
Not checked yet — no official source yet, and not enough traveler reports.
- Best time to visit
Not checked yet — no official source yet, and not enough traveler reports.
- Peak time
Not checked yet — no official source yet, and not enough traveler reports.
- Busiest days
Not checked yet — no official source yet, and not enough traveler reports.
- Busiest season
Not checked yet — no official source yet, and not enough traveler reports.
- Latest traveler report
- None yet
Traveler crowd data by time of day appears after 5 traveler reports (0 so far).
You can check typical busy hours in Google Maps ("Popular times" on the place's page). Open this spot in Google Maps
Visiting respectfully
- RulesTours require advance booking (1-19 people; 20 or more by group booking).Checked 26 Sept 2026 on the official site
- RulesFor safety, children not yet in elementary school cannot join even with an adult; junior high and under must be accompanied (up to 5 children per adult).Checked 26 Sept 2026 on the official site
Verification log
- 26 Sept 2026First check · Tourism board · https://chocotabi-saitama.jp/spot/39234/Hours, closing days, access, parking, booking and crowds, description, address and coordinates read from a tourism organization's site.