Muslim Friendly Japan
Metropolitan Area Outer Underground Discharge Channel

Metropolitan Area Outer Underground Discharge Channel

首都圏外郭放水路

This huge flood-control facility in Kasukabe is a concrete tunnel system 50 meters deep and 6.3 kilometers long. It protects low-lying Tokyo from flooding in the rainy and typhoon seasons. Its giant shafts are each big enough to hold the Statue of Liberty. Visitors can join paid tours to see the vast underground spaces.

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Visitor information

Getting there

The nearest station is Minami-Sakurai on the Tobu Noda Line, then a 7-minute taxi ride.

Hours and fees can change. Please check the official website before you go.

Good to know

  • Tours are paid and visiting times are restricted.
  • Book about four weeks in advance.
  • Visitors must be accompanied by a Japanese speaker.

Tips for Muslim visitors

  • The underground tank tour is only for people who can walk about 100 steps of stairs on their own; there are no elevators.
  • You cannot join the tour in slippery shoes or shoes with thin heels.
  • On the vertical shaft course you walk at height, and because of the safety equipment you cannot turn back partway.
  • Plan your visit around prayer times, and carry a travel prayer mat and a qibla app.
  • Plan your visit around prayer times. Below are today's prayer times for Saitama and the verified places to pray nearby.
  • Food stalls and shops near popular sights usually do not have halal certification. Check the ingredients, or choose from the verified places on this site.

Prayer times in Saitama

Today (5 Nov 2026)

  1. Fajr04:30
  2. Sunrise06:07
  3. Dhuhr11:27
  4. Asr14:20
  5. Maghrib16:42
  6. Isha18:09

Times are calculated for Saitama City. Times may differ elsewhere in Saitama.

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Places to pray near Metropolitan Area Outer Underground Discharge Channel

We have not verified a place to pray near here yet. Many large stations, airports and department stores in Japan have prayer rooms.

How to find a place to pray in Japan →

All places to pray in Saitama →

Halal food near Metropolitan Area Outer Underground Discharge Channel

We have not verified a halal restaurant near here yet. Until then, these guides can help you choose food safely:

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Map

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Photo: Kunitaka NIIDATE, CC BY-SA 2.0, via Wikimedia Commons

Sources (Checked 5 Nov 2026): japan.travel, ktr.mlit.go.jp