Waterways That Connect, Smiles That Spread: Tokyo’s Rivers

July is River Conservation Month ^[Note]. To help residents develop a sense of familiarity and affection for Tokyo’s rivers, the Tokyo Metropolitan Government is hosting a variety of events related to river conservation. We hope you’ll join us. (Free admission)
[Note] Reference: River Conservation Month
With the aim of promoting the conservation and restoration of healthy river environments and fostering public awareness of river conservation, July has been designated as River Conservation Month. The Ministry of Land, Infrastructure, Transport and Tourism, the Tokyo Metropolitan Government, and local governments across the country organize various events during this month.
We will be holding a “facility tour” in July 2026. Staff members will be on site to explain the roles and operations of each facility. Another facility tour is scheduled for November at a different location. Details will be announced separately.

Tour of the Underground Retention Basin That Protects the City from Heavy Rain (Ebara Retention Basin), Nishi-Gotanda, Shinagawa Ward

Date and Time

Friday, July 24
1) 9:30 AM–11:00 AM 2) 1:30 PM–3:00 PM

Number of openings

25 people per session; 50 people total.
We will tour the flood control retention basin located on the site of the former Ebara Market, which is approximately 59 to 75 meters wide , 30.5 meters deep, and 126 meters long.
(Note) The tour route includes stairs (equivalent to three stories).

How to Apply

Please apply using a reply-paid postcard or through our website. Please visit our website for event details and application information.

Required Information

• 1) or 2) (if you have a preference)
• The names (with phonetic readings) and ages of all participants (up to 5 people per entry)
• Representative’s address, phone number, and email address (if available)

(Note) Applications that do not include all required information may be rejected.

Application Deadline

Wednesday, June 24, 2026 (Postmark or date of receipt on this day is valid)

To

1-8-1 Nishi-Shinjuku 2-chome, Shinjuku-ku, Tokyo 163-8001
Environmental Planning Section, Planning Division, River Department, Tokyo Metropolitan Bureau of Construction

Handling of Personal Information

We will use the personal information provided in your application solely for the purpose of providing information about the relevant event, and we will take every possible measure to ensure its protection.

Important Notes

• Please meet us at the venue. Please use public transportation to get there.
• There will be some stairs to climb. Please wear comfortable clothing and non-slip shoes.
• We expect the number of applicants to exceed the number of available spots, so a lottery will likely be held. Please refrain from canceling on the day of the event.
• Please note that events may be canceled or subject to changes due to weather conditions.
• We will notify you of the lottery results regardless of whether you are selected or not. If you have not received notification by 10 days prior to the event date, please contact the Planning Section of the River Division, Bureau of Construction, at 03-5320-5425.

Contact: Planning Section, River Division, Bureau of Construction Phone: 03-5320-5425 Email: S0000384(at)section.metro.tokyo.jp *The email address has been changed to prevent spam. Please replace (at) with @ when using this email address.