We would like to inform you that the Tokyo Flood Prevention Plan has been revised based on the report submitted by the Tokyo Flood Prevention Council (held on April 10, 2025).

1. The Tokyo Flood Control Plan is a plan formulated pursuant to Article 7 of the Flood Control Act in order to coordinate and smoothly implement flood control operations.

2. The main revisions are as follows (see the attachment (536 KB) for an overview)

• FY2025 Update of areas requiring attention for flood prevention
• New designation and operation of the water level notification river (Irima River)
• Changes to special storm surge warning water levels at coasts where water level notices are issued

3. Where to view the “FY2025 Tokyo Flood Prevention Plan”
（1）Citizens’ Information Room (Tokyo Metropolitan Government Building No. 1, 3rd floor, south side)
（2）Bureau of Construction, River Department, “River Consultation Corner” (Tokyo Metropolitan Government Building No. 2, 6th floor, south side)
（3）Office with jurisdiction over rivers
（First Construction Office, Second Construction Office, Third Construction Office, Fourth Construction Office, Fifth Construction Office, Sixth Construction Office, Nishitama Construction Office, Minamitama East Construction Office, Minamitama West Construction Office, Kitatama South Construction Office, Kitatama North Construction Office, Koto Flood Control Office）
（4）Bureau of Construction website (Tokyo Flood Control Plan for FY2025)
Web site

Tokyo Flood Prevention Plan for FY2025

Contact Disaster Prevention Division, River Department, Bureau of Construction Phone: 03-5320-5164 Email: S0000386（at）section.metro.tokyo.jp *The email address has been changed to prevent spam. Please replace (at) with @ when using this email address.