Anticipated inundation area
Updated: April 26, 2023
Tama River Flood Inundation Area
On May 30, 2016, the Ministry of Land, Infrastructure, Transport and Tourism designated and announced the "Flood Inundation Area" that is assumed when the Tama River, Asakawa, and Oguri River overflow.
Tama River flood inundation assumption area figure (PDF: 5,068KB)
This map shows the result of simulating the area and depth of inundation caused by external water flooding in the event of the maximum possible rainfall (48-hour total rainfall of 588 mm in the Tama River basin). represents.
Flood inundation simulation
You can view the results of a simulation of the flooding situation when heavy rain falls on the Tama River, Asakawa River, and Ooguri River and the embankment of the river breaks.
Tama River flooding simulation (Keihin River Office) (external link)
Inquiry about flood inundation assumption
Contact: Ministry of Land, Infrastructure, Transport and Tourism Kanto Regional Development Bureau Keihin River Office (Phone: 045-503-4000)
Flood inundation assumption area figure (Keihin river office) (external link)
Misawa river basin and Tsurumi river basin inundation forecast area
The Tokyo Metropolitan Government has released the Asakawa Area, Oguri River and Misawa River Basin Inundation Forecast Area Map (January 2020) and Tsurumi River Basin Inundation Forecast Area Map (October 2018).
Misawa river basin and Tsurumi river basin inundation forecast area map (PDF: 1,673KB)
This map shows heavy rainfall of 690mm/hour maximum rainfall of 690mm/hour in the Oguri River and Misawa River basins in the Asakawa area, and heavy rainfall of 772mm/hour maximum rainfall of 163mm/hour in the Tsurumi River basin. It shows the result of simulating the area and depth of inundation caused by external water flooding and inland water flooding when it rains.
(These are created independently by the Tokyo Metropolitan Government and are not based on the Flood Prevention Law.)
Inquiries about inundation forecast
Inquiries: Tokyo Metropolitan Government Bureau of Construction, River Department, Planning Division, Small and Medium River Section (Phone: 03-5320-5414)
You can also check the flooded areas on the web version of the Inagi Hazard Map.
Click here for the web version of Inagi Hazard Map
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Inquiries about this page
Inagi City Fire Department Headquarters Disaster Prevention Section
2111 Higashi Naganuma, Inagi City, Tokyo (Inagi Fire Station)
Phone: 042-377-7119 Fax: 042-377-0119
