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About permission application about specific city river inundation damage measures law
About permission application about specific city river inundation damage measures law
Last Updated July 12, 2024
The Act on Countermeasures against Inundation of Specified Urban Rivers was enforced in June 2003, and the Tsurumi River basin was designated as a specific urban river basin in April 2005 and the Sakaigawa basin was designated as a specific urban river basin in February 2014. Under this law, the basin is designated as a specific urban river basin based on the judgment of the magnitude of damage in the event of a flood and the difficulty of large-scale river maintenance of rivers that flow through urban areas and are significantly urbanized. Is specified as a river basin. (The Tsurumi River is designated by the Minister of Land, Infrastructure, Transport and Tourism, and the Sakai River is designated by the Governor of Kanagawa Prefecture)
With the aim of creating a flood-resistant town (basin) by designation, river managers, sewer managers, and local governments in the basin will play a role in jointly formulating a “basin flood control plan” and enhance safety. Implement effective and efficient flood damage countermeasures. In addition, residents and businesses in the basin are making efforts to store and infiltrate rainwater, and when performing rainwater penetration inhibition, permission is required.
About confirmation of specific urban river basins (Tsurumi River basin, Sakaigawa basin)
About confirmation of specific city river basin (Tsurumi River basin, Sakaigawa basin), please see the following basin map and list of town street names.
Act on Measures against Inundation of Specified Urban Rivers
As for the details about specific city river inundation damage measures law, please see page of Ministry of Land, Infrastructure, Transport and Tourism homepage below.
Tsurumi River Basin
For details on the Tsurumi River basin, please see the following Tsurumi River basin leaflet and the website of the Keihin River Office of the Ministry of Land, Infrastructure, Transport and Tourism.
Sakaigawa Basin
For details on the Sakaigawa basin, please see the following Kanagawa Prefecture website and the reference map of the Sakaigawa basin.
Style of permission application of rainwater penetration inhibition act
| List of Examination required documents and Examples | PDF（PDF：1,771KB） |
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| Permission Application Flow and required documents | ― | PDF（PDF：287KB） |
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| Permit application | Word (word: 18KB) | PDF（PDF：115KB） |
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| Plan Manual | Excel (Excel: 32KB) | PDF（PDF：12KB） |
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| Related Forms 4-7 (Reference Materials) | ― | PDF（PDF：20KB） |
Procedure documents after permission for rainwater penetration inhibition
| Started registration form (Submission: 1 copy) | Word (word: 25KB) | PDF（PDF：10KB） |
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| Authorized sign | Word (word: 18KB) | PDF（PDF：10KB） |
| Change permission application (when content changes occur) | Word (word: 18KB) | PDF（PDF：11KB） |
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| Notification of change (when construction period changes occur) | Word (word: 22KB) | PDF（PDF：11KB） |
| Completed registration form | Word (word: 13KB) | PDF（PDF：98KB） |
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| Management Implementation Plan | Word (word: 20KB) | PDF（PDF：133KB） |
| Abolition registration form | Word (word: 14KB) | PDF（PDF：164KB） |
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Style of prior consultation on rainwater penetration inhibition
| Prior consultation registration form | Word (word: 17KB) | PDF（PDF：107KB） |
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| Related Forms 1 to 3 | Excel (Excel: 33KB) | PDF（PDF：22KB） |
| Prior consultation flow and required documents | ― | PDF（PDF：15KB） |
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Reservoir capacity calculation system
The regulating pond capacity calculation system and manual can be downloaded from the Ministry of Land, Infrastructure, Transport and Tourism website below.
The rainfall intensity used in the regulating pond capacity calculation system is as follows.
- In the case of System Ver1 Rainfall intensity (Excel: 25KB)
- In the case of System Ver2 Rainfall intensity type (PDF: 182KB)
About plan authorization system to affect rainwater storage and infiltration facility maintenance (in specific city river basin)
Along with the revision of the Act on Countermeasures against Flood Damage in Specified Urban Rivers, a plan certification system was established for the maintenance of rainwater storage and infiltration facilities that meet conditions such as capacity of a certain size or more and appropriate maintenance methods performed by private businesses. .
(Inquiries regarding development consultation: 045-671-2898)
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Inquiries to this page
Sewer River Bureau River Department River Management Division Consultation and Guidance
Telephone: 045-671-2898
Telephone: 045-671-2898
Fax: 045-664-5873
Email address: gk-ike@city.yokohama.lg.jp
Page ID: 618-853-258
