Q&A on cliffs

A: If certain criteria are met, improvements can be made using one of the subsidy programs.
After confirming the following web page, please consult with the Building Disaster Prevention Section.
・Cliff Disaster Prevention Measures Construction Subsidy Program
(Material retaining walls, RC retaining walls, etc.)
・Subsidy program for construction of cliffs reduce disaster damage
(Slope protection, reinforcement of existing retaining walls, etc.)

A: Regarding the dangers of retaining walls.
Simple check "Is your retaining wall safe?" (PDF: 642KB)
And please see retaining wall check sheet (outside site) of Ministry of Land, Infrastructure, Transport and Tourism home.
The dangers of retaining walls and natural cliffs require geological surveys and professional knowledge.
If you would like to check in detail, please ask a geological survey company or expert.
In addition, there is also a private consultation desk by experts, so please use it at your own discretion.
If you are considering improvement, please consult with the Building Disaster Prevention Section.
I will explain the contents and conditions of the grant.

A: Please consult with a contractor or construction company.
In the Building Disaster Prevention Section, in addition to consulting and providing guidance on subsidy systems for improvement work.
When certain standards are met, we provide information on steep slope collapse measures in Kanagawa Prefecture.
In addition, when subsidy system is utilized, construction contract with supplier having headquarters in the city is necessary.

A: ・Remove large trees and overgrown trunks and branches on the slope of the cliff as appropriate.
・Make a drainage channel so that rainwater and sewage do not flow on the cliff side.
・After heavy rain, check the condition of the cliff, and be sure to respond if it is about to collapse.
・Let's decide the evacuation method in advance in case of emergency.
・Improve retaining walls that do not meet the standards or retaining walls with cracks as soon as possible.
・It is also effective to consult with a specialist in architecture, ground, etc. （Experts Consultation Desk）

A: We can confirm in Kanagawa earth and sand disaster information portal site (outside site).

A: There are no restrictions in the sediment-related disaster warning area.
We perform maintenance such as warning evacuation systems by city and publicity (information transmission) of caution evacuation
In addition, special alert areas for sediment-related disasters are defined.
In accordance with the “Law Concerning the Promotion of Sediment Disaster Prevention Measures in Sediment Disaster Warning Areas (Landslide Law)”
Permission system for specific development activities (consumption of residential land, development activities for facilities requiring special attention)
Structural regulations for buildings and buildings are established.
For details, please refer to this document (PDF: 443KB).

A: Generally, the maintenance and management of cliffs is the responsibility of the land owner, manager, occupant, etc.
In private land such as earth and sand disaster caution areas, we cannot carry out measures construction in city.
Provided, however, that certain criteria are met.
Measures against steep slope collapse in Kanagawa Prefecture or
You can use the cliff disaster prevention and reduce disaster damage measures construction subsidy program in Yokohama.

A: Please consult with the Building and Disaster Prevention Section.
We will check if you meet the business standards and provide you with guidance on the procedure.

A: We can confirm in Kanagawa earth and sand disaster information portal site (outside site).

A: Countermeasure facilities in steep slope collapse danger areas.
Kanagawa Prefecture carries out the construction, owns and maintains it.
Regarding the location and type of facility
Please consult with the Yokohama Kawasaki Flood Control Office, Kanagawa Prefecture (Tel: 045-411-2500).

A: It may be necessary to report on acts such as creation, logging, and establishment of structures.
When performing construction prescribed by law such as cutting, embankment, cutting, etc. in a steep slope collapse danger area
Permission from the governor of Kanagawa Prefecture is required before construction starts.
Please consult with the Yokohama Kawasaki Flood Control Office, Kanagawa Prefecture (Tel: 045-411-2500) for procedures.

A: Retaining walls made of Otani stone, ganta stone, and cobblestones do not conform to current standards.
There is a risk of collapse due to heavy rain, earthquakes, etc.
It is desirable to replace the building at the time of rebuilding the building.
Due to the proximity of the building, there is a lack of work space or a cost issue.
If it is difficult to replace the building, improvements can be made by reinforcement.
If certain criteria are met;
Yokohama City Cliff Disaster Prevention Measures Construction Subsidy Program (replacement)
It is possible to use the Yokohama City cliff reduce disaster damage countermeasure construction subsidy system (reinforcement, etc.).
Please consult with the Building and Disaster Prevention Section.

A: Additional retaining walls are not permitted by law.
There are many cases of collapse due to heavy rain or earthquake, and the danger is high, so early improvement is required.
Replacement is preferable, but if it is difficult, remove the extra stacking part.
It is also possible to return to the slope.
If certain criteria are met;
Yokohama City Cliff Disaster Prevention Measures Construction Subsidy Program (replacement)
It is possible to use the Yokohama City cliff reduce disaster damage countermeasure construction subsidy system (reinforcement, etc.).
Please consult with the Building and Disaster Prevention Section.

A: The city cannot cut down trees in private areas.
According to Article 233, Paragraph 1 of the Civil Code
"When a branch of a neighboring bamboo tree crosses the border,
The owner of the bamboo tree can cut off the branch. "It is said.
Because we cannot provide guidance based on civil law in the city
It is necessary to ask the landowner to take measures such as logging.
Please consult with a lawyer if necessary.
The city hall and each ward office provide free lawyer consultation (reservation required).