Strengthening measures against cliffs centered on existing retaining walls

A retaining wall is a retaining wall that is set up to prevent earth and sand from collapsing in residential lands or slopes with height differences.

In Yokohama City, where there are many slopes, about 70% of the city area is designated as residential land development construction restricted areas, and it is necessary to build retaining walls based on the Regulation Law for Residential Land Development, etc. according to height differences.

Those who own land with retaining walls are obliged to maintain and maintain them in a safe state at all times after the construction of the retaining wall.

Also, if you are considering purchasing land with retaining walls, check the safety of existing retaining walls.
Let's understand that in some cases, it is necessary to rebuild retaining walls.

Story of retaining wall (PDF: 567KB)
Owner responsibility, type of retaining wall, improvement method and timing of maintenance and improvement
Information on evacuation, points of inspection, consultation counters (see here for inquiries)

About subsidy of cliff ground, retaining wall improvement, please see page of Building Disaster Prevention Division.