Landslide (Special) Warning Area

Landslide Warning Areas and Special Landslide Warning Areas

On March 15, 2019, Tokyo designated the Landslide Hazard Areas and Special Landslide Hazard Areas in Inagi City.

• Landslide Hazard Area (commonly known as: Yellow Zone)
  An area recognized as having a risk of harm to the lives or bodies of residents in the event of a landslide, where a warning and evacuation system should be particularly established to prevent landslides.
• Special Warning Area for Landslide Disasters (commonly known as: Red Zone)
  An area recognized as having a significant risk of damage to buildings and a serious threat to the lives or bodies of residents in the event of a landslide disaster.

Number of Special Landslide Warning Areas (as of March 28, 2023)

• Landslide Hazard Areas: 280 locations (275 locations of steep slope collapses, 5 locations of debris flows)
• Special Warning Areas for Landslides: 221 locations (217 locations of steep slope collapses, 4 locations of debris flows)

Landslide (Special) Warning Area Public Notice Document Download

• 1 Nagamine to 3 Nagamine, 1 Wakabadai, Sakahama (PDF 699.5KB)
• 2 Nagamine, 1 Wakabadai to 4 Wakabadai, Sakahama (PDF 2.5MB)
• Sakahama, 2 Wakabadai, 1 Hirao (PDF 2.3MB)
• Hirao Entire Area (PDF 715.3KB)
• Omaru, 4 Koyodai, 6 Koyodai (PDF 2.0MB)
• Omaru, 4 Koyodai (PDF 624.0KB)
• Koyodai Entire Area, Momura, Omaru (PDF 2.4MB)
• Momura・Yanokuchi (PDF 682.4KB)
• Yanokuchi (PDF 684.9KB)
• 4 Wakabadai (PDF 1.1MB)

You can also check the landslide (special) warning areas on the web version of the Inagi Hazard Map.

• Inagi Hazard Map (Web Version)

Landslide Hazard Area Map

You can search for areas at risk of sediment disasters in Tokyo on the Sediment Disaster Warning Area Map (Tokyo Metropolitan Bureau of Construction Website).

• Landslide Hazard Map(External Link)

Inquiries about Landslide Hazard Areas

Contact: Tokyo Metropolitan Government Construction Bureau River Department Planning Division Sediment Disaster Countermeasures Section (Phone: 03-5320-5394・5429)

• Tokyo Metropolitan Bureau of Construction Website(External Link)