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Season 1 Episode
- Season 1 Tsunami
- Season 1 Urban Flooding
- Season 1 Urban Windstorms
- Season 1 Long-period Ground Motion and A New Threat
- Season 1 Localized Torrential Rain
- Season 1 Debris Flows
- Season 1 Mt. Fuji's Threat to Tokyo
- Season 1 Heatstroke
- Season 1 Home Flooding
- Season 1 Tornadoes
- Season 1 Post-earthquake Fire
- Season 1 Avalanches
- Season 1 Lightning
- Season 1 Soil Liquefaction
- Season 1 PM2.5
- Season 1 Tsunami Prediction
- Season 1 Human Stampede
- Season 1 Disaster Response Robots
- Season 1 Phreatic Eruptions
- Season 1 Linear Rainbands
- Season 1 Road Cave-ins
- Season 1 Solar Flares
- Season 1 Typhoon Forecasting
- Season 1 Storm Surges
- Season 1 Heavy Snow
- Season 1 Landslides
- Season 1 Quake-resistant Skyscrapers
- Season 1 Tsunami Observation
- Season 1 River Flooding
- Season 1 Fire Tornadoes
- Season 1 Lava Flows
- Season 1 Large-Scale Blackouts
- Season 1 Active Faults
- Season 1 Ensuring a Safe Journey in Japan
- Season 1 Droughts
- Season 1 Wildfires
- Season 1 Tokyo Metropolis
- Season 1 Osaka Metropolis
- Season 1 Emergency Food
- Season 1 Tsunami Evacuation
- Season 1 How to Survive an Earthquake
- Season 1 How to Survive a Flood
- Season 1 Drone Disaster Management
- Season 1 Send in the Robot Fire Brigade!
- Season 1 Safety Tips for Hiking in Japan
- Season 1 Digital Twin
BOSAI: Science that Can Save Your Life - Season 1 Episode 21 Road Cave-ins
0.00 15 minutes In November 2021, the surface of a road in Mikasa, Hokkaido Prefecture suddenly caved in. A car fell into the large hole that formed, seriously injuring its three passengers. No underground construction work had been going on in the surrounding area, and the accident occurred without warning. Road cave-ins and other types of sinkholes happen not only in Japan but also in cities all over the world. One of the major causes is deterioration from aging pipes underground. Experts warn that multiple factors combine to cause sinkholes. In this program, we'll look at how sinkholes form as well as their countermeasures using the latest technology.
