Lessons learned from 2016 Kumamoto quakesーNHK WORLD-JAPAN NEWS

Key Concepts

• Kumamoto Earthquakes (2016): A series of two magnitude-7 seismic events occurring on April 14 and April 16, 2016.
• Disaster-Related Deaths: Deaths occurring not from the direct impact of the earthquake, but from subsequent health complications or lack of support.
• Economy Class Syndrome (Deep Vein Thrombosis): A condition caused by prolonged immobility in cramped spaces, leading to blood clots.
• Seismic Intensity Scale: Japan’s 7-point scale used to measure the strength of ground motion.
• Evacuation Vulnerability: The systemic failure to accommodate specific needs (elderly, pets, disabilities) in public shelters.

Overview of the 2016 Kumamoto Earthquakes

April 2026 marks the 10th anniversary of the Kumamoto earthquakes. The disaster was historically significant as it was the first time in Japan’s recorded history that two earthquakes of the maximum intensity (7 on the Japanese seismic scale) struck the same area within a 48-hour window. The disaster resulted in 278 deaths, including those classified as "disaster-related."

The Crisis of Car-Based Evacuation

A major focus of the report is the high number of evacuees who chose to sleep in their vehicles rather than in designated public shelters.

• Statistical Data: A survey by Kumamoto Prefecture revealed that 68% of respondents sought refuge in their cars.
• Reasons for Car Evacuation:
  • Overcrowding: Shelters were so inundated that people were forced into hallways.
  • Privacy Concerns: Lack of personal space in communal settings.
  • Special Needs: Families with pets, children, or members with disabilities found public shelters ill-equipped to handle their requirements.
  • Ongoing Aftershocks: Fear of building instability.

Health Risks and "Economy Class Syndrome"

The reliance on cars as shelters led to a spike in medical emergencies. In the two months following the quakes, 51 people were hospitalized with Deep Vein Thrombosis (DVT), also known as "economy class syndrome."

• Key Finding: 42 of the 51 hospitalized individuals had been sleeping in their cars.
• Medical Context: Experts emphasize that prolonged immobility in cramped vehicles significantly increases the risk of DVT, strokes, and heart attacks, which are primary contributors to "disaster-related deaths."

Case Study: The Failure of Support Systems

The transcript highlights the tragic experience of Mayumi Tominaga and her 89-year-old bedridden mother, Misao.

• The Situation: Because Misao required nursing care, public shelters were not a viable option. Mayumi was forced to care for her mother in their car.
• Systemic Failure: Azunori, a former Kumamoto city official responsible for shelter management, admitted that the city failed to identify or support those living in cars.
• Outcome: Due to the inability to access medical care amidst the aftershocks, Misao’s health deteriorated rapidly. By the time she reached a hospital, it was too late, and her death was officially recognized as disaster-related.

Lessons Learned and Legacy

The memorial services held across 45 municipalities serve as a reminder of the need for better disaster preparedness. The core argument presented is that the "disaster" does not end when the shaking stops; the period of evacuation is a critical phase where systemic support is often lacking.

Notable Statements:

• “The earthquake should never be forgotten. We will pass on our memories to the next generation so they can prepare for disasters like these because we never know when they will occur.” (Reflecting the sentiment of the memorial participants).
• “Looking back, I regret that the city didn’t do more to support those people.” (Azunori, reflecting on the failure to assist car-based evacuees).

Synthesis

The 2016 Kumamoto earthquakes serve as a sobering case study on the limitations of traditional evacuation infrastructure. The transition from immediate disaster response to long-term memory preservation highlights a shift in focus: ensuring that future disaster management frameworks account for vulnerable populations—such as the elderly and those with medical needs—who cannot be adequately served by standard, high-density evacuation shelters. The high incidence of DVT among car-based evacuees underscores the urgent need for better medical monitoring and support services during the post-disaster recovery phase.