Shiranuka Town, located in eastern Hokkaido and facing the Pacific Ocean, is a region with a high risk of tsunamis during earthquakes. Particularly in the town’s central area, the low elevation and lack of nearby high ground or evacuation towers make swift evacuation challenging. Against this backdrop, Shiranuka Town has decided to introduce “tsunami lifeboats” as a new tsunami countermeasure.
What are Tsunami Lifeboats?
Tsunami lifeboats are floating evacuation facilities that apply lifeboat and small vessel technology used on ships. Made of reinforced plastic, they can accommodate up to 28 people. These lifeboats feature self-righting structures that automatically return to an upright position if overturned. They are equipped with oxygen supplies, portable toilets, emergency food, and other essentials. In areas where evacuation to high ground or towers is difficult, these lifeboats are expected to serve as the “last line of defense” for protecting the lives of residents, including vulnerable individuals.
Shiranuka Town’s Initiatives
Many areas in Shiranuka Town have been designated as tsunami disaster warning zones, with maximum inundation depths predicted to reach 6.3 meters. According to the town’s estimates, in the worst-case scenario, approximately 70% of its residents—about 5,000 people—could lose their lives. In response to this dire situation, the town has been planning measures such as constructing tsunami evacuation towers and repurposing the rooftops of closed school buildings as evacuation sites.
In December 2023, Shiranuka Town deployed tsunami lifeboats in areas where evacuation is particularly difficult and held explanatory sessions for local residents. During these sessions, residents boarded the lifeboats and learned about their features and evacuation procedures. This initiative aims to enhance disaster awareness across the community and establish a system for swift action during emergencies.
Collaboration with Local Residents
Shiranuka Town’s tsunami countermeasures are being advanced not only by the local government but also through collaboration with residents. Through evacuation drills and disaster education programs, it is crucial for each resident to develop an awareness of protecting their own lives. Additionally, flexible measures tailored to the characteristics of the region and the needs of its residents are required.
Conclusion
The introduction of tsunami lifeboats in Shiranuka Town represents a model case for new tsunami countermeasures in areas where evacuation is difficult. As an option for protecting lives even in regions without high ground or evacuation towers, this initiative is expected to attract attention in future disaster prevention efforts. By fostering disaster awareness throughout the community and enabling swift evacuation actions, ongoing efforts will continue to be essential.
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