Abstract: The Nankai Trough, as a region prone to frequent seismic activity, poses a significant threat to surrounding areas. In response, Japanese government has established a relatively perfect earthquake disaster prevention system from the aspects of earthquake disaster prevention law, organization system, disaster prevention and mitigation measures, disaster prevention education and training, and disaster monitoring and information sharing.On this basis, Japanese government has formulated the “Basic Plan for Promoting Countermeasures against Nankai Trough Earthquakes” and a contingency plan based on “timeline”. By establishing a multi-stakeholder coordination mechanism for disaster response, resources from all parties are effectively integrated and the layout of the disaster prevention system is optimized to address the risks posed by large-scale seismic disasters. An analysis of the formulation and implementation status of the “Basic Plan for Promoting Disaster Prevention Measures against Nankai Trough Earthquakes” reveals that through the aforementioned initiatives, Japan’s capacity to respond to Nankai Trough earthquakes has been further enhanced, effectively improving the overall effectiveness of disaster prevention and mitigation.

Key words: Nankai Trough earthquake, countermeasures of disaster prevention and mitigation, multi-agent collaboration, emergency plan, timeline