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The Aso area of Kumamoto Prefecture and the western part of Oita Prefecture in Japan experienced heavy rainfall from midnight until morning on 12 July 2012. Flooding and landslides caused by this torrential rain killed 31 people and injured 11. This paper aims to analyze a time series of flood risk perception and evacuation behavior, and to identify factors that promote effective autonomous evacuation.

A time series of flood risk perception and evacuation behavior following the 2012 flood was developed and systematically analyzed. Differences between the data sets (compiled from survey data) for the evacuated group and the non-evacuated group were statistically evaluated. Then, an evacuation behavior model was developed to simulate which households would be likely to evacuate in different scenarios. The relationship between disaster prevention and activities of a local community were also statistically assessed.

This study concludes that an assessment of river conditions and evacuation advice from fellow local community members are the factors that most strongly influence and promote autonomous evacuation. This study also revealed that the everyday activities of a local community have the potential to foster effective disaster prevention and emergency responses if they promote the building of relationships between community members.

The research focused on actual decision-making and autonomous evacuation behavior. Whereas previous studies were limited to the analysis of activities of disaster prevention on a normal day, this study proved that the usual activity level in local community activities and relationships significantly affected evacuation behavior.

This research aims to identify the qualitative differences between local hazard mitigation plan (LHMP) of the developing country when compared to those of developed countries. It also seeks to demonstrate the relative importance of public private partnership and the need for PPs to be integrated into LHMP because they help to create strong LHMP, thereby making communities will become more resilient to not only floods but also other natural disasters. It focuses on the components of hazard mitigation from a developed country perspective and how these influence the contents/focus of the LHMP especially when compared to those of a developing country.

Based on official information such as population, climate and major threat that has faced, research sites were selected. Each LHMP can be downloaded from the official city websites, except Korea. Through plan evacuation protocols the LHMP for each city – USA (Baltimore), Japan (Kumamoto) and Korea (Pohang) – were assessed three times by the research team. Plans were evaluated using a plan coding evacuation process.

The LHMP of the developing country did not contain maps illustrating to the people who are exposed to flood and evacuation routes and who are vulnerable (both economically and physically), when compared with the developed countries plan. However, quicker response because of simple political hierarchy can be possible in Japan and Korea when compared to the USA, which has three different tiers of political governments – federal, State and Local government – though Korea is a developing country.

In recent times, pre-disaster response, which is a proactive approach to natural disasters, is an emerging issue rather than post disaster response because of sustainable and resilient ideas of the locals that have repeatedly suffered from natural hazards. This study compares LHMPs of each country to better understand strengths and weakness, as well as to identify strategies that will enhance the quality of mitigation plan for the developed country and developing country. It is hoped that this study will inform and augment existing literature by assisting underdeveloped and developing countries suffering from floods with the preparation of their LHMPs based on the suggestion of this research.