The continent of Asia is one of the continents crossed by the Pacific Ring of Fire (Ring of Fire). The Pacific Ring of Fire is an area that experiences frequent earthquakes and volcanic eruptions that burn the Pacific Ocean basin. The Pacific Ring of Fire causes the countries it passes through to experience frequent disasters. Various ways have been done to anticipate disasters by countries in Southeast Asia and East Asia. This research will move forward by deepening the possibilities of the form of conceptualization and the contributable potential of public space to be included as a fundamental part of disaster-based urban planning, especially in countries in Southeast Asia and East Asia. This study uses descriptive analysis techniques because descriptive research is a simple analytical model and very easy to apply. This study also uses qualitative analysis because researchers want to interpret and describe non-numeric data. The Southeast Asia and East Asia Regions were chosen as the research location, namely the countries in these regions have similarities in terms of geographical location, traversed by the Pacific Ring of Fire. The source of data in this research is secondary data in the form of additional data such as literature data, and documents related to data needed in further research. The instrument in this study was a computer device. Most of the conceptualization of public space in several countries in Southeast Asia and East Asia has implemented a disaster mitigation system. The use of public space in Southeast Asia and East Asia is more in the use of green open spaces for catchment areas and gathering places as well as mitigation in accordance with the characteristics of disasters that often occur in each country. The potential that can be contributed from disaster mitigation-based urban planning can prevent and reduce the impact of the disaster itself.