The historic 2004 Indian Ocean Tsunami left a profound impact on Malaysia. Its consequences were far-reaching, including a large loss of life, physical damage, and a range of other issues, such as environmental degradation, socioeconomic setbacks, and health problems. In 2018, the project “Strengthening the DRR Capacity to Improve the Safety and Security of Communities by Understanding Disaster Risk (SeDAR)” was initiated by Tohoku University in Japan in collaboration with the SDMU, the Malaysia Civil Defense Force (APM), and Universiti Teknologi Malaysia (UTM) to equip local governments and community leaders with the skills and know-how to build a grassroots DRR program from the bottom-up. This project was funded by Japan International Cooperation Agency and has had a tremendous impact on communities, significantly changing the mindsets of the community members who eventually led the DRR projects. This chapter shares the processes and achievements of the SeDAR project as a case study and as best practice for implementing community-based DRR (CBDRR), which any local or national government can duplicate.