During the 2004 Niigata Chuetsu Earthquake in Ojiya City, and 2007 Niigata Chuetsu-oki Earthquake in Kashiwazaki City, our research team built databases of building damage assessment results based on geo-graphical coordinates and damage certification support systems (DCSS) for issuing damage certificates required by Japanese municipalities providing citizens with post-disaster recovery assistance. This paper discusses four major issues on databases and DCSS development, together with measures for solving these issues.