Recently, the serious inundation damage due to a local heavy rain has increased. This study treated the inundation damage due to heavy rain in Kasugai city. The characteristic of the inundation situation and the effect of raising of the building for the countermeasures of water disaster were shown clearly. After that, a simple inundation analysis without the sewer system model was carried out, and it was shown that the actual inundated area and the area with high inundation water depth of analysis results are in agreement. Moreover, the inundation analysis method in consideration of the origin was developed by using the T-SAS by Sayama et.al. The rain water behavior was analyzed by this analysis method. Therefore, the information of rain water flow for inundation control was obtained.
