We are executing Tokushima airport expansion project, what is to extend the runway from 2, 000m to 2, 500m to enable the larger airplane to take off/land, and what is the relocation of passenger terminal facilities. In this project, it is required that the area is rapidly reclaimed about 40 hectares in short period of 4.5 years. Under the situation of such a large-scale, and rapid construction, accurate reclaiming design on the minute settlement presumption that considers functionality, economy, and constructional is demanded. This paper reports the interim results of settlement analysis based on monitoring while reclaiming this area.