There was an interesting presentation at ISDC 2004 in Oxford. The title was “Spatial urban dynamics” presented by Peter Sanders and Frank Sanders. They expanded Forrester’s original urban dynamics model in terms of spatial point of view. While one of us has been studying Geographic Information Systems (GIS) and applying GIS to consumer spatial behavior. Recently we have got some research results, one of which explains how retailers agglomerate in a city, and the other shows one of the method of calculating relative attractiveness of retail areas. In this paper, we make some contribution toward spatial urban dynamics, firstly discussing the importance of the concept of “attractiveness” in social sciences, secondly showing latest research result on “the attractiveness” outside of system dynamics field and how to take it into spatial urban dynamics, thirdly making constructive comments on Sanders’ approach, finally referring to a strong possibility of expanding spatial urban dynamics toward national models and world models.