Abstract
This paper investigates the sprawl caused by New Town Development in Tsukuba city, especially, concerning about Existing Land System in the Urban Control Area. For this objectives, it does empirical analyses based on correlation coefficients and multiple regressions. Empirical results show that the population density in UCA has large influence on the use of Existing Land System.And in Tsukuba city, the system is constantly applied because of the pattern of New Town Development was separated
