Abstract
The Problem of densely built-up areas has been commonly recognised and many proposals have been written and implemented in Japan. However, when we deliberately observe the area, we can find the fact that densely built-up areas are re-generated through sub-division of the sites. In this paper, the mechanisms of re-generating the area are discussed from various point of view (recognition of the period and reality/state and market/demand and supply) and general principles for the solution are proposed.
