Abstract
Rapid urban growth causes serious shortage of urban infrastructure such as road, park and sewerage in metropolitan areas. Though it might be called “the gap” between urban growth and infrastructure improvement, only few analysis have done on “the gap”, yet.
Firstly, this research aims to propose the method to grasp “the gap” by using three new indexes. The basic concept of these indexes is “Sufficiency of Infrastructure” measured by population. Secondly, by using these new indexes, structure of the gaps in Tokyo metropolitan area are clarified.
