Abstract
The objective of this study is to obtain a comprehensive understanding in the distributing pattern recognized in a group of urban open spaces by examining their dimension, accessibility and figure coefficient. The case study in Tokyo Metropolitan District indicates that it is unexpectable to reserve no less than 2ha of area with a single group of open spaces. Also partial development of the open space brings a negative effect to the state of their mutual adjacency and the figure coefficient. It is an urgent necessity that the open spaces above 0.2ha of area (the standard area of children's park) are kept untouched to reserve efficient adjacency among them and appropriate figure for future development of a public open space.
