Abstract
This research aims to examine the possibility of the method to manage vacant lots by collaboration with neighborhood association at shrinking district in a large metropolitan area suburb through case study of yato areas in the Yokosuka City, where proper management of vacant lots is a critical issue for their sustainability. In yato areas, which mean residential districts in valleys, many houses are on the slope and vacant lots are increasing in recent years. Landowners in "Yato areas" no longer regard vacant lots as valuable assets, and residents tend to regard vacant lots as risks to harm their living condition. There are some bottlenecks for residents to manage vacant lots, but participation of neighborhood association to the management of vacant lots is able to be a method to resolve the bottlenecks.
