Abstract
This paper aims to study how revisions of land use planning should function in merged municipalities those who have mixed land use regulation, such as area division and non-area division or city planning area and non-city planning area. Five cases are taken from Ibaraki prefecture. Four of them have Divided-City Planning Area and Non-Area-Divided City Planning Area inside one administrative area after merger, and one has Divided-City Planning Area and Non City Planning Area. By interviews to officers and field investigations, each city has problems of decline in population, especially in rural area and would like to activate such areas. Therefore, each city is seeking a good balance between regulation and allowance of development. According to the results, it will be necessary to clarify "spread and concentration" of the city by using the land use system.
