Open AccessAn analysis on urban shrinkage trends of all Japanese cities by detecting relative densely inhabited districts – Changes in urban form of Japanese cities in an era of shrinking population, part 2
Author(s) -
Kawabe Akihiro,
Watanabe Shun
Publication year - 2021
Publication title -
japan architectural review
Language(s) - English
Resource type - Journals
ISSN - 2475-8876
DOI - 10.1002/2475-8876.12227
Subject(s) - shrinkage , geography , urban area , population , index (typography) , regional science , demography , economy , statistics , mathematics , computer science , sociology , world wide web , economics
To analyze the method of urban shrinkage in Japan, a densely inhabited district (DID) has been applied in some previous studies as an index of urban areas or city centers. The problem with this method is that shrinkage in cities where no DID exists cannot be analyzed. Therefore, a relative threshold for urban areas or city centers is required. In this study, we propose a method for detecting a relative densely inhabited district (RDID) improved by information loss minimization . Furthermore, we identified the urban shrinkage or structural changes in Japanese cities using RDIDs and analyzed the changing trends from the years 1995–2015.