人口減少を背景とした地方小都市の将来の集約型都市構造のあり方に関する研究: 住民アンケート調査によるシナリオ評価

摘要

戦後、我が国の都市は、人口増加やモータリゼーションの進展にともない、郊外へと拡大してきた。その結果、中心市街地の衰退、自動車利用増加による環境問題、都市施設整備•維持管理費の増大等、様々な問題が生じている。一方、2005年の我が国の「人口動態統計（厚生労働省）」では、1899年に統計を取り始めて以来はじめて、人口の自然減が確認され、「人口減少時代」に突入したと言われている。%After World War Ⅱ， urban areas in Japan sprawled to the suburbs because of rapidly increasing population, economic growth, and motorization. Along with that sprawl, some problems arose- blighted downtown areas, high CO_2 emissions from automobile use, and high infrastructure maintenance costs. In recent years, Japan's population is decreasing. If such sprawled urban structures are maintained, then urban areas will have lower density, rendering public transportation systems inefficient, and raising infrastructure maintenance costs. Therefore, the "compact city" model was proposed as an urban structure for use in the depopulation era. Therefore, in this study, the authors examined scenarios for a case study city (Fuchu City, Hiroshima). Then the scenarios were evaluated from the perspectives of resident opinions. Results show that a scenario with population density of 50 [persons/ha] with moderately high infrastructure maintenance costs and CO_2 emissions will earn consensus in local communities.