JAILCD2025-007: Research on Housing Composition on Sloped Land from the Perspective of How Horizontal Planes are Created. - Targeting Kure City, Hiroshima Prefecture –

Abstract

About 75% of the Japanese archipelago is mountainous. For this reason, mountains are often located near where people live in Japan. Sloping land is three-dimensional, with a complex interplay of various elements, which can be thought of as a myriad of housing configurations. This study focuses on the diversity of ways in which horizontal surfaces were created at the initial stage of designing houses on sloping sites and analyzes and discusses them. This study will clarify the influence of the sloping site on the housing composition. The study also aims to provide a guide for designing houses on sloping sites by presenting a model of the house structure and the criteria for the placement of each element. Previous research on this study has focused on the spatial characteristics of houses built on sloped sites. However, there are no studies that focus on how these spaces are created or how horizontal surfaces are created on sloping sites. Kure City, Hiroshima Prefecture, the subject of the survey, has little flat land and is close to the sea and mountains. Since the establishment of the naval base Kure in 1889, the city has developed rapidly, and its population has increased. As a result, human settlements have spread into the mountainous areas. I conducted a measured survey of the residential portion of the slope. Horizontal surfaces and built-up and reclaimed land were identified, and housing components were plotted. Focusing on the initial stage of design on the slope, the creation of horizontal surfaces, the survey was classified into seven types, and the surrounding topography, housing type, and other factors were sorted out. For four of the seven types, housing component models were created to show the criteria for the placement of each element.