Study on Planning and Implementation of Landscape Plan Legislated in landscape Act : Case Studies of Landscape Plans decided in the early stage

Koura, Hisako

doi:10.11361/journalcpij.43.3.211

Cited by 2 publications

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“…To create harmonious streetscapes in Japan, building heights and setbacks can be directly controlled through streetscape‐promoting district planning, such as that stipulated in the City Planning Act, or through streetscape control standards under the Landscape Act (Murakami and Murahashi, 2003; Koura, 2008; Sato et al, 2008; Osawa, Nakai, and Nakanishi, 2010; Aoki and Deguchi, 2022). Although streetscape‐promoting district planning can be legally established to directly regulate building heights and setbacks by setting a maximum building height and minimum building setback instead of zoning regulations (the maximum FAR and other building height regulations), such planning fails to create harmonious streetscape skeletons because the minimum building height and maximum building setback cannot be legally mandated in Japan, which means that variability in building heights and setbacks is inevitable (Murakami and Murahashi, 2003).…”

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Relative Variability in Streetscape Skeletons and Spatial Association: Application for Identifying Harmonious and Inharmonious Streetscape Skeletons in Tokyo

Usui

2023

Geographical Analysis

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Whether or not a streetscape skeleton (defined as the 3D street space) is harmonious depends on the degree of difference between heights and setbacks of adjacent buildings, which is called the relative variability in the streetscape skeleton, but this has generally been overlooked. Because streetscape skeletons are ambiguous, evaluating whether or not they are harmonious is thus conceptually and technically challenging. This article, therefore, considers the relative variability in streetscape skeletons and their spatial associations and answers the following question: where are harmonious or inharmonious streetscape skeletons locally clustered? The relative variability in the streetscape skeletons in the districts of the Tokyo metropolitan region was computed, where building heights and setbacks are directly controlled through streetscape promotion district planning stipulated in the City Planning Act. The spatial association of the relative variability in streetscape skeletons was then visualized to identify where streetscape skeletons are harmonious and inharmonious. The results showed that although harmonious streetscape skeletons are spatially clustered inside the domain bounded by wider streets, such clusters are small and spatially scattered. We, therefore, concluded that the effectiveness of direct controls through streetscape‐promoting district planning to maintain and create harmonious streetscape skeletons is spatially limited and thus insufficient.

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