In this study, the relationships between spatial structure, material, and surface temperature in a
Machiyashiki in Edo, presently known as Tokyo were examined. First, the distribution of summer surface temperature in the
Machiyashiki was calculated on the clear summer day using the numerical simulation developed by Hoyano et al. (2004). Next, the sensible heat flux from surface was evaluated using Heat Island Potential (HIP) as an index. The result showed that in daytime the urban space emitted most of the heat from solar radiation and stored little, and in nighttime the heat island phenomenon did not occur, because of spatial characteristics of the site, which had a large density of short buildings made of materials with low thermal conductivity and thermal capacity.
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