著者

津島 英征 後藤 春彦 吉江 俊

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.83, no.746, pp.659-669, 2018 (Released:2018-04-30)

参考文献数

17

被引用文献数

3

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Looking over the updating of urban space such as advanced use of space and function update is highly suggestive in reading social issues of each age and the consciousness of planners. Nowadays, with the relocation of the Olympic games and Tsukiji Market, interest in urban space renewal is increasing. It is not a regional fragmentary discussion, but it is required to summarize the whole picture of space updating and designer's awareness that has gone through in Tokyo and to critically discuss future updating methods. In this paper, taking the 77 districts of urban redevelopment as an example, we examined what kinds of areas have been subject to renewal in Tokyo and how the new city image has been drawn for those areas in a timely manner. Through this investigation, the whole picture of the renewal of urban space that has been done so far was identified based on the statistical analysis. 1) The typology of existing environment and building change We classified the former land use targeted by the Tokyo Metropolitan Government for redevelopment projects and analyzed the renewal of building use and building coverage by development on a timely basis for each type. As a first result, seven types of conventional land use were obtained, and it became clear that they are changing to biased use. Secondly, at the initial stage of redevelopment, the pension rate of business facilities has been on an upward trend, but in recent years a wider open space has been added. On the other hand, it was found that the building peculiarity is planned to increase in the redevelopment of the residential area in recent years. 2) The transition of aims of district plan by administration We categorized the development goals that Tokyo Metropolitan Government gave to each district plan and analyzed their regional differences and transitions. As a result, four types of aim were obtained. While the "Cutting-edge development driving type" that forms a new city has decreased, it is clarified that "Habitability raising type" that improves the basic performance for living in the area tends to increase mainly in the three central wards of Tokyo. 3) Planner's discourses about concept of area update and interpretation of existing environments By analyzing the narratives on architectural specialty magazines that argued about the plans in the areas targeted for redevelopment, we revealed the transition of discussions that occurred with redevelopment. In the early stage of redevelopment, despite the immature debate, there was a tendency to tell the consciousness for new age and forming of new urban images. In recent years the discussion has matured, and development has been discussed from various viewpoints. However, the trend of new age consciousness and urban images tends to be decreasing, and it became clear that the explanation of the problems rooted in the community and the necessity of urban renewal are becoming the main story for urban update, instead of creating the new vision of Tokyo.