Journal of the City Planning Institute of Japan

The Challenges and Measures to Conserve Private Wooden Areas in Historical Districts

Considering Landscape Conservation and Fire Prevention

Masahiko Takamatsu, Takeyuki Okubo

2013 Volume 48 Issue 2 Pages 111-119
Published: October 25, 2013
Released on J-STAGE: October 25, 2013

DOIhttps://doi.org/10.11361/journalcpij.48.111

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In Japanese historical districts like old castle towns, there are clusters of temples and samurai residences formed through developing history. It must be effective if wooden areas in these clusters will be conserved to protect heritages for both of landscape conservation and fire prevention. The first research was practiced to understand whether these wooden areas had been lost or not in last 30 years. And following researches were analyzed how city officers evaluate their function in recent cases, and how city officers recognize the reasons that these wooden areas still survive and challenges to conserve them for future. Being based on the result of these researches, an institutional measure was proposed in order to conserve them for future.

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Study on the Designation of City Planning Area and Zoning Area based on 22nd Article Area of Building Standard Law

Tatsuya Mitsuda, Yuya Sato, Toshiya Matsukawa, Bumpei Nakade, Shu Higu ...

2013 Volume 48 Issue 2 Pages 120-128
Published: October 25, 2013
Released on J-STAGE: October 25, 2013

DOIhttps://doi.org/10.11361/journalcpij.48.120

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This study aims to search for the possibility of the designation of City Planning Area or zoning area for Article 22 areas of Building Standard Law designated for the area out of City Planning Area or the non-zoned area. Then, we select four municipalities as a detailed case study, and understand the condition of Article 22 area from the hearing investigation and the survey of existing circumstance. As a result, we clarify the followings. 1) There are population accumulation and urban land use around Article 22 area also outside the City Planning Area. 2) It is necessary to treat Article 22 area as an index with the formation of urban area, and to designate the City Planning Area. 3) It is necessary to designate zoning area immediately for Article 22 area at the non-zoned area. 4) The intention of the municipality is given to priority about the designation of the City Planning Area and the zoning area.

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A study on spatial visions from the viewpoint of planning process of Osaka Station Front Are's Redevelopment Project

Toru Masui, Shinichi Takaoka, Koichi Kana, Yasutomi Sakuma

2013 Volume 48 Issue 2 Pages 129-134
Published: October 25, 2013
Released on J-STAGE: October 25, 2013

DOIhttps://doi.org/10.11361/journalcpij.48.129

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The study aims to clarify the change of spatial visions in planning process of OSAKA STATION FRONT AREA'S REDEVELOPMENT PROJECT by OSAKA City, from 1961 to 1973. The project built 4 high-rise buildings, and changed the plans 4 times. The findings are as follows: 1) In the first plan, 'aesthetics of sameness' was important concept, but the rise of buildings had changed higher through the process of planning and construction. 2) Though no planed at first, Open spaces had appeared both inside and outside the buildings. 3) The clear separation of the approach of cars and human beings by floors had changed lost.

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Present Status and Problems of Decontamination Planning and Activities by Municipalities in Fukushima Prefecture

Records of the Early Stage after the Fukushima Daiichi Nuclear Disaster

Kota Kawasaki

2013 Volume 48 Issue 2 Pages 135-146
Published: October 25, 2013
Released on J-STAGE: October 25, 2013

DOIhttps://doi.org/10.11361/journalcpij.48.135

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This study discusses the present status and problems of decontamination planning and activities in 52 out of the 59 municipalities in Fukushima Prefecture, that is, all municipalities except the 7 whose entire administrative area has been designated as Special Decontamination Area, one and a half years into the Fukushima Daiichi Nuclear Disaster. This study concludes that (1) decontamination work based on plans are beginning to accelerate in many municipalities, (2) the progress of decontamination work varies depending on types of land use, (3) most municipalities have no prospects to secure enough temporary storage sites for contaminated soil and waste, (4) most municipalities recognize that the national government's prompt decisions about where and when to construct intermediate storage facilities and the securement of enough temporary storage sites are necessary to promote decontamination work, (5) the majority of municipalities regard efforts concerning decontamination work by the national government and Fukushima prefectural government as inadequate, and (6) the majority of municipalities believe that safe living environments will be recovered by decontamination work.

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A Hierarchical Bayesian Approach to Estimation of Rescinding Rate of Productive Open Space Zones

Case Study of Hino City, Tokyo

Sadatsugu Nishiura

2013 Volume 48 Issue 2 Pages 147-153
Published: October 25, 2013
Released on J-STAGE: October 25, 2013

DOIhttps://doi.org/10.11361/journalcpij.48.147

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Productive Open Space Zone(POSZ) in Japan has been applied to preserve agricultural areas within urbanization promotion area in different thoughts. These are less poverty tax for farmer, keeping urban green for environmental and ecological purposes, and evacuation area from urban disaster. However, POSZ has been criticized for not being able to accommodate planning perspective when there is a request for rescinding. I calculated rescinding rate of POSZ with the data of Hino City, Tokyo, applying a hierarchical Bayesian statistics with Markov Chain Monte Carlo simulation. The rates for each small district I estimated would be useful for further scientific policy making since my Bayesian calculation omits bias that the observed data would cause.

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Derivation of "Land Characteristic Index" and Comparative Analysis of Road Length in Japan, Great Britain, and United States

Hidetoshi Miura

2013 Volume 48 Issue 2 Pages 153-158
Published: October 25, 2013
Released on J-STAGE: October 25, 2013

DOIhttps://doi.org/10.11361/journalcpij.48.153

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In this paper, "Land Characteristic Index" theory, the theoretical function to calculate the rational road length of a region with population and area, is derived by a simple mathematical region model. The theory presents that road length in a region is proportional to the square root of the product of population and area of the region. The mathematical region model consists of a square and grid arterial road network. The "Land Characteristic Index" theory is used to compare the arterial road length of regions and countries. The length of arterial road in Japan is compared to Great Britain and United States based on the theory. The verification of the theoretical values and actual data shows that consideration of bias of population distribution and through traffic are important factors to improve the model to fit actual data.

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