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Kuzuki R.,Tokyo Gas Co. | Murakami S.,Institute for Building Environment and Energy Conservation | Ikaga T.,Keio University | Yamada K.,Tokyo Gas Co. | And 3 more authors.
Journal of Environmental Engineering (Japan) | Year: 2015

Community-level decentralized and self-reliant energy network is expected to contribute to create a sustainable community as well as its self-vitalization and energy resiliency. But implementation of this system requires consensus among variety of stakeholders and long payback period, which are major hurdles. This study proposes the following concept and methods; (1)PPP business scheme consisting of two types of actors; "community-level energy network infrastructure operating company" and "on-site energy production and service providers". (2)Proper re-allocation of cost and co-benefits among stakeholders by taking advantage of opportunities of adjusting tariffs, taxes, subsidies for the purpose of equalizing each stakeholder's B/C. Source


Kawakubo S.,Hosei University | Ikaga T.,Keio University | Murakami S.,Institute for Building Environment and Energy Conservation
Journal of Environmental Engineering (Japan) | Year: 2013

CASBEE-City, a comprehensive environmental assessment tool for municipalities (cities, towns, and villages), was developed to support citizens, local governments, and other stakeholders in understanding their local conditions. In this study, the aim was to examine the tools practical effectiveness through a nationwide questionnaire survey. The statistical relationship was analyzed between the subjective assessment results (citizens' satisfaction with local conditions) and the objective CASBEE-City assessment results, which are based on public statistical information. A clear relationship was found between the subjective and objective assessment results for municipalities, thus verifying the tools effectiveness. Source


Kawakubo S.,Hosei University | Ikaga T.,Keio University | Murakami S.,Institute for Building Environment and Energy Conservation | Hoshi T.,Tokyo Metroplitan University | Ando S.,Feio University
Journal of Environmental Engineering (Japan) | Year: 2014

Previous studies have revealed relationships between specific residential environmental factors and residents' health status. However, no previous study has considered the comprehensive health risk due to overall residential environment. Therefore, a large-scale nationwide questionnaire survey was conducted using CASBEE Health Checklist to examine the residential environment of detached houses and residents' health status. Results show that overall residential environment was likely an important determinant of health and was associated with disease prevalence among residents. Source


Kawakubs S.,Hosei University | Ikaga T.,Keio University | Murakami S.,Institute for Building Environment and Energy Conservation
AIJ Journal of Technology and Design | Year: 2013

Environmental performance assessment tool for municipalities (CASBEE-City) has been developed and upgraded since 2008. The tool automatically queries the database and extracts the necessary data for conducting the nationwide municipality assessment. The tool also incorporates GIS functionality and enables tool users to understand the conditions, strengths, and weaknesses of their municipalities in comparison with other municipalities in Japan by visualizing the assessment results on easy-to-understand maps. Source


Kawakubo S.,Hosei University | Ikaga T.,Keio University | Murakami S.,Institute for Building Environment and Energy Conservation
AIJ Journal of Technology and Design | Year: 2013

A time-series assessment of urban environment was carried out by using "CASBEE-City" tool in Kobe city to visualize the disaster recovery process. As a result of the assessment, it was revealed that the score for quality of Kobe city calculated by the tool got drastically worse soon after the Great Hanshin-Awaji Earthquake in 1995. However, the score for quality of Kobe city has gradually recovered after the earthquake and has improved to the current position along with the progress of the reconstruction. Source

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