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Ito M.,Sumitomo Mitsui Trust Bank Ltd | Murakami S.,Institute for Building Environment and Energy Conservation | Ikaga T.,Keio University | Hayashi T.,Chiba University | And 2 more authors.
AIJ Journal of Technology and Design | Year: 2016

We conducted a survey on economic impact of CASBEE score and intellectual productivity. We found some effective correlation between CASBEE scores and rents. For example, rents of CASBEE building have possibility to be 3.6% higher rents compared to those of non-CASBEE buildings. We also observed correlation between intellectual productivity score and rents. We will disseminate such findings to market players in Japan in order to promote green properties.


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.


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.


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.


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.


Takase K.,University of Tokyo | Nakagawa A.,University of Tokyo | Kuwasawa Y.,Japan Building Research Institute | Mae M.,University of Tokyo | Murakami S.,Institute for Building Environment and Energy Conservation
AIJ Journal of Technology and Design | Year: 2013

Recently, not only running CO2 consumption but also initial CO2 reduction has been important. In Japan, LCCM (Life cycle carbon minus) is a keyword of sustainable buildings. In LCCM buildings, many efforts to reduce CO2 (such as high thermal insulation, high efficient equipment, and so on) are adopted and Photovoltaic system can return more amount of CO2 than CO2 which is consumed in buildings. According to such principal, LCCM demonstration house were built in 2011. We have checking the performance of this house by experimental residence.


Mizuishi T.,Nomura Research Institute | Mizuishi T.,Keio University | Ikaga T.,Keio University | Murakami S.,Institute for Building Environment and Energy Conservation | Tanabe S.-I.,Waseda University
AIJ Journal of Technology and Design | Year: 2013

Residential and commercial building sector accounts for more than 30% of final energy consumption in Japan and an increase from the past is remarkable. In order to realize a low-carbon society, further strengthening of energy saving measures is essential. Japanese government is considering a mandatory policy scheme which forces all residential and non-residential buildings to meet the energy efficiency standard by 2020. This research aims to marshal trends on regulations for energy efficiency of residential and non-residential buildings within countries which implements advanced measures, and to obtain referential knowledge for Japan's energy efficiency measures.


Muro K.,Ashikaga Institute of Technology | Kuwasawa Y.,Japan Building Research Institute | Aoki M.,Institute for Building Environment and Energy Conservation | Imai S.,Japan Building Research Institute
AIJ Journal of Technology and Design | Year: 2013

The reduction of residential energy consumption is a very important issue. Housing plans with a combined living room and kitchen are becoming more common. It is impossible to disregard the influence of the heat of cooking on the indoor thermal environment and on the total cooling and heating load in the home. We conducted online questionnaire surveys to find out the actual conditions of cooking behavior and energy consumption. The results identified the main factors that influence cooking energy consumption and showed that differences in energy consumption varied depending on household characteristics.


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.


Kawakubo S.,Keio University | Kawakubo S.,Japan Society for the Promotion of Science | Ikaga T.,Keio University | Murakami S.,Institute for Building Environment and Energy Conservation | Asami Y.,University of Tokyo
Journal of Environmental Engineering (Japan) | Year: 2013

A comprehensive, nationwide assessment of whole municipalities in Japan was conducted using the Comprehensive Assessment System for Built Environment Efficiency (CASBEE) tool specifically designed for citylevelassessment (CASBEE-City).As with other tools in the CASBEE family, CASBEE-City is also based on the concept of environmental efficiencyand calculates the value for built environment efficiency (BEE). In this study, BEE is calculated by usingpublic statistical information and visually displayed on amap through a geographic information system(GIS)to understand the current situation of all municipalities in Japanunderthe same assessmentcriteria(same assessment items, thresholdsand rating functions).

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