Published papers

国土交通省の支援の下に、筆者らが研究・開発してきた建築物総合環境性能評価システム（CASBEE）のうち、改修建物を評価する手法を述べた。

国土交通省の支援の下に、筆者らが研究・開発してきた建築物総合環境性能評価システム（CASBEE）のうち、名古屋市、大阪市、横浜市などの自治体における制度導入の考え方と導入例を述べた。

住宅のエネルギー源別・用途別のエネルギー消費量とCO2排出量を都道府県別に1990年から2020年まで推計するシミュレーション手法の開発概要と自然体ケース、温暖化対策徹底実行ケースなどの検討結果を報告

東南アジア等人口増加が続く、高温多湿気候地域での環境負荷削減対策として、多孔質の集合住宅モデルを計画し、自然換気量増加と冷房負荷削減効果を検討した。日本学術振興会未来開拓学術研究プロジェクトの成果の一部。

産業連関表、その他の統計資料を基に事務所ビルの空調、衛生、電気、昇降機設備のライフサイクル環境負荷原単位データベースを作成した。日本建築学会LCA指針、国土交通省グリーン庁舎計画指針をはじめとして広く利用されている。

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.

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.

In the past two decades, CO2 emissions in Taiwan have sharply increased, but models for forecasting the future trend are still insufficient. In this study, based on the energy consumption of residential sector from 1990 to 2010, CO2 emissions were estimated up to 2050 using the macro simulation method. The model presents the final energy consumption and CO2 emissions by category of fuels and final usages. Several scenarios were applied to examine the possibility of achieving the goal set by the government; the most effective result shows 27% reduction by 2020 and 64% reduction of CO2 emissions by 2050.

It takes many years to recover the initial investment cost for installing housing insulation through savings from energy reduction (Energy Benefit: EB), since construction cost is very high in Japan. This long payback time is the major barrier to the promotion of well-insulated houses. However, it has been found that if Non-Energy Benefits (NEB) of well insulated houses, such as improvement in personal health, reduction of medical expenses and decline in absences from work are all taken into account, the time required to recover the initial investment cost would change from 29 to 16 years. Therefore recognition of NEB is expected to encourage residents to invest in residential thermal insulation. NEB of well-insulated houses is thus evaluated regarding human health in this study.

民生家庭部門の温暖化対策推進が求められていることを背景として、内装を極力破壊しない簡易改修手法として、外壁内中空層への断熱材注入手法の施工性、断熱性向上効果を実験によって検証した。さらに戸建住宅の断熱改修の温室効果ガス削減効果をLCA手法によって示した

Cities must improve their quality without an increase, or ideally with a decrease, in the amount of environmental load to become more sustainable. In order to monitor city's progress towards sustainable development goals, a comprehensive Assessment System for Built Environment Efficiency (CASBEE) tool, named CASBEE-City has been developed. All cities in Japan are assessed from the following two aspects: environmental load (L) on the external environment and quality (Q), which represents the citizens' quality of life inside the city. Built environment efficiency (BEE = Q/L) is then calculated for the comprehensive assessment of each city. A high BEE value indicates that the city has excellent environmental efficiency. The assessment results are visually displayed on the map by using a geographic information system so that citizens, local government officers, and all other stakeholders can easily understand the actual status of their city in comparison with other cities in the country. This assessment and the visualization of the results are expected to support the realization of future sustainable cities.

The effect on humans of a 6-hour long exposure to cyclic fluctuating air temperature was examined. The tested fluctuating pattern consisted of a gradual sweep-up +2.0◦C over 40 minutes and a rather abrupt sweep-down –2.0◦C over 20 minutes, within the temperature ranges of 26–28◦C and 27–29◦C. The experiment on cyclic fluctuating air temperature demonstrates that the thermal dissatisfaction rate for cyclic fluctuating air temperature control between 26◦C–28◦C is lower than that for constant air temperature control at 26◦C, while consuming less energy. Moreover, occupant stress levels measured by salivary alpha-amylase, and subjective fatigue levels under cyclic fluctuating air temperature show that similar or even lower distinct results can be achieved with fluctuating air temperature control compared with constant air temperature control.

In this paper, we present a micro-model designed to assess the effectiveness of low-carbon policies in addressing the energy problems faced by the Chinese urban residential sector. This micro-model first evaluates CO2 emissions based on available information for the residential sector, including the number of households, floor area and domestic appliance ownership. Two efficiency scenarios are then combined to form the simulation model: Chinese government policies and the low carbon plans of OECD (Organisation for Economic Co-operation and Development) countries. The simulation model estimates future emissions growth and the CO2 reduction potential of two efficiency scenarios. The results indicate that when government policies align with the efforts of residents, there is opportunity to reduce CO2 emissions in Chinese residential buildings for a relatively low price. In the frozen technology scenario, data shows that in all 31 province-level divisions, CO2 emission growth will see a 10-fold increase over the 2000 level. However, when compared with the frozen technology scenario, the reduction scenario shows reductions of 20% (warm areas) to 40% (cold areas). In the abatement scenario the reduction rates could be brought up to 50%. The model's outputs can be used to support decision-making when setting appropriate CO2 emission reduction goals. © 2013 Copyright Taylor and Francis Group, LLC.

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 city level assessment (CASBEE-City). As with other tools in the CASBEE family, CASBEE-City is also based on the concept of environmental efficiency and calculates the value for built environment efficiency (BEE). In this study, BEE is calculated by using public statistical information and visually displayed on a map through a geographic information system (GIS) to understand the current situation of all municipalities in Japan under the same assessment criteria (same assessment items, thresholds and rating functions).

青森県が温暖化対策の一環として、県有施設（庁舎、学校）における環境負荷低減手法の定量効果算定ツールの内容を論述した。

筆者らが開発した日本建築学会LCA指針準拠ツールに、資源消費量、廃棄物発生量、リサイクル量、最終処分量などの評価機能を追加したツールを用い集合住宅の資源有効利用と建設廃棄物削減について述べた。

This study aimed to clarify the impact of indoor thermal environment on sleep quality. Follow-up investigations on sleep quality (sleep efficiency, amount of deep sleep, sleep latency, and number of nighttime awakenings) and indoor temperature were conducted in winter (2014–2016) before and after moving to houses with high thermal insulation performance. Multiple linear regression analysis showed that sleep efficiency increased by 0.73% per 1 °C increase in indoor temperature during sleep. Increased indoor temperature also improved the number of nighttime awakenings.

This study aimed to demonstrate antihypertensive effects by moving to high thermal insulation performance houses. Field surveys on home blood pressure and indoor temperature were conducted before and after moving in winter 2014 and 2015. Systolic blood pressure (SBP) decreased by 1.5 mmHg per 1 °C increase in indoor air temperature and standard deviation (SD) of SBP improved by 2.3 mmHg per 1 °C improvement in SD of indoor air temperature in a group over 125 mmHg. However, to raise indoor temperature, it is not satisfied only by moving to high thermal insulation performance houses but adequately heating a room.

1. This study has carried out a cost benefits analysis for each stakeholder in an attempt to develop low-carbon communities and cities by implementing regional cogeneration systems and leasing photovoltaic systems to commercial buildings. 2. As a result, the economic benefits for energy service provider acting as an investor have been proved when non-energy benefits (NEBs) are accounted. In addition, numerous benefits to stakeholders other than investor have been proved. Also, subsidies by public sector (National, Local Government) or tax incentive program will increase the economic efficiency for energy service provider (investor). 3. Since building owners and building users will gain NEBs such as of increase in real estate value, risk reduction (contribution of business and living continuity plan (BLCP), regulatory compliance etc) and maintenance cost reduction, possibility for redistribution of NEBs to the energy service provider (investor) in the form of service charge (rent, energy expense etc) have also been considered.