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  • ___________________________________________________________________________

    2013/SCSC/WKSP1/015

    Promotion of Green Housing and Building in Japan - Standards, Voluntary Measures and Other

    Incentives

    Submitted by: Japan

    Workshop on Sharing Experiences in the Design and Implementation of Green

    Building Codes Lima, Peru

    5-7 March 2013

  • 2013/4/3

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    Promotion of Green housing and building in Japan -Standards, voluntary measures and other incentives-

    Dr. Takao Sawachi Director, Dept. of Environmental Engineering

    Building Research Institute of Japan March 2013

    On behalf of Ministry of Land, Infrastructure, Transport and Tourism

    Ministry of Land, Infrastructure, Transport and Tourism

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    運輸部門

    民生部門

    産業部門

    Trend of Energy Consumption and CO2 Emissions in Housing and Buildings

    Housing and buildings account for more than 30 percent of total energy consumption in Japan. With significant increase  in the last two decades compared to industrial and transportation sectors. Against the backdrop, measures to improve  energy efficiency have been called for. 

    CO2 emissions of the housing and buildings sector have also increased significantly than other sectors.

    【Trend of Final Energy Consumption】

    (FY)

    (PJ)

    Industry

    Housing and buildings

    Transportation

    50.3%

    26.5%

    23.2%

    43.9%

    33.2%

    22.9%

    1990‐2010 7% increase

    1990‐2010 35% increase

    1990‐2010 6% decrease

    Total of 3 sectors 1990‐2010

    8% increase

    【Trend of CO2 Emissions】

    31.9% 34.8%

    (FY)

    1

    Industrial sector (factory etc.) 482 million tons

    Transportation sector  (automobile, etc.)

    (U ni t:   m

    ill io n  t‐ CO

    2)

    Business and other sectors  (commerce/service/business  office etc.)

    Household sector

    Energy conversion sector (power generator etc.)

    Industrial process Waste (incineration, etc.)

    217 million tons

    164 million tons

    127 million tons

    68 million tons

    60 million tons 22 million tons

    422 million  tons

    232 million  tons 217 million  tons 172 million  tons

    81million tons

    41million tons

    27million tons

  • 2013/4/3

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    Main Causes of the Increase in Energy Consumption in Housing and Buildings

    Source:  FY2008 Energy Supply Demand Result (Resources and Energy Agency)

    Changes in lifestyle including increase in the number of households  and use of electric device are believed to have large impact on the  growth of energy consumption in the housing sector.  

    The main reason for the growth in energy consumption in buildings  is believed to be changes in usage including the increase in floor  space and period of use (business hours).

    BuildingsHousing

    Trend of Energy Consumption related to Buildings  and Floor Space

    1990 2005 Growth Rate

    Unit

    Department store 8.7 9.8 12.6% Business hours per day

    Convenience store 22.1 23.6 7% Business hours per day

    Supermarket Large 10.2 12.6 23.5% Business hours per day

    Medium- sized

    10.4 11.4 9.6% Business hours per day

    Office Self owned

    10.6 11 3.8% Hours of buildings used per day

    Rent 11.2 11.8 5.4% Hours of buildings used per day

    Trend of Period of Use (business hours) by Building Usage

    Trend of Energy Consumption in Housing Sector  and Increase in Households

    Source:  FY2010 Energy Supply Demand Result (Resources and Energy Agency)

    Color TV 2.0 (FY1990)→2.4(FY2009)

    Air conditioner 1.3 (FY1990)→2.6 (FY2009)

    Refrigerator 1.2 (FY1990)→1.3 (FY2003)

    Computer 0.1 (FY1990)→1.2(FY2009)

    Toilet seat with warm washer 0.0 (FY1990)→1.0(FY2009)

    DVD player 0.0 (FY1990)→1.2(Fy2009)

    Source:  Directory of energy and economic statistics (2011)

    Trend of Number of Device Owned per Household

    Date released by Association of Department Stores and Japan Chain Stores Association and report on building  energy consumption in Kansai region・survey on energy consumption by large business  establishments  in Tokyo 2

    Energy consumption Number of household Energy consumption/number of  household

    Energy consumption Floor space Energy consumption/floor space

    Comparison of Energy Consumption per Household in the World

    Energy consumption for heating is much smaller in Japan than European and north American countries where the ratio is  very high, whereas energy consumption for water heating and lighting and home appliances in energy consumption is higher  in Japan.  Climate and lifestyle differ greatly by country or region and, as a result, the structure of energy consumption differs. Thus,  energy saving measures that suit their own country or region are needed. 

    For example, when compared with Germany, •energy consumption for heating is one-fourth, •energy consumption for heating water and lighting and home appliances is 50 percent to 100 percent greater.

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    0 20 40 60 80 100 120

    Japan (2008)

    Germany (2007)

    France (2007)

    UK (2007)

    US (2005)

    Heating Water  heating Cooking

    Lighting/home appliances/ Others

    Cooling

    Energy Consumption per Household (GJ/household, year)

    Naha (southernmost region)

    Thick insulation Long eaves to keep the sun out

    Asahikawa   (northern most region)

    Average Monthly Temperature in Japan and Germany

    3

    Source:  Weatherbase

    Tokyo  Asahikawa  Aomori  Naha

    Berlin  Hamburg  Munich 

    Jan.  Feb.  March  Apr.  May  June  July  Aug,  Sep. Oct.  Nov.  Dec. 

    * Source:  Jyukankyo Research Institute Inc. (compiled based on statistical data of each country  Sep.  2010

    * Note:   Figures in parentheses are years of latest data of each county. Cooking of the US is included in lighting, home appliances and others. Households of two or more people excluding one‐person households in case of Japan. Cooking of Japan is 

    for gas and LPG excluding heating and water heating, excluding power for cooking. Data of European countries does not include cooling.     

    Lighting/ home appliances

  • 2013/4/3

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    Category 1970 ~ 1980 ~ 1990 ~ 2000 ~ 2010 ~

    • 2009 ~

  • 2013/4/3

    4

    M ea su re s r el at ed

     to  h ou

    se s a

    nd  b ui ld in gs  in  o rd er  to

     re al ize

     lo w ‐c ar bo

    n  so ci et y

    【Assure Minimum Energy Efficiency Performance of Houses and Buildings】

    Roadmap of Future Building Energy Efficiency Policies

    FY2030FY2020FY2012 FY2017 FY2019FY2013 FY2014 FY2015 FY2016 FY2018

    【Promote Construction of Houses and Buildings with Higher Energy Efficiency Performance】 ・Labeling and information provision of energy efficiency (Merits caused by improvement of thermal environment, etc.) ・Promote construction of zero‐energy homes ・Promote construction of houses and buildings which utilize advanced CO2 emission reduction technologies ・Certify and promote houses and buildings with high energy efficiency performance  (Certification system of low‐carbon buildings), etc.

    Revise Housing Performance  Indication Standard, etc. Evaluation by primary energy  consumption index

    Mandatory reporting (No less than 2,000㎡)

    Mandatory reporting (300~2,000㎡)

    Mandatory compliance (No less than 2,000㎡)

    Mandatory Compliance (300~2,000㎡)

    Mandatory Compliance (Less than 300㎡)

    Obligation to make efforts (Less than 300㎡)

    Revise Energy  Efficiency  Standards Evaluation by  primary energy  consumption  index Small

    Medium

    Large

    【Improve Energy Efficiency of Existing Houses and Buildings】 ・Support energy efficiency renovations of existing houses and buildings ・Promote improvement of building materials and equipments by top‐runner standards ・C