Kazuo IwamuraProfessor, Musashi Institute of TechnologyVice-President, Japan Institute of Architects

Director of the National Conference Board of SB05Tokyo

The Movement towards Sustainable Buildingsin Japan

2005 WGBC Congress in San Francisco, June 1, 2005

Japan Sustainable Building Consortium (JSBC)

Chair: Prof. Shuzo Murakami

Academia

Industry

Government

The JSBC was founded in 2001 and constituted of almost all the building- & construction-related organizations from Academia, Industry and Governmentunder the auspice of the Japanese Ministry of Land, Infrastructure and Transport.

Current major assignments are:

Development of CASBEEandPreparing and operationof SB05Tokyo

Concept & Dissemination

byby

TheThe JJapanapan SSustainableustainable BBuildinguilding CConsortiumonsortium

((JSBCJSBC))

CASBEECASBEE

Comprehensive Assessment System for

Building Environmental Efficiency

Task Force for CASBEE DevelopmentJapan Sustainable Building Consortium (JSBC)

Chair: Prof. Shuzo Murakami

Academia

Industry

Government

This task force is constitutedof the following committees;

1. Steering Committee2. Energy3. Resource productivity4. Indoor Air Quality5. Local environment6. Individual House 7. Urban & district8. Heat Island9. GBATool & Case study

1. Environmental Action Plan, Jun. 2004 by Ministry of Land, Infrastructure & Transport

• Dissemination of CASBEE for New & Existing Construction• Establishment of CASBEE Accreditation Program• Promotion of CASBEE to be introduced by local governments

Japanese Government Policy Drive about ＣＡＳＢＥＥ

2. Green Program of Government Buildings, Jul. 2004• Introduction of CASBEE to the Green Design Guidelines for government buildings

• CASBEE for District/Region to be developed within two years• Eco-rating of urban renewal projects within five years

3. Decision of Urban Renaissance Headquarters, Cabinet Secretariat, Dec. 2004

Introduction of CASBEEby Major Local Governments

1. City of Nagoya: April 2004

2. City of Osaka: October 2004

3. City of Yokohama: July 2005

Many other major local governments are now preparing to introduce CASBEE.

It is mandatory for building permit applicants to submit the assessed data, part of which is to be disclosed on the website of local government.

Basic Idea of CASBEE

CASBEE is a comprehensive, but clear, simple & affordable system to assess the building sustainability through both

1. “Q” :Building Environmental Quality & Performance and2. “L“ :Building Environmental Loadings, according to

the “Hypothetical Boundary” of the project.

What is ‘Hypothetical Boundary’?

(Neighboring building) (Neighboring building)

Hypothetical Enclosed Space Site Boundary

Assessment category “L” as negative impact

outside the boundary

Assessment category “Q” as positive impact

inside the boundary

Emission of Air-pollutants,Noise, Heatetc.

ResourceConsumption,Embodied CO2

Emission, etc.

Soil, Water-pollutants etc.

1. Eco-Efficiency =

2. Revised definition =

3. BEE in CASBEE =

Values of products or services

Environmental load unit

Beneficial output

Input + non-beneficial output

Building environmental Quality and performance

Building environmental Loadings

From Eco-Efficiency To BEE (Building Environmental Efficiency)

Basic Idea of CASBEE (cont’d)

Assessment result is finally indicated in terms of

BEE = Q / L

BEE: Building Environmental Efficiency Q : Building Environmental Quality & Performance L : Building Environmental Loadings

1. Basic Idea of CASBEE (cont’d)

1-4. CASBEE has four primary assessment areas,such as;

1) Energy Efficiency 2) Resource Efficiency 3) Local Environment 4) Indoor Environment

to be re-categorized into

“Q-1~3” & “L-1~3” for BEE evaluation

Re-categorized into

Q (Quality) andL (Loadings)

to indicate

BEE =

Assessment Areas of CASBEE

Q1: Indoor environment

Q2: Quality of Services

Q3: Outdoor environment on site

Numerator Areas

L1: Energy

L2: Resources and materials

L3: Off-site environment

Denominator Areas

BEEBEE Evaluation

Assessment Areas of

QQ & LL

Hypothetical Enclosed Space for CASBEECASBEE

1. Energy efficiency

2. Resource efficiency

3. Local environment

4. Indoor environment

(ca. 80 sub-items in total)

Primary Areas

2.5 Entire Assessment Result Sheet-1

Project Outline

Rader Chart of SQ & SLR

Bar Charts of SQ-1~3

Bar Charts of SLR-1~3

Graphical Display of

BEE = Q / L

Optional Assessment Items

2.5 Assessment Result Sheet-2““QQ((SSQQ))”” & ““LRLR((SSLRLR))”” Display

(2) Results of Comprehensive Assessment for Building Environmental Efficiency *1*2

(2)-1 Results by Category

Radar Chart Q. Building Environmental Quality & Performance *3

Score; SQ= 4.0 * SQ = 0.50 ＊ SQ1 + 0.35 ＊ SQ2 + 0.15 ＊ SQ3

Q-1 Indoor Environment Q-2 Quality of Service Q-3 Outdoor Environment on Site

Score; SQ1= 4.2 SQ2= 3.6 SQ3= 4.6

LR. Reduction of Building Environmental Loadings *3

Score; SLR= 3.6 * SLR = 0.50 ＊ SLR1 + 0.30 ＊ SLR2 + 0.20 ＊ SLR3

LR-1 Energy LR-2 Resources and Materials LR-3 Off-site Environment

Score; SLR1= 3.8 SLR2= 2.8 SLR3= 4.1

5.04.05.05.03.0 3.0

1

2

3

4

5

Air Pollution Noise & Wind Lighting Heat Island Load on Offensive Damage Damage Effect Local Odors Infrastructure

2.73.6

1

2

3

4

55.02.5 4.03.8

1

2

3

4

5

3.0 3.5 4.2

1

2

3

4

53.4 4.5 4.4 4.2

1

2

3

4

53.05.05.0

1

2

3

4

5

Eco- Tow n & Culture &system Land- Regional scape Character

Service Durability Flexibility ability　 & Adaptability

Water Eco- Resource materials

Building 　 Natural Eff iciency EfficientThermal Energy in building Operation Load system

Noise & Thermal Lighting & AirAcoustics Comfort Illumination Quality

0

1

2

3

4

5Q-2

Q-3

LR-3

LR-2

LR-1

Q-1

weight=0.35

weight=0.15weight=0.50

weight=0.50

weight=0.30

weight=0.20

2-5. “BEE“BEE Graphical Display”Graphical Display”

Q = 25 × (SQ - 1), L = 25 × (5 - SLR) SQ: Total score of Q categories, SLR: Total score of L categories

50

100

0 50 100

CC

B+B+AASS

BEE=1.5BEE=3.0

BEE=0.5

L

QB-B-

BEE=1.0

(Very sustainable)(Very sustainable)

(Unsustainable)

30

60 BEE=2.0 B-B-

Labeling results of ca. 80 submitted projects according to CASBEE Nagoya

Submission mandatory for buildings with floor areas of more than 2000m2

0

50

100

0 50 100

0

50

100

0 50 100

Q (

Qu

ali

ty)

A B+

B-

C

Office

School

Retail shopRestaurant

Hall

Hospital

HotelApartment

Factory

L (Load)

Rank S:excellent

A:very good

B+:good

B-:fairly poor

C:poor

S

CASBEE Family

1-5. CASBEE Family comprises four basic Tools, to be customized according to the design process, including;

1) Tool-0: Pre-design Assessment Tool (to be elaborated) 2) Tool-1: for New Construction (completed in 2002) 3) Tool-2: for Existing Building (completed in 2004) 4) Tool-3: for Renovation (completed in 2005)

CABEE Family Tools & Design Process

Tools Main Users

Pre-design Design Post-design

Planningstage

Design stage Constructionstage

Operationstage

Renewaldesign stage

Tool-0:CASBEE for Pre-design

ClientPlannerDesigner

Issues only possible to beassessed atplanning stage,Including the site selection

Tool-1:CASBEE for New Construction

ClientDesignerEngineerConstructor

Assessed by themselves

Issues to beassessed at preliminary & final design stage

Issues to beassessed at construction stage, including design amendments

Tool-2:CASBEE for Existing Building

ClientDesignerEngineerConstructor

Assessed by AccreditedExperts

Assessment& labelingafter one yearoperation or more

Tool-3:CASBEE for Renovation

ClientDesignerEngineerAssessed bythemselves

Assessmentat renewal stage

Manuals of CASBEE

Tool-1: CASBEE for New Construction

Tool-2: CASBEE for Existing Building

Extension of CASBEE Family

includes:

1) CASBEE-1TC: Temporary Construction (completed in 2004)

2) CASBEE-HI: Heat Island (completed in 2005)

3) CASBEE-DR: District & Region (to be completed in 2005)

4) CASBEE-DH: Detached House (to be completed in 2006)

Manual of CASBEE Tool-1TCan extension of CASBEE family

Tool-1TC: CASBEE for Temporary Construction (issued in 2004)

The 2005 World Exposition, Aichi, Japan was assessed for the first time.

Certification & Accreditation

1. CASBEE Assessment Certification: provided by IBEC

2. CASBEE Assessor Accreditation: associated with the education system also provided by IBEC

IBEC: Institute for Built Environment & Energy Conservation

http://www.sb05.com27-29 September 2005

We are looking forward to seeing you all at: