1. The Movement towards Sustainable Buildings in Japan
2005 WGBC Congress in San Francisco, June 1, 2005
The Movement towards Sustainable Buildings in Japan
Kazuo Iwamura
Professor, Musashi Institute of Technology
Vice-President, Japan Institute of Architects
Director of the National Conference Board of SB05Tokyo

2. Japan Sustainable Building Consortium (JSBC)
Chair: Prof. Shuzo Murakami
The JSBC was founded in 2001 and constituted of almost all the building- & construction-related organizations from Academia, Industry and Government
under the auspice of the Japanese Ministry of Land, Infrastructure and Transport.
Current major assignments are:
Development of CASBEE
and
Preparing and operation
of SB05Tokyo
Academia
Industry
Government

3. Concept & Dissemination
CASBEE
Comprehensive Assessment System for
Building Environmental Efficiency
Concept & Dissemination by
The Japan Sustainable Building Consortium
(JSBC)

4. Task Force for CASBEE Development
Japan Sustainable Building Consortium (JSBC)
Chair: Prof. Shuzo Murakami
Academia
This task force is constituted
of the following committees;
Steering Committee
Energy
Resource productivity
Indoor Air Quality
Local environment
Individual House
Urban & district
Heat Island
GBATool & Case study
Industry
Government

5. Japanese Government Policy Drive
about ＣＡＳＢＥＥ
1. Environmental Action Plan, Jun 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
2. Green Program of Government Buildings, Jul. 2004
Introduction of CASBEE to the Green Design Guidelines for
government buildings
3. Decision of Urban Renaissance Headquarters, Cabinet Secretariat, Dec. 2004
CASBEE for District/Region to be developed within two years
Eco-rating of urban renewal projects within five years

6. Introduction of CASBEE by Major Local Governments
1. City of Nagoya: April 2004
2. City of Osaka: October 2004
3. City of Yokohama: July 2005
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.
Many other major local governments are now preparing to introduce CASBEE.

7. 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
and
2. “L“ :Building Environmental Loadings,
according to
the “Hypothetical Boundary” of the project.

8. What is ‘Hypothetical Boundary’?
Assessment category “Q”
as positive impact
inside the boundary
Assessment category “L”
as negative impact
outside the boundary
Resource
Consumption,
Embodied CO2
Emission, etc.
Emission of
Air-pollutants,
Noise, Heat
etc.
Hypothetical Enclosed Space
(Neighboring building)
(Neighboring building)
Site Boundary
Soil, Water-pollutants etc.

9. From Eco-Efficiency To BEE (Building Environmental Efficiency)
Values of products or services
Environmental load unit
1. Eco-Efficiency =
2. Revised definition =
3. BEE in CASBEE =
Beneficial output
Input + non-beneficial output
Building environmental Quality
and performance
Building environmental Loadings

10. 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

11. 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

12. Assessment Areas of CASBEE
1. Energy efficiency
2. Resource efficiency
3. Local environment
4. Indoor environment
(ca. 80 sub-items in total)
Primary Areas
Q1: Indoor environment
Q2: Quality of Services
Q3: Outdoor environment on site
Numerator Areas
Re-categorized into
Q (Quality) and
L (Loadings)
to indicate
BEE =
L1: Energy
L2: Resources and materials
L3: Off-site environment
Denominator Areas
Hypothetical Enclosed Space for CASBEE
Assessment Areas of
Q & L
BEE Evaluation

13. 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

14. 2.5 Assessment Result Sheet-2 “Q(SQ)” & “LR(SLR)” Display

15. 2-5. “BEE Graphical Display”
100
(Very sustainable) S A B+ 60
BEE=2.0 B- B- Q 50
BEE=0.5 C
(Unsustainable) 30 50 L
100
Q = 25 × (SQ - 1), L = 25 × (5 - SLR)
SQ: Total score of Q categories, SLR: Total score of L categories

16. Labeling results of ca. 80 submitted projects according to CASBEE Nagoya50
100 Q ( u a l i t y ) A B + - C
Office
School
Retail shop
Restaurant
Hall
Hospital
Hotel
Apartment
Factory
L (Load)
Rank S:
excellent A:
very good
B+:
good
B-:
fairly poor C:
poor S
Submission mandatory for buildings with floor areas of more than 2000m2

17. 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)

18. CABEE Family Tools & Design Process
Main Users
Pre-design
Design
Post-design
Planning
stage
Design stage
Construction
Operation
Renewal
design stage
Tool-0:
CASBEE for Pre-design
Client
Planner
Designer
Issues only possible to be
assessed at
planning stage,
Including the site selection
Tool-1:
CASBEE for New Construction
Engineer
Constructor
Assessed by themselves
Issues to be
preliminary & final design stage
construction stage, including design amendments
Tool-2:
CASBEE for Existing Building
Assessed by Accredited
Experts
Assessment
& labeling
after one year
operation or more
Tool-3:
CASBEE for Renovation
Assessed by
themselves
at renewal stage

19. Manuals of CASBEE Tool-1: CASBEE for Tool-2: CASBEE for
New Construction
Tool-2: CASBEE for
Existing Building

20. 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)

21. Manual of CASBEE Tool-1TC an 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.

22. 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

23. We are looking forward to seeing you all at:
27-29 September 2005