CASBEE (Comprehensive Assessment System for Building Environmental Efficiency) is a certification system developed in Japan to assess the environmental performance of buildings, focusing on their sustainability and impact on the environment. It includes various assessment tools tailored to different building types and stages of construction, categorized into a rating system from S (excellent) to C (poor). The document also compares CASBEE with LEED, highlighting its limited application in Japan and the subjectivity of its evaluation compared to LEED's internationally recognized standards.

1. CASBEE
CERTIFICATION
ENVIRONMENTAL DESIGN
Ann Mary Athulya Geethika Nazla Pournima Shabareesh

2. Introduction
• CASBEE(Comprehensive Assessment System for Building
Environmental Efficiency) , a system created in 2001
• Research and development of CASBEE is a joint
industrial/government/academic project established under the support of
the Japanese ministry of Land, Infrastructure, Transport and Tourism.
• The system comprehensively assesses the quality of a building based on its
environmental awareness in using building materials and equipment that
have little environmental impact, while also taking into account other
criteria such as the level of comfort of an interior or the views

3. The Beginning
• There has been a growing movement towards sustainable construction
since the second half of the 1980s, leading to the development of various
methods for evaluating the environmental performance of buildings.

4. The Beginning
CASBEE was developed according to the following policies:
1) The system should be structured to award high assessments to superior
buildings, thereby enhancing incentives to designers and others.
2) The assessment system should be as simple as possible.
3) The system should be applicable to buildings in a wide range of building
types.
4) The system should take into consideration issues and problems peculiar to
Japan and Asia.

5. Building Lifecycle and Four
Assessment Tools

6. Assessment tools
Corresponding to the building lifecycle, CASBEE is composed of four
assessment tools,
CASBEE for Pre-design,
CASBEE for New Construction,
CASBEE for Existing Building
CASBEE for Renovation,
and to serve at each stage of the design process.
CASBEE Family is the collective name for these four basic tools and the
tools for specific purposes.
Each tool is intended for the specific purpose and target users, and is
designed to accommodate a wide range of building types (offices, schools,
apartments, etc.).

7. CASBEE for Specific Purposes
Application Name
For Detached Houses
CASBEE for Detached Houses
(for New Construction, for Existing Building)
For Temporary Construction CASBEE for Temporary Construction
Brief versions
CASBEE for New Construction (Brief Version), for Existing
Buildings (Brief version), for Renovation (Brief version)
CASBEE for Urban Development (Brief version)
Local government versions CASBEE-Nagoya, CASBEE-Osaka, CASBEE-Yokohama etc.
For Heat Island effect CASBEE for Heat Island
For Urban Development CASBEE for Urban Development
For Cities CASBEE for Cities
For Market Promotion CASBEE for Market Promotion

8. Assessment system
. A building is rated based on a five-class assessment system :
• S (excellent);
• A (extremely good);
• B+ (good);
• B- (rather poor);
• C (poor).
A building rated A or above is deemed to be excellent and sustainable (an
environmentally friendly building).

9. Assessment Method
Two Categories of
Assessment: Q and L
• two spaces, internal and
external
• Thus we have put
forward CASBEE in which
the "negative aspects of
environmental impact
which go beyond the
hypothetical enclosed
space to the outside (the
public property)" and
"improving living amenity
for the building users"
are considered side by
side.
Division of the assessment categories for
Q: Built Environment Quality
L: Built Environment Load based on the
hypothetical boundary

10. Target Fields and Its Rearrangement
CASBEE covers the following four assessment fields:
(1) Energy efficiency
(2) Resource efficiency
(3) Local environment
(4) Indoor environment.
The assessment categories were classified as
BEE numerator Q (built environment quality)
BEE denominator L (built environment load).

11. Target Fields and Its Rearrangement
Q is further divided into three
items for assessment:
• Q1 Indoor environment
• Q2 Quality of services
• Q3 Outdoor environment on site.
Similarly, L is divided into
• L1 Energy
• L2 Resources & Materials
• L3 Off-site Environment.

12. Environmental Labeling Using
Built Environment Efficiency (BEE)
BEE, using Q and L as the two assessment categories, is the core concept of
CASBEE.
Building Environmental Efficiency (BEE) =
Q (Building Environmental Quality and Performance)
L (Building Environmental Loadings)
• The building types targeted for assessment are divided into non-residential
and residential categories with specified subtypes under each category.
• The use of BEE has enabled simpler and clearer presentation of building
environmental performance assessment results.

13. BEE Representation
• BEE values are represented on the graph by plotting L on the x axis and Q
on the y axis.
• The BEE value assessment result is expressed as the gradient of the
straight line passing through the origin (0,0).
• The higher the Q value and the lower the L value, the steeper the gradient
and the more sustainable the building is.
• possible to graphically
present the results of
built environment
assessments using areas
bounded by these
gradients.

14. From Eco-efficiency to Built
Environment Efficiency (BEE)
• Eco-Efficiency - "Value of products and services per unit environmental
load.”
• Efficiency - in terms of input and output quantities
• so a new model - expanded definition of Eco-Efficiency - as "(beneficial
output) / (input + non-beneficial output)."
• This new model of
environment efficiency
can be extended to
define Built
Environment Efficiency
(BEE), which CASBEE
uses as its assessment
indicator.

15. CASESTUDY
Yokohama building

16. Yokohama Dia Building
Class S-CASBEE
• the highest level in an assessment system for evaluating building environmental
efficiency (CASBEE Yokohama)
• first Mitsubishi Logistics building to be rated as "Class S.“
• In this assessment system, Yokohama City focuses on four main areas:
global warming measures,
heat island measures,
longevity measures
consideration to the city landscape.

17. Initiatives To Preserve The
Environment
Global warming measures
• The exterior wall facing Yokohama
Station boasts Japan's largest
building material-integrated
photovoltaic panels.
• The building's heat load is reduced
through the application of natural
energy as well as auto-control
blinds that use a solar homing
sensor and lighting controlled by
daylight sensors.
• Photovoltaic panel

18. Solar power system integrated with building materials
• Solar panels are installed on the west side of the building
• with the cell density designed at 50% to ensure the view while shielding
sunrays
• Behind the panels, Fine Floors catwalks and louvers are installed to admit
air and treat the exhaust air

20. Solar tracking system with
automatic control blinds
• The automatic solar tracking
sensors detect the presence of
sunrays and adjust the angles of
the blinds’ slats to prevent direct
sunlight from entering the
building’s interior.
• When there are no direct rays, the
system opens the slats to provide
better view while admitting
maximum daylight indoors,
achieving a reduction in power
consumptions by illumination.

21. Initiatives To Preserve The
Environment
Exterior of the building
Heat island measures
• lowering the effect of heat with rooftop
gardening
• environmental impacts are also reduced by
using outdoor air to cool the building when
external air temperature is lower than
room temperature during the winter and
inter-season periods.

22. Initiatives To Preserve The
Environment
Longevity measures
• Building sway is counterbalanced by vibrating weights with a
computer-controlled driving mechanism.
• In addition, a hybrid vibration damping mechanism that combines
active mass damper (AMD), to reduce vibration caused by wind,
and vibration damping equipment (vibration damping brace,
vibration damping wall) is used to increase the building's durability

23. Initiatives To Preserve The
Environment
City landscape considerations
• Improvements to the public arcade that
connects Yokohama Station and the Port
Side area have contributed greatly to
the development of a pedestrian
walkway network. A pocket park was
also added to provide a bit of space for
relaxation.
• Walkway-like open spaces and pocket
parks are provided on the ground level in
the external area
• Some of the third floor is designed for
pedestrian network in the district

24. CASESTUDY
TEDA MSD H2 Low
Carbon Building ,
Tianjin, China

25. TEDA
Class S-CASBEE
• First international CASBEE certified building
• Located at newly developed TEDA Modern Service District (MSD)
• Densely populated with service industry such as financial and IT companies
• the TEDA MSD H2 Low Carbon Building is demonstrating environmental
sustainable urban development.
features the national top level environmental
• photovoltaic generation,
• solar-heat hot water supply system
• geothermal heat pump system
• high-performance and low carbon
technologies;
• natural lighting,
• double-skinned facade, .

26. TEDA
• Implementing management
of building energy
performance with using BAS
(Building Automatic control
System) and BEMS (Building
Energy Management System -
top level energy-saving.
• As a comprehensive green
action plan, the project utilizes
eco-material and water
conservation with reusing
water supply system of gray
water and designs landscape
by planting trees and roof
garden.

27. CASBEE vs. LEED
CASBEE
• its practical application has been
limited in Japan.
• fundamentally an ‘architectural’
design tool,.
• most commonly utilized as a
‘checklist for sustainable design,
and an official CASBEE
certification is rarely pursued
• evaluation items in CASBEE are
subjective
LEED
• has been transformed into the
“world’s biggest green-building
brand name” due to the
successful marketing efforts by
USGBC.
• comprise or could be dissected
into various architectural and
engineering elements
• LEED certification is customarily
pursued by project owners for
marketing and promotional
purposes and LEED certified
buildings are growing every day
• clearly defined terms

28. • In Japan, a sustainable building is often defined as one that is
designed “to save energy and resources, recycle materials and
minimize the emission of toxic substances throughout its life cycle, to
harmonize with the local climate, traditions, culture and the
surrounding environment, and to be able to sustain and improve the
quality of human life while maintaining the capacity of the ecosystem
at the local and global levels”

29. Bibliography
• http://www.ibec.or.jp/CASBEE/documents/CASBEE_news_release(
E)140415.pdf
• http://www.ide.titech.ac.jp/~nabe/wp/casbee-vs-leed-how-is-each-embraced-
by-its-building-community/
• http://www.ibec.or.jp/CASBEE/english/backgroundE.htm

30. THANK YOU