Environmental Report

Environmental Accounting

ISO 6.5 Environment

Environmental conservation cost

Units: million yen

Classification Details of main initiatives FY 2015
Investment amount Cost
Total Ratio of previous year Civil engineering Building Offices Total Ratio of previous year
1.Cost in business areas   - 6,894 15,945 29 22,868 (932)
(1) Pollution prevention cost Cost of temporary works on sites to prevent air pollution, water contamination, noise, vibration, etc. - 328 31 16 375 0
(2) Global environmental conservation cost Cost of recovery of CFC and halon, green electricity procurement cost - 0 52 0 53 15
(3) Resource recycling cost Waste processing cost on site, resource recycling cost, asbestos and PCBs recovery and processing cost - 6,566 15,862 13 22,441 (947)
2. Upstream and downstream costs Personnel costs and management costs for environmentally friendly design and engineering - 0 0 1,774 1,774 49
3. Administration cost Personnel cost, education cost, and inspection cost for EMS, greening around construction sites, cooperation communities, etc. - 4 3 1,011 1,018 (48)
4. Research and development cost Personnel cost and management cost for environmental research and development (includes biodiversity conservation related cost of 31 mil. yen) 16 (9) 0 0 1,280 1,280 (123)
5. Social activity costs Donation to environmental NGOs, etc. - 0 0 8 8 (1)
6. Environmental remediation costs Soil survey and decontamination cost for real estate for sale by the Company, cost of land subsidence, and repair of roads and other neighboring repairs, etc. - 2 0 2 4 (8)
Total 16 (9) 6,900 15,948 4,105 26,953 (1,064)

Economic effect associated with environmental conservation measures

Units: million yen

Economic Effect Associated with Environmental Conservation Measures Amount
Economic Effect Associated with Environmental Conservation Measures (substantial effect) Earnings Recycling of waste produced by the main business activities 222
Cost reduction Reduction in office energy cost due to energy efficiency 38
Reduction in construction site energy cost 855
Reduction in waste processing cost associated with resource conservation and recycling 99
Economic Effect Associated with Environmental Conservation Measures (estimated effect) Reduction of environmental impact converted to monetary amount 71

Environmental research and development cost ratio

Environmental impact ratio
(only derived from Taisei Corporation)

Environmental efficiency

Taisei Corporation Material Flow

ISO 6.5 Environment
GRI EN1,EN3,EN8,EN15,EN16,EN17,EN19,EN20,EN21,EN22,EN23,EN25

Taisei Corporation material flow

INPUT Units FY 2011 FY 2012 FY 2013 FY 2014 FY 2015
Total energy use 109MJ 3.96 3.55 3.84 3.26 3.57
Construction Site (building) 109MJ 1.71 1.56 1.41 1.34 1.40
Construction Site
(civil engineering)
109MJ 2.13 1.64 2.16 1.67 1.93
Offices 109MJ 0.12 0.35 0.27 0.25 0.24
Total fossil fuel use 103KL 62 55 71 55 58
Diesel 103KL 61 53 70 54 57
Kerosene 103KL 1 0.9 0.8 0.7 0.6
Heavy oil 103KL 0.3 0.9 0.2 0.1 0.2
Total electricity 106kWh 161 143 110 115 134
Construction Site (building) 106kWh 50 58 37 40 33
Construction Site
(civil engineering)
106kWh 99 56 53 56 82
Offices 106kWh 12 29 20 19 18
City gas (offices) 103m3 85 150 140 103 91
Total quantity of the main construction materials
(following 6 items)
103t 6,742 6,676 7,702 10,472 7,638
Ready mixed concrete 103t 5,440 5,200 6,441 8,249 4,321
(gravel, crushed stone, etc.)
103t 461 870 519 1,095 2,411
Cement 103t 164 130 102 326 190
Steel 103t 647 440 606 765 690
Timber 103t 26 30 31 27 21
Asphalt 103t 4 6 4 10 2
(of which the green procurement quantity)* 103t 1,761 2,161 2,701 2,946 1,152
Total concrete formwork use 103m2 4,741 4,407 5,640 5,085 3,473
Tropical plywood formwork 103m2 3,094 3,543 3,712 3,219 2,514
Alternative formwork 103m2 1,647 864 1,928 1,866 959
Alternative formwork percentage % 34.7 19.6 34.2 36.7 0.3
Water (consumption) 103m3 3,063 1,663 5,231 1,383 1,970
OUTPUT Units FY 2011 FY 2012 FY 2013 FY 2014 FY 2015
Total CO2 emissions 103t-CO2 228 216 250 209 226
Construction Site (building) 103t-CO2 104 97 92 88 92
Construction Site
(civil engineering)
103t-CO2 119 103 143 108 122
Offices 103t-CO2 5 16 15 13 12
Total CO2 emissions 103t-CO2 228 216 250 209 226
Scope1 103t-CO2 134 118 163 124 128
Scope2 103t-CO2 67 73 65 67 76
Scope3 103t-CO2 26 25 22 18 22
NOX t 1,054 921 1,215 931 989
SOX t 158 143 182 139 148
Quantity of Chlorofluorocarbon and halon recovered t 5 3 12 7 11
Construction soil
(transported off site)
103m3 1,717 2,753 2,333 3,342 861
Construction waste 103t 1,633 2,236 2,695 2,355 2,284
Quantity recycled and given intermediate processing 103t 1,614 2,220 2,660 2,312 2,261
Quantity of direct final disposal 103t 19 17 35 43 22
(of which, asbestos quantity disposed) 103t 4 6 8 5 8
Water (discharged) 103m3 964 1,839 3,003

The quantity used as green procurement products out of the main construction materials

Third-party Assurance of the Environmental Data of Taisei Corporation

We have standardized and manualized the method of collecting and aggregating environmental data such as the quantity of energy consumed and the quantity of CO2 emissions for the seven major group companies participating in the Taisei Corporation Group Environmental Promotion Conference with an aim of utilizing in initiatives for reducing environmental impact and sharing information on progress. In FY2015, Taisei Corporation and the seven Main group companies received third-party assurance for the total values of their performance data. Taisei Rotec Corporation and TAISEI U-LEC CO., LTD. were inspected by auditors visiting their head offices and major factories.

Material flow for main group companies

INPUT Units FY 2011 FY 2012 FY 2013 FY 2014 FY 2015
Total energy use 109MJ 1.76 1.74 1.90 1.91 1.73
Sites (construction sites) 109MJ 0.30 0.28 0.32 0.42 0.40
Factories 109MJ 1.33 1.30 1.43 1.33 1.19
Offices 109MJ 0.15 0.16 0.16 0.16 0.14
Total fossil fuel use 103KL 29 30 33 35 30
Diesel 103KL 9 8 9 15 12
Kerosene 103KL 3 2 3 3 3
Heavy oil 103KL 17 17 19 16 14
Gasoline 103KL 1 3 2 2 2
Total electricity use 106kWh 44 45 48 46 44
Sites (construction sites) 106kWh 1 1 1 1 1
Factories 106kWh 35 35 38 36 35
Offices 106kWh 8 9 10 9 8
City gas 103m3 3,190 2,853 3,181 2,592 2,888
LPG t 150 133 255 92 58
Water (consumption) 103m3 100 105 138 142 137
OUTPUT Units FY 2011 FY 2012 FY 2013 FY 2014 FY 2015
Total CO2 emissions 103t-CO2 107 107 121 124 111
Sites (construction sites) 103t-CO2 20 18 22 29 27
Factories 103t-CO2 78 81 90 85 75
Offices 103t-CO2 8 8 10 10 8
NOx t 259 325 277
SOx t 153 148 128
Quantity of Chlorofluorocarbon and halon recovered t 2 1 2
Total industrial waste emissions 103t 437 278 397 321 391
Quantity recycled 103t 423 267 389 312 365
Final disposal quantity 103t 14 11 8 9 26
Water (quantity discharged) 103m3 138 142 137

CO2 emissions of Taisei Corporation Group (FY 2015)

Construction waste amount of Taisei Corporation Group (FY2015)

Environment-related Technologies and Initiatives

ISO 6.5 Environment

Technologies and Initiatives that are Useful for Solving Environmental Issues

Technologies and initiatives to reduce risks and solve issues concerning the environment are developed and adopted at various stages in the life cycle of the business activities of the Taisei Corporation Group, which contribute to reducing the impact on the global environment. Energy-saving technologies and products, for instance, help prevent global warming by reducing energy consumption and CO₂ emissions. This helps protect the natural environment (biodiversity) and stabilize the supply of resources (resource recycling), which results in safe air and water, a stable climate, and the protection of our living environment. The development of such environmentally friendly technologies helps not only part of areas of low carbon, resource recycling, and the natural environment (biodiversity), but affects all the areas connecting deeply with each other. Taisei Corporation plays an important role as a company carrying social responsibility involved in social capital formation.

Environment Related Technologies and Initiatives

Titles in blue are externally awarded technologies and initiatives

  Planning and Design Construction Operation, Renovation, Demolition Application of Research and Development Technology
Prevention of Global Warming
  • Low-carbon Building
    • Urban-type ZEB
    • T-ZEB simulator
    • HVAC optimizing tool
  • Energy-saving and ZEB technology
    • T-Zone Saver
    • T-Breeze Floor System
    • T-Personal Air Ⅲ
    • T-Soleil, T-Soleil 100
    • North Country Air Conditioning
    • T-Light Cube
    • Photovoltaic system for building
    • T-Radiant Slab
    • Site installing pile using geothermal conditioning
    • Organic EL Task Lighting
    • Original TAISEI LED lighting
    • Duct-capping air conditioning system
    • Radio control system
    • Natural air ventilation system (T-Fresh Air)
    • Ground Source Heat Pumps
    • T-Façade Air
    • Liquid Cooling Air-conditioning System
    • T-Green BEMS
    • Task and ambient system for lighting and air-conditioning
  • Smart community related technology
    • Smart thermal/electrical storage system
    • DC Powered Office
    • Application of renewal energy
    • Low-carbon city block simulator
    • Fuel Cell System of Hydrogen
    • Demand response technology*1
  • Miscellaneous
    • CO2 underground sequestration simulation
    • Electrification Floor
    • Wide area landscape evaluating system
    • BIM and VR/CIM*2 coupled functionality
    • Prediction system for strong wind stream among high building
    • Verification of Smart Wellness Office
    • Outside-air supply system of Data Center
    • T-Flexible Clean room, T-Smart Clean room
  • Promote CO2 Zero Action, Eco Model projects
  • Carbon Navios
  • Application of energy-saving construction methods
    • Continuous belt conveyor tunnel construction method
    • Upward shield construction method
    • Fiber-reinforced ferro concrete segments
    • Harmonica method
    • Paving using Visco-MixA
  • Improvement of transport methods
    • Modal shift (surplus soil, industrial waste)
    • Reduced transport distance
    • Education in fuel-economical driving
  • Reduce CO2 by shortening construction periods
    • Continuous long-distance boring by shield machine with double bits
    • The continuous cutting of the gravel ground by multi-layered of cemented carbide tip
  • Adopt energy-saving machines and equipment
    • Electric-powered backhoe, LED lighting, solar power
  • Use biodiesel fuel
  • Simple foundation method for a frame with solar photovoltaic generation panels(T-Root)
  • General renovation work
    • Extending building life, installing information telecommunications capability, conversion to barrier free
  • Energy-saving renovation workD
  • Energy management
    • T-Green BEMS
    • T-Green Monitor
    • T-Carbon Conductor
    • Demand response technology*1
  • ESCO business*6B
  • Recovery and destruction of fluorocarbons
  • Recovery of SF6
  • Use renewable energy
    • Mega-solar power generation system
    • Tidal current power generation system
    • Concentrated solar power generation system
    • Geothermal utilization system
  • Develop liquefied CO2 storage facilities
  • Light-modulating ceiling system
  • Heat-recovering solar battery louvers
  • T-Smart Focus
  • BIM and VR/CIM*2 coupled functionality
  • T-Siteview
  • Aquarium using artificial seawater
  • Mole navigator
  • Breeding water recycling system
  • Vegetable plant
  • Wind power generation
  • Methane hydrate gas leak monitoring
  • CO2 underground sequestration (CO2 underground sequestration related facilities, CO2 transportation)
  • Electric power stabilization by electric power storage evaluation system (NaS battery*7)
  • Distributed energy network technology
  • Mega-Solar power generation system using the top of final landfill site
  • T-BIM Cloud system
Efficient Use of Resources
  • Long-life design (develop materials, construction methods)
    • T-RESPO construction method
    • TASMO
    • T-Grid、T.G-WALL、T.T-WALL
    • TASS-floor (3D)
    • T-RESQ F
    • TASS unit
    • T-Feels
    • TAS-Fine
    • U.F.C
    • Automatic warehouse rack seismic vibration control system
    • Ultra high-strength concrete construction planning technology
  • Resource-saving
    • Eco-friendly concrete
    • Corrugated air duct
    • T-POP construction method
    • CFT construction method
    • TAS-Clean
  • Zero emission construction
    • Designated worksite with implementation of zero emissions priority
    • Recycling cutter bits of shield machines
    • E-DAM
    • Recycle wood building materials generated by construction
    • Construction method using reduced-slurry soil cement columns in rows
    • Efficient use of soil generated by construction
    • Use tree cuttings go mulch, compost, charcoal
    • Reuse of soil generated by constructionF
  • Resource-saving
    • Precasting ultra high-strength concrete
    • Green procurement
    • Fc 200N precast column application
    • Ultra high-strength concrete with 300 N compressive strength
    • Reuse of existing pilings during building reconstruction
    • LNG tank dual PC dike
    • nePreC
    • Wall PC Structure with Seismic isolation (PALLOUGE χ Premium)C
    • Manufacturing precast products with rapid-hardening concreteC
    • Manufacturing concrete segments with fine powder of blast-furnace slagC
    • Joint molding of PC formwork using recycled plastic boardC
  • Zero emission demolition
  • Conversion
  • Renovation
  • Life-extending repair
    • Earthquake resistance, base isolation, seismic vibration control
    • Embankment structure anti-seismic reinforcement method
    • Short stroke seismic isolated system for an urban area
    • Anti-seismic reinforcement by Post-Head-barF
    • Use of ground flex mole method (flexible boring) for anti-seismic reinforcement of tank conforming to old law
  • Pipe refreshing method
  • Measures against liquefaction of existing facilities with the groundwater level lowering method
  • Measures against liquefaction of existing facilities with the WinBLADE method
  • Efficient use of concrete debris
  • Health Monitoring System for Foundations
  • Post-Head-Anchor
  • TAISEI super concrete
  • T-POP construction method
  • Super green concrete
  • Reusing shield tunneling cutter bits
  • Reuse demolished concrete as aggregate
  • Use tree cuttings for charcoal, compost
  • Use dehydrated cake produced after chitosan flocculant treatment for planting base
  • Produce ethanol from rice straw
  • Business of improving and operating final disposal sites through PFI, DBO*8
  • Business of restoring final waste disposal sites
  • Biogas fermentation of domestic animal waste, garbage, and use for electric power generation
  • Methane fermentation without dilution by water
  • T-WOOD OA Floor
  • Construction waste cyclic collecting system for project sites
Conservation of Biodiversity
  • Ecological Planning
  • Landscape design
  • Eco-system conservation, Environmentally co-existing planning
  • Urban forest developing technology
  • Mitigation, biotope
  • Wetland environment impact assessment
  • Nature-friendly greening, green space ecology planning
  • Wetland environment restoration
  • Natural environment conservation and disaster mitigation design method using GIS*3
  • Water purification using high-density oxygen water
  • IKIMONO-Concierge*4 (Simplified biodiversity assessment tool)
  • T-Heats Turf
  • Rooftop greening, wall greening, rooftop vegetable gardenE
  • Friendly to raptors and other rare organisms
  • Bottom sediment purification method
  • Urban forest creation
  • Pre-Forest
  • Transport rare plants
  • Mitigation
  • Manufacturing PC products with demolding agents using soybean oilC
  • Relocation and preservation of historic building
  • Inherit and develop local culture
  • Conservation of cultural assets
  • Forest saver project
  • Forest restoration
  • Research on eco-system
  • Eco-system friendly environmental education
  • Eco-system survey following biotope construction
  • Biodegradable slope frame made of “Biohard“
  • Greening plan based on cluster analysis
  • Technology for spraying local wild grasses
  • Aquatope
  • Aquatic environment restoration
    • Restoration of tidal flats and Zostera beds
    • Restoration technology of coral reef
  • Placement and promotion of animal pathways on existing roads
Reduction of Environmental Risks
  • Environmental Assessment
  • T-Heats
  • TSounds, TSounds-Floor
  • TWinds
  • Low-carbon city block simulator
  • Closed system disposal site
  • Remediation of contaminated soil
  • Groundwater remediation
  • Healthful housing plans
  • Radiation decontamination
  • Energy Saving Diagnosis
  • Environmentally Friendly Construction
  • Temporary enclosure greening
  • Water retaining pavement technology with water supply functionalityA
    • Cool Road, Cera CoolA
  • Cool WayA
  • Underground water reservoir construction methodA
  • Guidance regarding MSDS*5
  • Technology for accelerating decontamination work
  • Large-diameter curved pipe roof method
  • Weeds ad vegetation volume reduction
  • Automatic noise and vibration monitoring system
  • UD-HOMET construction method
  • Application of photocatalytic air purifier in underground construction
  • ICT-based management technology for dam construction (4D-DIS)
  • Tunnel Blasting noise reduction system
  • Unmanned construction equipment system
  • Remediation of contaminated soil, in situ remediation
    • Water injection bio-sparging method
    • Biodegradation method
    • Naturally derived heavy metals treatment
    • Soil remediation methodF
  • Groundwater remediation
    • Permeable purifying barrier (Multi-barrier) methodF
  • Environmentally friendly demolition planning and method
    • TECOREP system
    • Method of dismantling smokestacks “TECOREP Stack"
    • Incinerator demolition system compliant laws
  • Low-noise, low-vibration work method using wire saw
  • Laser non-slip work method
  • Remediation of contaminated soil, in situ remediation
  • Asbestos countermeasures
    • Robot to remove spray-on asbestos inside elevator shafts
    • Asbestos removal in subways using specialized wagon
    • Asbestos leaking monitoring system
  • Proper storage of PCBs
  • Radiation decontamination
  • Local environment assessment system
  • Vibration analysis system
  • Forecasting floods from localized severe rainstorms
  • Sick house countermeasures
  • Indoor air pollution prevention
  • Robot to remove spray-on asbestos
  • On-site asbestos abatement detoxification system
  • Decontamination technology for radioactive cesium-enriched fly ash
  • Soil and groundwater remediation
  • Water purification system using photocatalytic air purifier
    • In situ remediation of soil contaminated with benzene/cyanogen activating microorganisms
    • Water purification system using photocatalytic air purifier
    • Microorganism-based purification of contaminated water “1,4-Dioxane Degrading Technology”
    • Compact drainage processing system
    • Bioremediation of Groundwater Contaminated by Chlorinated Ethenes Using Rhodococcus jostii Strain RHA1
    • Purification technology of the groundwater contaminated by chlorination ethylene

1 A system that varies the energy demand to achieve a balance between supply and demand.

2 BIM: building information model; VR: virtual reality (both 3D technologies); CIM: Construction Information Modeling

3 Geographic information system

4 Assesses effects of creating a space that considers biodiversity by showing the organisms that may potentially visit.

5 Material safety data sheet

6 Business providing comprehensive services including energy-saving proposals, provision of facilities, maintenance, and management.

7 Sodium-sulfur batteries

8 A business method similar to the private finance initiative (PFI) in which the public sector takes on fund-raising and contracts design, construction, and operation to the private sector.

Calculation Standard for Environmental Data and Indices FY2015

Objective Item Calculation Method & Standard
Material flow-related Classification by business type Classification into civil engineering and building construction (sites), offices (excluding development projects and others), and factories
CO2 emissions Scope classification Scope 1: CO2 emissions associated with the combustion of fossil fuels
Scope 2: Indirect CO2 emissions associated with the use of electricity, steam, and chilled and hot water
Scope 3: CO2 emissions associated with the transport of construction waste off construction sites and the outward
and return transport of soil from construction (off-site emissions)
CO2 emissions CO2 emission coefficient: Calculated using the emission coefficient in accordance with the Act to Rationalize the Use of Diesel, Heavy Oil, and Energy and the Act on Promotion of Global Warming Countermeasures. For offices, the actual emission coefficient for FY2014 according to the electrical power company is used.
Electrical power: Calculated using the 2014 emission coefficient on the user end announced by the Federation of Electrical Power Industries of Japan (before reflecting the Kyoto credit), 0.554t- CO2 / Mwh.
City gas: Calculated using the standard calorific value of the gas supply company and the emission coefficient of the Act on Promotion of Global Warming Countermeasures.
NOx and SOx emissions Calculation of NOx and SOx emissions originating from diesel, heavy oil, and kerosene of the Taisei Corporation Group. Calculated using the emission coefficient of the Architectural Institute of Japan’s "Guide to Building LCA - Evaluation Tool for Measures against Global Warming, Resource Consumption, and Waste - Revised Version."
[Offices and Factories] Energy-related and water consumption The annual quantities purchased and used by the offices and factories of the Taisei Corporation Group are calculated in monthly units.
[Civil Engineering and building construction (sites)]
Energy-related and water consumption
Calculated for each company based on the Taisei Corporation Group environmental data manual. Consumption in a two-month period in FY2015 is sampled at 166 construction sites to calculate the consumption per unit of construction turnover (basic unit). Annual consumption is calculated by multiplying this basic unit by the construction turnover for the year. For civil engineering, this calculation is performed for each construction type.
[Civil Engineering and building construction (sites)] Calculation of the main construction materials and other materials (concrete formworks and alternative formworks) purchased. The quantities of the main construction materials and other materials purchased directly through individual construction of Taisei Corporation and joint venture construction for which Taisei Corporation is the representative.
The same calculation method applies to the consumption of concrete formworks and alternative formworks.
[Civil engineering and building construction (sites)] Calculation of chlorofluorocarbons and halon recovered. Recovered quantity of chlorofluorocarbon and halon processing commissioned by Taisei Corporation Group.
[Civil engineering and building construction (sites)] Calculation of construction soil emissions Surplus construction soil removed from construction sites of Taisei Corporation.
[Civil engineering, building construction (sites), and factories] Calculation of construction and industrial waste emissions Construction by-products (waste and valuable resources) emitted at the sites of the Taisei Corporation Group’s individual construction projects, joint venture construction for which Taisei Corporation Group is the representative, and factories owned by Taisei Corporation Group.
Prevention of
global warming
Estimated CO2 emissions and reduction rate in the construction stage Calculated using the "Energy Efficiency Plan" for each of 29 projects, each with a total floor area of 300m2 or more and with a total area of about 550,000m2, of Taisei Corporation building construction projects.
CO2 emissions and reduction rate in the construction stage CO2 emissions at Taisei Corporation construction sites and percentage of CO2 emissions reduced from FY1990 emissions. In some cases, temporary or special construction that has a major effect on the data continuity has been excluded from the calculation.
Resource recycling Results for adoption of green procurement items Calculated the quantities based on the design specifications by Eco Sheet CASBEE introduced to buildings designed by Taisei Corporation
Final disposal rate (final disposal quantity / quantity arising) x 100 (excluding construction sludge and quantities not attributable to Taisei Corporation)
  • Organization covered: the Taisei Corporation Group (Taisei Corporation, Taisei Rotec Corporation, Taisei-Yuraku Real Estate Co., Ltd., TAISEI U-LEC CO., LTD., TAISEI SETSUBI CO., LTD., TAISEI HOUSING CORPORATION, SEIWA RENEWAL WORKS CO., LTD., and J-FAST Co., Ltd.), which are all within Japan only.
    Environmental data cover more than 90% of the sales made by the entire Taisei Corporation Group.
  • Calculation standard: Calculated based on in-house standards and the Taisei Corporation Group's environmental data calculation manual for the management of environmental information, complying with the Act on the Rational Use of Energy, the Act on Promotion of Global Warming Countermeasures, the Waste Disposal and Public Cleansing Act, the Fluorocarbons Recovery and Destruction Act, the GHG Protocol and the Guide to Building LCA, etc.
    In calculation of CO₂ emissions and NOx and SOx emissions, Taisei Corporation uses the value of the fuel consumption of the Japan Construction Mechanization Association, from which the fat content is excluded.
  • Energy-related: Fossil fuels (heavy oil, diesel, gasoline, kerosene), electrical power, city gas, and LPG consumption and their energy-equivalent values.
  • Energy-saving Plan: A plan that summarizes the measures for the efficient use of energy such as building thermal insulation, air conditioning services, etc., which is required to be submitted when designing buildings with a total floor area of 300 m2 or more in accordance with the Act on the Rational Use of Energy.