Initiatives to Address Climate Change
We at Tokyu Construction have identified climate change (mitigation and adaptation) as a material issue and recognize that tackling climate change is a top priority. In our Long-Term Management Plan "To zero, from zero.", we have set decarbonization, zero waste and disaster risk reduction as three pillars of the value we provide, and are taking on the challenge of achieving net zero carbon emissions by being actively involved in relevant initiatives and implementing various measures.
Obtaining SBT Certification for Greenhouse Gas Emission Reduction Targets
To achieve the Paris Agreement goal of limiting the global temperature increase to below 1.5°C, we have obtained Science Based Targets (SBT) certification, an international framework for the reduction of greenhouse gas (GHG) emissions.
We have set medium- to long-term targets consistent with the 1.5°C standard and will implement initiatives to ensure steady progress toward achieving these targets.
Environmental Performance Data: 3-1. Greenhouse gas (GHG) emissions
As one of our climate change initiatives, we have obtained certification as a ZEB (Zero Energy Building) Planner and are promoting ZEB for new constructions and renovations.
CDP Response
Since 2019, we have been responding to the CDP Climate Change Questionnaire administered by CDP, an international organization that evaluates corporate initiatives related to environmental information disclosure.
On an eight-level evaluation scale ranging from A to D, we received a B− rating in FY2019 and an A rating in FY2024. We are continuously improving the areas identified through these evaluations and will promote the reduction of greenhouse gas (GHG) emissions and the mitigation of risks associated with environmental information disclosure.
Support for TCFD Recommendations
Tokyu Construction endorsed the recommendations of the Task Force on Climate-related Financial Disclosures (TCFD) in November 2020. We are now carrying out initiatives on climate-related disclosures. We will continue to work on better disclosures in line with the TCFD recommendations on the analysis of our corporate risks and opportunities from climate change, and our strategies based on the analysis results.
Participation in RE100
In March 2021, we joined the RE100 initiative, which brings together globally influential companies on the goal of achieving 100% renewable electricity for business activities. Our goal is to convert all our electricity consumption for business activities, including construction and offices, to electricity from renewable sources by 2030.
Pursuit of Three Values reducing climate change risks
Environmental Targets and Performance on Environmental Actions
Tokyu Construction has set targets for critical actions on tackling climate change and effective use of resources, and is continuously monitoring the progress on these actions.
Environmental Performance Data: 3-1. Greenhouse gas (GHG) emissions
Environmental Performance Data: 3-2. Energy consumed
Environmental Performance Data: 3-3. Fuel consumed
Environmental Performance Data: 3-4. Main materials
Environmental Performance Data: 3-5. Waste generated
FY2024 Non-consolidated Targets and Performance
| Action | Items | Category | Unit | FY2022 | FY2023 | FY2024 | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Performance | Performance | Target Value | Performance | Evaluation *1 | ||||||
| Climate Change Mitigation | 1 | CO2 Emission | Civil works | Tunnels | t-CO2 | 5,594 | 7,061 | 10,380 or less | 6,334 | ◎ |
| Other | t-CO2 | 15,381 | 6,988 | 10,053 or less | 6,505 | ◎ | ||||
| Domestic Construction | t-CO2 | 13,728 | 14,652 | 14,483 or less | 13,192 | 〇 | ||||
| Overseas Construction | t-CO2 | 3,691 | 8,344 | 5,944 or less | 5,818 | 〇 | ||||
| Effective Use of Resources | 2 | Waste plastic *2 | Civil works | m3/100 million yen | - | - | 6.90 or less | 8.24 | × | |
| Construction | m3/100 million yen | - | - | 7.30 or less | 6.61 | 〇 | ||||
| 3 | Mixed Waste *2 | Civil works | m3/100 million yen | - | - | 4.90 or less | 3.10 | ◎ | ||
| Construction | m3/100 million yen | - | - | 2.50 or less | 2.47 | 〇 | ||||
1 ◎:Well above target (10% or more above target) 〇:Target achieved ×:Target not achieved
2 Scope: Domestic new installations and new construction projects. Starting in FY2024, the performance indicator has been changed from total weight to unit intensity.
Click here for metrics and targets
FY2024 Contribution of In-house Architectural Design to Emissions Reduction During Use
Unit (t-CO2: standardized for 60-year service life)
| Number | Design emissions | Standard emissions | Emissions Reduction | Reduction rate | Notes | |
|---|---|---|---|---|---|---|
| Design part | 7 | 211,402 | 476,034 | 264,633 | 55,6% | Applicable only during operation after completion |
| Completion part | 12 | 260,612 | 568,896 | 308,284 | 54,2% | Applicable only during operation after completion |
Reducing Environmental Impact of Our Business Activities
Initiatives for Scopes 1 and 2 Emissions
Use of Electricity from Renewable Energy
As a member of RE100, we are committed to converting 100% of the electricity used in our business activities to renewable energy by FY2030, thereby contributing to the early realization of a decarbonized society. As part of this initiative, we collaborated with a solar power generation company to install 50 dedicated non-FIT solar power plants with a total generation capacity of 4,311 kW by FY2024. In FY2024, we acquired the environmental value of 4,372 MWh of electricity generated annually through Virtual Power Purchase Agreements (Virtual PPAs), achieving a reduction of 1,849 t-CO₂ in greenhouse gas emissions. This pioneering initiative, which introduced Virtual PPA services to address challenges unique to construction sites, was recognized with the Chairman’s Award for Installation Activities in the FY2023 New Energy Award presented by the New Energy Foundation.
In combination with our ongoing procurement of RE100-compliant renewable electricity, we achieved 23,389 MWh of renewable electricity for domestic construction projects in FY2024, resulting in an adoption rate of 88.8%.
Furthermore, we launched an on-site Power Purchase Agreement (PPA) service, under which we, as the power producer, install and operate solar power generation facilities on customer premises and directly supply the electricity generated. A facility with a generation capacity of 156 kW was completed and commenced operation in May 2024, supplying 111 MWh of electricity.
Tokyu Construction and Clean Energy Connect jointly awarded the FY2023 New Energy Award
Environmental Performance Data: 3-1. Greenhouse gas (GHG) emissions
Environmental Performance Data: 3-2. Energy consumed
Deployment of low-carbon fuels
Scope 1 emissions account for around 75% of all GHG emissions from construction sites. Furthermore, most of these Scope 1 emissions arise from the use of diesel fuel. As a measure to reduce the quantity of emissions from diesel fuel, we are promoting the deployment of GTL (gas to liquids) fuels, which are liquid fuels derived from natural gas that have properties similar to diesel fuel.
In April 2022, we also began introducing renewable diesel (RD), which is manufactured using waste cooking oil, animal and vegetable oils, etc. as raw materials. On an LCA basis, renewable diesel cuts CO2 emissions by about 90%. We also started to introduce B100 fuel in FY2023. B100 is a carbon-neutral fuel made from waste cooking oil that effectively reduces CO2 emissions by 100%. In FY2024, we replaced 194.3kL of diesel fuel use with GTL,6.7kL ,and 45.2kL with B5, thereby cutting CO2 emissions by a total of 66.8tonnes.
Initiatives for Scope 3 Emissions
ZEB and ZEH-M Initiatives
In our business, the CO2 emissions generated by buildings after we have completed them (Scope 3) is extremely high. Therefore, to help the customers who order construction from us to reduce emissions, we actively offer them building materials and equipment with low environmental impacts, as well as zero-energy buildings (ZEB) and zero-energy apartment buildings (ZEH-M). Since FY2016, we have offered ZEB and ZEH-M buildings based on our own designs. In FY2024, we completed the construction of five ZEB-designed buildings (“ZEB”: 2, ZEB Ready: 3, and ZEB Oriented: 0) and the design of five new ZEB buildings. The ZEB renovation of the Company’s Institute of Technology has cut energy consumption by 76 to 79% for seven straight years since it was completed. At all the ZEB buildings we complete, we collect detailed measurements (on air conditioning, ventilation, lighting, hot water supply, elevators, and PV solar systems) on a monthly basis, then compare design values with real-world measurements. Our support for energy management and the accumulation and verification of obtained data provides us with valuable feedback for the planning and design of ZEBs. To respond flexibly to the needs of our customers, we also registered as a “ZEH Developer,” so that we can contribute to the acceleration of decarbonization, not only of buildings, but also of residential construction.
Environmental Performance Data: 3-1. Greenhouse gas (GHG) emissions
Environmental Performance Data: 3-2. Energy consumed
Tools for ZEB and ZEH-M Solutions
We have developed and are operating simulation tools designed to serve as a catalyst for customers to engage in ZEB and ZEH-M initiatives. A demo version targeting office buildings was unveiled at the Technology Exhibition 2020 held in November 2020, and we subsequently enhanced its functionality by adding features such as building type selection and energy-saving technology options. The tool was made publicly available in March 2023. Moving forward, we will continue to develop practical ZEB and ZEH-M design proposal tools utilizing digital technologies, with the goal of becoming a leading company in the promotion of ZEB and ZEH-M initiatives.
Developing Technologies to Support the “Moctas” Brand of Wooden Construction
We are promoting timber and wooden architecture as one of our key initiatives toward realizing a decarbonized society, under our proprietary wooden construction brand “Moctas”. At our Technology Research Institute, we have developed multiple technologies that support the “Moctas” brand, including our original one-hour fire-resistant wooden column “Moctas WOOD (HC Fire-Resistant)”. This column features a wood-finished surface and can be used as a structural member up to 600 mm square. Part of the fireproof coating material utilizes by-products and recycled materials, making it an environmentally friendly material that contributes to the effective use of timber.
In a joint development project, we obtained structural certification from the Building Center of Japan for an 11-story office model designed using the “P&UA Structural System”, enabling the construction of mid- to high-rise wooden buildings with large open spaces and fewer walls.
Furthermore, our portable wooden structure “Moctas CUBE,” developed in-house, has been utilized as temporary housing for reconstruction workers and for the rebuilding of lacquerware workshops in Wajima following the Noto Peninsula Earthquake, earning high praise from users. To prepare for future emergencies such as natural disasters, we have also begun introducing and stockpiling these units for use as temporary site offices.
In the field of medium- and large-scale timber and wooden architecture, we have received strong recognition from clients for our achievements, including TQ Shibuya Udagawacho, our self-developed office building featuring a hybrid timber and reinforced concrete structure, which was completed in April 2025.
Specific Initiatives at Construction Sites
Greenhouse gas emissions from construction sites are mostly due to the use of heavy machineries and transportation vehicles. Reducing their use is essential to minimizing our environmental impact. As emissions from civil engineering works are particularly high, taking measures for the process of transporting earth dug out from the site and other materials results in significant emissions reduction, while simultaneously enhancing safety by reducing the number of vehicle trips. At Tokyu Construction, all our construction site employees and workers remain committed to cutting our CO2 emissions and minimizing our environmental impact.
Developing Materials for Reducing Environmental Impact
In the field of concrete, a major construction material, we are taking on the challenge of achieving decarbonization and zero waste by leveraging three technologies: CELBIC , a low-carbon concrete; SUSTAR , an alternative mortar with lower environmental impact; and concrete using electric arc furnace oxidizing slag as fine aggregates.
Development of Low-CO₂, Labor-Saving Concrete “High-Producrete”
Tokyu Construction, in collaboration with the Tokyo University of Science, has jointly developed “High-Producrete” (trademark pending), a type of concrete that achieves both CO₂ emission reduction and labor-saving construction. High-Producrete is a general term for high-productivity concrete, and the version developed in this project replaces a significant portion of Portland cement with supplementary cementitious materials (SCMs), while enhancing fluidity beyond conventional slump control.
Results from full-scale wall construction tests confirmed that, compared with conventional concrete, High-Producrete achieved up to a 73% reduction in CO₂ emissions and a 58% reduction in construction time, while also exhibiting excellent quality with fewer early-stage defects and surface air voids.
Green Infrastructure Demonstration Facility
As localized downpours in urban areas have become more frequent in recent years, we established a green infrastructure* demonstration facility that makes the most of the natural environment’s functions on the grounds of our Institute of Technology in 2018. The facility was designed with the key themes of storing, using and naturally circulating rainwater, as well as enabling living things to live and grow. The objectives were to verify (1) measures addressing urban torrential rains (stormwater runoff control and better infiltration) and (2) technologies related to environmental conservation (effective use of rainwater, facilitating water circulation, creating biotopes and habitats for plants and animals).
Green infrastructure: A concept that advocates making the most of the natural environment’s functions, such as disaster risk reduction and biodiversity conservation, to promote the development of sustainable communities.
Overview of the green infrastructure demonstration facility
Illustration showing measure for better stormwater infiltration
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The results of our environmental measurements showed the effectiveness of the stormwater storage and runoff control during torrential rains. Aside from functioning as a waterside biotope, the facility also mitigates the urban heat island effect. We also confirmed its effectiveness in conserving biodiversity by successfully breeding successive generations of the Japanese firefly (Luciola lateralis) released in the area and providing a habitat for birds and insects.
Using the data obtained from this demonstration facility, we are considering proposals for disaster risk reduction in urban areas as well as working on environmental conservation activities. We also hope to implement initiatives that involve local communities by utilizing the site for educational activities on biodiversity. 
Demonstration facility
Wildlife observed at the facility: Japanese tits, azure-winged magpies and Japanese fireflies