Climate Change

• Basic Approach & Policy
• Initiative Targets
• Initiatives to Reduce Our Own Emissions
• Initiatives to Reduce Emissions Across Our Supply Chain
• Group Initiatives

Basic Approach & Policy

The corporate philosophy of the Haseko Group is “To contribute to society by creating an optimal environment for cities and people,” and to bring this to fruition, we view responding to climate change as an important management issue. In line with the Haseko Group’s HASEKO ZERO-Emission climate change response policy, we are aiming to achieve carbon neutrality by 2050.
In addition, following the establishment of the “Haseko Group Climate Change Response Policy,” Haseko Corporation joined the Climate Change Initiative and the GX Future Consortium (formerly the TCFD Consortium). Through these organizations, we will collaborate with other companies, local governments, and organizations to address climate change and promote disclosure.

For disclosures based on the TCFD recommendations, please refer to the following:

• Disclosures Based on the Recommendations of the TCFD

Initiative Targets

KPIs in the HASEKO Evolution Plan medium-term business plan

For results, see ESG data.

• KPIs (environment) in the HASEKO Evolution Plan medium-term business plan: ESG data

Greenhouse gas (CO₂) emission reduction targets

• Scope 1: Direct emissions by the business itself
  Scope 2: Indirect emissions associated with consumption of electricity, heat, or steam purchased from outside
  Scope 3: Indirect emission other than Scope 1 or 2 (supply chain emissions related to the business’s activities)

CO₂ emissions reduction targets and results

The Haseko Group’s CO₂ emission reduction targets and results are as set out below.

For details on the scope of calculation and results, please refer to the ESG data.

• CO₂ emissions: ESG Data

Roadmap to target achievement

• The Haseko Group’s CO₂ Emissions Reduction Plan (Transition Plan)

Initiatives to Reduce Our Own Emissions

Scope 1: Fuel reduction and decarbonization

Initiatives on construction sites

Around 90% of emissions in the construction phase come from the use of diesel fuel, so we are undertaking initiatives that will lead to a reduction in fuel use. The main initiatives are as set out below.

Reduction of CO₂ emissions relating to transport

Industrial waste generated at construction sites is separated by type (wood waste, waste plastics, mixed waste, etc.) and processed by designated companies. Of these, mixed waste is generated over an extended period of time spanning the commencement of construction to completion of the building, notwithstanding significant reductions in volume generated. We reduce the distance over which waste is transported by selecting the waste processing company nearest to the construction site, from a pool of 7 companies and 14 plants in the Tokyo region and 10 companies and 20 plants in the Kansai region (as of April 1, 2026).
In addition, soil generated from excavation work is used as backfill material on the site to the greatest extent possible. By improving the efficiency of waste accumulation and transportation, less dump trucks are required, thus reducing CO₂ emissions. In addition, most of all waste soil that is removed from construction sites is processed for use in land reclamation, which is destructive on the environment. Thus, by reducing the amount of waste soil that leaves our construction sites, we contribute to environmental protection.

Building a waste cooking oil utilization system to provide an alternative fuel to diesel fuel

Replacing company vehicles with electric and hybrid vehicles

As a part of initiatives to reduce CO₂ emissions resulting from business activities, the Haseko Group is working on reducing the fuel used by its company vehicles and on their electrification.
We introduced eight electric vehicles at the Shiba Head Office in April 2024, and we also introduced two electric vehicles at the Hiranomachi Building in Osaka in September 2025. Regarding the shuttles used by the Furusato day-care center for people with dementia, we completed the rollout of 134 hybrids by March 2025.
These initiatives reduce the amount of gasoline that we use and enable us to reduce CO₂ emissions produced by our company vehicles, and also help to reduce the carbon emitted from the energy that we use.

Scope 2: Decarbonization of electric power

Switch to renewable energy for electric power

We are working to expand the introduction of renewable energy toward the reduction of Scope 2 emissions.

Initiatives on construction sites

In May 2023, Haseko Corporation’s construction sites achieved 100% renewable energy use, a feat followed by Haseko Group construction sites in March 2025.

• Excluding sites with pending applications for switching to renewable energy after the start of work, and sites that switched to a power company’s main power supply (non-renewable energy) prior to handover.

• Press release: Haseko Corporation Switches to 100% Renewable Energy at Construction Sites (Japanese Only)

Initiatives in offices

Toward achieving a switch to 100% renewable energy for electric power used in offices and at facilities owned by FY2026, we are working on switching to renewable energy with a focus on office buildings that we own or lease in full. When switching to electric power derived from renewable energy is not possible, or other such situations in leased buildings, we achieve a switch to renewable energy through the purchase of non-fossil fuel certificates.
Thanks to these initiatives, Scope 2 emissions from Group offices in FY2025 fell 12.7% year-on-year*.

• Calculation factored in all Group companies.

Initiatives for biomass power generation through the recycling of wood waste

In cooperation with an outside power generation company, we have introduced a resource recycling initiative to utilize renewable energy from biomass power generation, which uses wood waste generated at construction sites as part of its fuel, as a temporary power supply at construction sites. Power generation through this initiative results in lower CO₂ emissions than conventional thermal power generation, which will reduce CO₂ emissions generated by the supply of electricity.

Participation in the biomass power generation business

Haseko Corporation participates in biomass power generation business with the goal of achieving carbon neutrality.
We participate in a woody biomass power generation business in Ikoma City in Nara undertaken by TJ Group Holdings. Scrap wood and unused timber from the Kinki region will be used as fuel for generating power in the business, which makes it possible to supply locally produced and locally consumed electricity, including fuel for power generation, for users in the Kinki region. (Commercial operations started in April 2025.)
In Matsusaka City in Mie, we participate in a decarbonized power source development business undertaken by Power Aid Mie that uses hybrid fuel of only NON-FIT wood and manufacturing byproducts. In this business, waste recycled wood chips and plastic chips generated from various construction sites will be repurposed as fuel, leading to the reduction of the administrative burden of waste disposal operation and the contribution to the creation of a local circular resource and energy economy. (Commercial operations started in January 2025.)
Furthermore, electric power from power stations in Ikoma City, Nara Prefecture is supplied to offices, construction sites of Haseko Group companies, and other such locations.

Initiatives to Reduce Emissions Across Our Supply Chain

Scope 3 Category 1: Development and use of low-carbon materials

Development and adoption of “H-BA Concrete,” an environment-conscious concrete

Produced by blending ordinary Portland cement and blast furnace cement type-B, H-BA concrete is so versatile that it can replace conventional concrete. It is eco-conscious concrete that reduces CO₂ emissions derived from concrete materials by approximately 20%.
To date, it has been used in projects including a part of the common-use areas of Renai Yokohama Totsuka (Totsuka-ku, Yokohama City, Kanagawa; total 439 units) and the entirety of the Feel G Residence (foundations and above-ground framework), a rental condominium building targeting students (Nishi-ku, Kobe City, Hyogo; total 120 units). In August 2022, H-BA concrete obtained the Special Evaluation Method Certification^*1, which is recognized as an alternative evaluation method to methods that comply with the Evaluation Method Criteria^*2, from the Ministry of Land, Infrastructure, Transport and Tourism. This certification allows it to be used in for-sale condominiums that use dwelling performance indications.
Based on the Special Evaluation Method Certification, H-BA concrete has been adopted for the first time as sale condominiums for the entirety of the above-ground framework in the THE-KENSINGTON-RESIDENCE-KAMIIKEDAI (Ota-ku, Tokyo; total 42 units) in the Tokyo area, and the Renai Esaka Enokicho (Suita City, Osaka; total 149 units) in the Kansai area.
In order to achieve the Haseko Group’s greenhouse gas emission reduction targets, we will work to further promote the adoption of H-BA concrete, aiming for an adoption rate of at least 50% by FY2030.

• Special evaluation method certification: Certification method approved on an individual basis by the Minister of Land, Infrastructure, Transport and Tourism for new materials and construction methods (e.g., structural safety, reduced deterioration, thermal environment, sound environment) that cannot be evaluated in accordance with evaluation method criteria stipulated in the Housing Quality Assurance Act.
• Evaluation Method Criteria: Criteria for methods of evaluating housing performance to be indicated in accordance with the Japan Housing Performance Indication Standards stipulated in the Housing Quality Assurance Act.

• Revised aggregation method used from FY2025

• Haseko-style Decarbonization without Disrupting Current Practices: Protecting Tomorrow’s Environment and Today’s Construction Sites: We consider more. A sustainable future
• Concrete that reduces CO₂ emissions, H-BA concrete: Haseko-style eco-friendly concrete (Japanese Only)

Increasing wooden structures and use of wood in housing complex interiors/exteriors

Toward the reduction of CO₂ emissions through a building’s entire life cycle, the Haseko Group has been working on the use of wooden structures and wood materials for interiors and exteriors in condominiums since 2014. Our track record so far includes the use of hybrid structures of wood and reinforced concrete not only in condominium common buildings, but also in common areas and on the top floors of private-use areas, and as of July 2026, we have 26 completed properties and 12 properties under construction. Through our initiatives on the use of wood and wood materials, we believe that we can contribute to residents’ mental and physical health and their sense of happiness in addition to reducing our environmental impact, and are aiming to bring qualitative improvement to living environments.

Bransiesta Meguro Chuocho

Bransiesta Meguro Chuocho, which was completed in March 2025, is a rental apartment building for which HASEKO-version BIM was extended to make it compatible with wooden structures, and features a fire-resistant wooden construction on its top four floors. The building was selected for the FY2022 3rd Term Project for the Promotion of High-Quality Wooden Buildings, a subsidy program offered by the Ministry of Land, Infrastructure, Transport and Tourism.
In addition to being constructed from wood, this structure uses wood for its partition walls and finishing materials that employ wood chips as their base material, and through these and other such actions, the building stores about 690 t of CO₂. Furthermore, by using the environment-conscious H-BA concrete developed by Haseko Corporation in all sections made from reinforced concrete, we succeeded in reducing CO₂ emissions by around 590 t in construction when compared to a building made with ordinary reinforced concrete. This building also meets the ZEH-M Oriented standard, thus contributing to reduced CO₂ emissions during use of the building.
We will accumulate knowledge through the construction of this property and other projects that use wood and wood materials, and apply this knowledge to for-sale condominiums henceforth while also looking to take on the challenge of using wood in high-rise properties in the future.

• Press Release: Haseko Corporation concludes an agreement on the promotion of wooden structures and use of wood in housing with the Ministry of Agriculture, Forestry and Fisheries (Japanese Only)

Scope 3 Category 11: Switching to low-carbon buildings

Popularizing ZEH-M (ZEH Mansions, i.e. condominiums)

The Haseko Group recognizes that helping multi-family housing to save energy is a field in which we can make a major contribution to the achievement of a decarbonized society, and we are therefore working to popularize ZEH-M.
The Haseko Group, including Haseko Real Estate Development, and Sohgoh Real Estate, which are engaged in the condominium development business, will promote ZEH for new condominiums to be developed mainly by the Group. In addition, all condominiums for sale and rental condominiums held by the Group will meet the ZEH-M Oriented standard when they are designed in FY2022 or later.
As part of their efforts to date, Haseko Real Estate Development, and Sohgoh Real Estate are registered as ZEH Developers*¹ and Hosoda Corporation, which is engaged in the detached house business, is registered as a ZEH Builder*². Furthermore, we aim for properties to meet ZEH-M Oriented specifications by FY2030, including all new condominiums constructed by the Group.

For results of ZEH-M action, see the ESG data.

• KPIs (environment) in the HASEKO Evolution Plan medium-term business plan: ESG data

• A developer that plays a central role in forming ZEH-M projects by announcing to the public its Action Plan for ZEH-M Dissemination, Progress, ZEH-M Installation Plan, and ZEH-M Installation Results, based on the contents of the aims of a Net Zero Energy House demonstration project.
• A company that sets a business goal of increasing the percentage of ZEH, Nearly ZEH, and ZEH Oriented homes in its orders to 50% or more by FY2025, based on the ZEH Roadmap.

Definition of ZEH-M

The ZEH Roadmap Examination Committee for Condominiums established within METI defines ZEH-M by the number of floors as indicated below. ZEH for the residential building portion and ZEH for individual dwelling units are assessed individually and independently.

Cited and compiled from the Summary by the ZEH Roadmap Examination Committee for multi-family housing

Related technologies

• ZEH-M specification examination support tool (Japanese Only)

Proposing environment-conscious designs

In order to design condominiums taking into consideration the earth and the surrounding environment, Haseko Corporation makes design proposals utilizing the Environmental Consideration Check Sheet, which lists specific design proposals including saving energy and resources, consideration for the surrounding environment, long service life, consideration for human health, reduction in waste, and consideration for the global environment.
In FY2025, targeting “95% or higher adoption rate to the number of proposals made” on the Check Sheet, we made design proposals for 62 projects and obtained the following results.

Calculation of CO₂ reduction rate

In order to design condominiums with lower CO₂ emissions, Haseko Corporation calculates the CO₂ reduction rate by using the CO₂ Emissions Calculation Sheet. The Sheet computes the CO₂ reduction rate by converting into CO₂ emissions the standard value and the design value of primary energy consumption of condominium unit areas and communal areas calculated for each project using a Web program in accordance with the Act on the Improvement of Energy Consumption Performance of Buildings.
In FY2025, targeting a reduction of at least the same level as the previous fiscal year (result from previous year: 28%, comparison with standards in the Act on the Improvement of Energy Consumption Performance of Buildings), we implemented this initiative for 62 projects and obtained the following results.

Group Initiatives

Initiatives by Hosoda Corporation

Hosoda Corporation is proactively proposing products taking into consideration lower environmental burden and environmental symbiosis, aiming to create housing and communities that contribute to the global environment.

Promotion of energy-saving and zero-energy houses

Hosoda Corporation is making ongoing efforts to improve the energy-saving performance of houses in order to realize energy savings across society as a whole while improving the quality of life in areas such as convenience and comfort. By improving the insulation performance, etc. of exterior walls and windows and controlling the total energy consumption of buildings, its housing performance specifications adopt a standard that satisfies the Long-Life Quality Housing Standard (5-1 Thermal Insulation Performance Rating: 5, 5-2 Primary Energy Consumption Rating: 6). Furthermore, Hosoda Corporation aims to achieve a thermal insulation performance rating of 6 by 2030. The Company is also working on supplying “certified low-carbon houses” that reduce CO₂ emissions, as well as the Tokyo Metropolitan government’s proprietary concept of “Tokyo Zero Emission Houses,” which deliver a higher energy-saving performance by securing heat insulation and improving efficiency of facilities. In fiscal 2025, Hosoda Corporation supplied 69 net Zero Energy Houses (ZEHs), which achieve net-zero annual primary energy consumption by delivering higher thermal insulation and energy saving performance while also generating energy for use in the house by solar power or other means.

Initiatives for environmental symbiosis

Hosoda Corporation places importance on creating environment-conscious houses and communities to better the environment surrounding people and housing. Hosoda Corporation has been certified as the System Supply Type under the Environmentally Symbiotic Housing Certification with the objectives of Low Impact, High Contact and Health & Amenity. Its designs focus not only on the physical performance of housing, but also on qualities such as sunshine and wind flow. By planting abundant greenery around buildings, mitigating radiant heat, adjusting and utilizing rainwater, and taking other initiatives, Hosoda Corporation works on creating communities in harmony with the environment.

• Hosoda Corporation: CSR initiatives (Japanese Only)

Initiatives in connection with Haseko Anshindeli’s rice paddy fields

Haseko Anshindeli is a company engaged primarily in the cultivation of rice, and was established in January 2015.
In Japan, conventional agriculture that utilizes agricultural chemicals and chemical fertilizers is the norm. However, Haseko Anshindeli uses decarbonized and environmentally-friendly farming techniques.
An example is the rice farming technique of “mid-season draining” in which draining water from the paddies at a specific period in the middle of summer for around one to two weeks in order to improve yield and quality. Haseko Anshindeli extends this period by around one week, which minimizes the impact on rice yield while reducing the amount of methane produced.
We achieved a reduction of 46.6 t-CO₂ in fiscal 2025 as a result of decarbonized and environmentally-friendly farming techniques, at the core of which is this “extended mid-season draining” technique.

Goals for future initiatives

As around a quarter of greenhouse gases emitted worldwide are attributable to the agricultural sector, we aim for further reduction while continuing with business operations by measures such as using compost and reducing the volume of chemical fertilizers, and make progress in transitioning to organic farming to achieve better decarbonization.

Related Information

• Environmental Policy / Management System
• Disclosures Based on the Recommendations of the TCFD