Sustainability

The OPEN HOUSE Group promotes sustainability aiming to contribute to the realization of a sustainable society through our business activities while achieving sustainable corporate growth. Recognizing that our business activities affect the environment, we will promote initiatives to reduce environmental impact and conserve the environment, both within the Group and throughout our entire value chain.
Our environmental conservation activities are conducted based on our “OPEN HOUSE Group’s Environmental Policy.”

The Group recognizes that climate change is a critical management issue that has a significant impact on business activities and poses a risk to the Group’s goal of “providing housing that customers desire.”
Efforts towards decarbonization are accelerating, including the agreement and enforcement of the Paris Agreement in 2015 and the Japanese government‘s declaration of carbon neutrality by 2050 in 2020.
Under these circumstances, our Group has identified “Contributing to a Decarbonized Society” as one of our materiality issues and has been promoting environmental conservation activities and decarbonization projects. We are also working to reduce greenhouse gas emissions by promoting efficient energy use and the utilization of renewable energy at our business sites and in the housing we provide to customers. Through these efforts, we aim to mitigate the impact of our business activities on climate change.
Going forward, we will expand our specific initiatives through dialogue with our stakeholders.

Agreement with the Recommendations of TCFD

In January 2021, the Group declared its agreement with the recommendations of the Task Force on Climate-related Financial Disclosures (TCFD) to companies for disclosing information regarding risks and opportunities related to climate change. As a member of the TCFD Consortium, a group of Japanese companies that are in agreement with the TCFD, we are working to provide disclosures in line with the TCFD recommendations.

The Group considers that climate change due to greenhouse gas emissions will have a significant impact on the long-term sustainability of society. In addition, we recognize that abnormal weather and natural disasters caused by climate change could pose serious risks to our business activities and growth. We are therefore promoting initiatives on various fronts, such as reducing greenhouse gas emissions associated with business activities and promoting energy-saving in houses.
Our initiatives to reduce greenhouse gas emissions in each business year are as follows.

GHG Emissions

Unit: t-CO₂

*Calculation scope: Open House Group Co., Ltd. and its consolidated subsidiaries (excluding overseas operations, etc.)
*Category 8, 9, 10, 13, 14 and 15 are not applicable

Third-Party Assurance

Our company has obtained third-party assurance for our GHG emissions.

Scope 1, 2, & 3 Emissions and Intensity

Energy Consumption by Type

Unit: GJ

*Calculation scope: Open House Group Co., Ltd. and its consolidated subsidiaries (excluding overseas operations, etc.)

Initiatives to Reduce Greenhouse Gas Emissions and Promote Energy-Saving in Products

We use insulation materials in all of our buildings. We aim to reduce the environmental impact of customers living in the houses we supply. To do this, we build houses that have high air conditioning efficiency by insulating all walls, etc. that are in contact with outside air using high-performance glass wool that has superior airtightness and moisture repelling properties to ordinary glass wool.
Moreover, at Open House Architect Co., Ltd., non-fluorocarbon insulation materials are used for all insulation to create houses that take LCCO2* into consideration.
Until now, fluorocarbon gas has been used as a foaming agent to create plastic-foam type insulation material. However, the fluorocarbon gas released in the manufacture, use, and disposal of insulation materials destroyed the ozone layer and had a significant impact on global warming, and its use is now restricted. The substitute fluorocarbon that has been used in its place does not harm the ozone layer; however, it has a powerful greenhouse effect. Therefore, the government has been promoting the use of non-fluorocarbon products.
In addition, our group conducts forest conservation activities "Open House Forest Training" in line with our business initiatives.
The purpose of this training is to contribute to the maintenance of multi-functional forests, such as carbon dioxide absorption and biodiversity conservation, as part of the "Regional Co-creation Project" promoted by our group.
The area of the "Open House Forest " is about 2.5ha, and the mean quantity of carbon dioxide absorbed by the forest trees is estimated to be about 149t.

* LCCO2: The CO2 emission reduction effect over the life cycle of a building. It refers to the total amount of CO2 emissions from the construction to demolition and disposal of a building.

ZEH* Promotion Targets and Results

* ZEH: Net zero energy house

Open House Development Co., Ltd.

Fiscal year: April of the year to March of the following year

Open House Architect Co., Ltd.

Fiscal year: April of the year to March of the following year

The Group companies, Open House Architect Co., Ltd. and Open House Development Co., Ltd., have been registered as "ZEH Builders/Planners" with the Sustainable Open Innovation Initiative (SII). The Group will continue its efforts towards the widespread adoption of ZEH.

Compliance with Housing Performance Indication System

The housing performance indication system is designed to allow comparison and consideration of the functions of newly built houses such as earthquake resistance and energy-saving in advance. The system involves objective evaluations of the house by a third-party institution at the design and construction phases according to common rules. The Group makes proposals that comply with the housing performance indication system at customers’ request.

ONE TREE MAKE A FOREST PROJECT

The Group understands the importance of preserving the natural environment. As part of our commitment, we strategically incorporate green spaces in our housing developments, even within the constraints of limited land areas. This approach not only enhances the living environment but also contributes to biodiversity conservation.
We are working to conserve biodiversity by promoting the planting of detached houses in central Tokyo using ONE TREE, MAKE A FOREST PROJECT that we are developing in our group's detached house business, which makes the most of our experienced and planning capabilities in constructing detached houses in central Tokyo, thereby promoting the creation of a greener environment.

Because we do not have our own tenants or factories, tap water is the main source of the water that we use. A certain amount of water is required at construction sites, however given the amount of use, there is no serious concern over water risk for the foreseeable future.
However, we recognize the possibility of increasing construction costs due to disaster response caused by climate change. To ensure that everyone can use hygienic water in a sustainable state, we see a need for policies to prevent over-consumption of the water used in the real estate that we provide.
As a company that offers homes for people’s everyday lives, we strive to streamline and improve water use by not only encouraging employees and construction sites to conserve water, but also by engaging our supply chain.

Water Conservation Initiatives

We create internal awareness about water conservation through regular internal notifications. With the recognition that water is a limited resource, each of our employees takes care to conserve water not only at our business locations, but also in their everyday lives. We are working to instill an awareness of reducing the amount of water usage throughout the entire Group.

Water Usage

At single-family home construction sites, the majority of water usage is for foundation and ground improvement work. We expect an increase in our water usage proportionate to the increase in houses constructed as we grow. Looking ahead, we will continue to manage the amount of water usage on construction sites, being mindful to save water.

Water Consumption (Water withdrawal: water supply)

Water withdrawal is only from the water supply.

Water discharge (Drainage destination: sewage)

There is no discharge destination other than the sewer system.

[Note on calculation data]
Subject of the calculation: Clean water usage at construction sites of single-family homes

The OPEN HOUSE Group uses the Aqueduct assessment tool developed by the World Resources Institute (WRI) to recognize water stress and risk at its business sites. We confirm the assessment of water stress and water risk at our main business sites in Japan and overseas.
Aqueduct is a tool that maps the water risks such as flooding, drought, and water stress, then provides users around the world with water-related information to encourage best practices in water resource management.
To promote appropriate water use going forward, we will conduct periodic risk assessments of each major business area to assess the situation and make employees aware of saving water, aiming to ascertain and reduce water risks.

Water Risk Assessment (2024)

* Aqueduct assessment standard

Unit: t

The OPEN HOUSE Group recognizes that using limited resources without waste and reducing waste by recycling and so forth is an important priority for conserving the environment.
To help create a recycling-oriented society, we comply with laws, regulations, and ordinances regarding air, water, and soil pollution, as well as other harmful substances, and strive to prevent environmental pollution by curbing emissions of pollutants. We also manage and process industrial waste generated during construction appropriately, and work to prevent impacts from harmful substances on the environment and building users’ health. Moreover, the Group selects waste collection providers that put an emphasis on reuse of resources. For waste that cannot be reused or recycled, we will process it correctly and work to prevent impacts of the waste on the environment.

The majority of the waste in our businesses is associated with construction materials.
To reduce waste, we order interior wall materials pre-cut to size and have them shipped to the building site. We do the same with exterior wall materials as well.
Open House Architect Co., Ltd. uses factory pre-cut materials in a proprietary panel construction method that increases the efficiency of material processing and reduces material loss.

Furthermore, the entire OPEN HOUSE Group actively uses construction materials that are easy to reuse. In doing so, we strive to create houses that help to reduce both CO2 emissions and the impact of houses on the global environment.

We are installing eco-stations at home games of the OPEN HOUSE Group’s Gunma Crane Thunders, a Japanese professional basketball team. The eco-stations are operated through cooperation with partner companies engaged in environmental businesses in the Gunma Crane Thunders’ hometown of Ota City, Gunma Prefecture. In addition to separating and weighing trash, the eco-stations create awareness about beautifying the local community and reducing waste.

Waste Generation

Unit: t

Aggregation scope: Open House Group (FY2021-2022), Open House & Meldia Group (FY2023 onwards)

Waste Generation (FY2024)

Third-Party Assurance

Our company has obtained third-party assurance for our waste generation volume.

With the growth of our business and the accompanying increase in the creation of harmful substances, we recognize that the reduced creation of waste and appropriate disposal are important management issues.
We also believe that reducing pollutant emissions is one responsibility of companies.
In cooperation with our supply chain, we are working to prevent emissions of harmful substances, to reduce pollutants by not using the materials that cause them, and to realize a recycling society through the appropriate use of resources.

The Group appropriately processes and controls harmful substances in accordance with various laws and regulations. As of fiscal 2024, there have been no violations of environmental laws and regulations or environmental accidents since fiscal 2017.

Unit: t

We have no business locations which have received environmental management certifications such as ISO14001 or EMAS.