Environmental Efforts

Environmental Declaration

Misawa Homes has announced a “New Environment Declaration” in 1997 as an environmental initiative. Since then, based on that declaration, we have developed a variety of environmental activities.

As a corporation that provides homes—the basic unit of social life—we the members of the Misawa Homes Group are focused on global environmental conservation. We proactively promote efforts to establish low-carbon societies, recycling societies, and societies that coexist with nature. We build safe & comfortable homes, and quality living environments in an effort to realize sustainable societies.
Code of Conduct
  1. Each and every member of the Misawa Homes Group conducts themselves with a firm understanding of the importance of global environmental issues while considering their role in environmental conservation.
  2. At each stage in the home lifecycle, we contribute to reducing CO2, use resources efficiently and contribute to the conservation of biodiversity.
  3. We observe environmental laws and regulations, and engage in corporate activities that nurture the environment in consideration of surroundings and local environments.
  4. We strive to communicate broadly with society through relatable environmental conservation activities.
  5. We undergo rigorous environmental training to develop into people capable of contributing to the realization of sustainable societies.

Environmental Management System

Misawa Homes Co., Ltd. formulated Environmental Policies based on the Environmental Declaration of the Misawa Homes Group, and uses them to confirm and observe laws and regulations, develop environmentally conscious products, engage in environmental conservation activities for Misawa Homes no Mori—community centers for environmental events and efforts—and implement many other business activities. Additionally, we confirm and provide guidance on aspects such as the operation status of the Environmental Management System to divisions engaged in environmental activities, and deliver reports on the matters to management.

Environmental Policies

Misawa Homes Co., Ltd. implements business activities based on the following policies and in consideration of the environmental philosophy of the Misawa Homes Group.

  1. We strive to maintain an accurate understanding of the environmental impact of our activities, products, and services, and to continuously improve the quality of our Environmental Management System by determining and regularly revising medium-term environmental objectives and environmental targets for each fiscal year in order to fulfill these Environmental Policies.
  2. We consider the environment and promote the creation of secure, comfortable homes and quality living environments throughout the home lifecycle.
  3. We work to conserve energy and resources and reduce waste in activities at each of our offices in an effort to reduce environmental impact.
  4. We make efforts toward environmental conservation by observing environmental laws, regulations, and agreements in addition to voluntary regulations and standards.
  5. We strive for broad, two-way communication with society and to strengthen environmental partnerships with everyone involved with our company through opportunities for collaborative activities, including environmental conservation and social contributions.
  6. We use environmental education to improve everyone’s environmental awareness, and implement environmental conservation activities in local communities and around the world with the aim of achieving sustainable societies.

Carbon neutral promotion structure


(as of April 2023)

Acquiring ISO 14001 Certification

On June 13, 1997, our Matsumoto Factory became the first in the industry to acquire ISO 14001 certification for satisfying the international standard for environmental management systems. Since then, eight more Misawa Homes production factories and even one of our affiliates have acquired the certification. We also strive for continuous improvement of business activities and complaint processing through efforts such as internal and external audits.

List of Misawa Homes Factories and Affiliates with ISO 14001 Certification 
List of Misawa Homes Factories and Affiliates with ISO 14001 Certification

* Factory for wooden components

(as of April 2023)

Material & Energy Flow

Data on Environmental Impact from Business Activities in FY2022 

Data on Environmental Impact from Business Activities in FY2022 

Basis for Material & Energy Flow Calculations 

Warranty indicators Calculation criteria/method Organizational warranty scope
Office,plant production,
Total energy CO2 emissions※1
  • Act on the Rational Use of Energy
  • Enforcement Order for the Act on Promotion of Global Warming Countermeasures
  • Manual for Calculating and Reporting Greenhouse Gas Emissions
  • (Ministry of the Environment, Ministry of Economy, Trade and Industry)
Office: Misawa Homes Co., Ltd.
Plant production: 7 wooden panel plants, 2 wooden components
Transport: Motor vehicles (for specific shippers), transport bases (for specific freight), motor vehicles/transport bases, etc.
Construction: Local retail/construction subsidiaries, etc.
Electricity (GJ), Municipal gas (GJ) Total CO2 emissions (t-CO2)
LPG (GJ), Gasoline (GJ)
Diesel (GJ), Kerosene (GJ)
LNG (GJ), Total (GJ), Water (m3)
By-product recycling volume
  • Waste Management and Public Cleansing Act
Plants: 6 woodworking plants, 2 plants for wooden parts, 1 ceramics plant Construction: Local retail/construction subsidiaries, etc.
Demolition waste generated※2
  • Construction Material Recycling Act
Retail/construction companies, etc.
M-Wood2 production
  • Compiled based on delivery statements provided to M-Wood2 buyers
Azusagawa Plant, etc.

*1 CO₂ emissions: Conversion to CO₂ emissions from different kinds of energy is based on the Ministry of the Environment’s “GHG Emissions Accounting, Reporting, and Disclosure System” and the “Actual and Adjusted Emission Coefficients Announced by Each Electric Power Company for FY2022.”
Conversion from water consumption to CO₂ is based on the “Handbook for Reporting Global Warming Prevention Measures” by the Bureau of Environment, Tokyo.

*2 Based on data from the Statistical Survey of Housing and Land (MLIT), and Overview of Wooden Building Demolition Work (Japan Demolition Contractors Association).

Scope 1, Scope 2, Scope 3

FY2023 CO2 Emissions in Scopes 1-3

As in other years, we disclose Scope 1, Scope 2, and Scope 3 emissions for FY2022 based on the Basic Guidelines for Calculating Greenhouse Gas Emissions Through Supply Chains endorsed by the Ministry of the Environment and the Ministry of Economy, Trade and Industry. We promote the sale of environmentally conscious homes that contribute to reducing the CO2 portion of Scope 3 emissions, especially when the homes are occupied. Note that we calculated emissions attributable to detached housing for the material procurement, treatment, and recycling stage as well as for the occupation stage.

Scope 1
CO2 emissions from fuel used by the Misawa Homes Group
Scope 2
CO2 emissions from electricity and the like purchased by the Misawa Homes Group
Scope 3
CO2 emissions throughout the supply chain, other than Scope 1 or Scope 2 emissions 
FY2021 CO2 Emissions in Scopes 1-3

Assumptions for Calculating the Data 

○ Scope of data (company): Misawa Homes including group companies and Techno Factories and Construction (factory).Construction and demolition includes sales construction companies.CO2 emissions in Scope 3 includes data from outside the Misawa Homes Group (raw materials, etc.)
○ Scope of data (project): All projects except for overseas and urban development projects
○ Scope of data (product): Industrialized houses (wooden panel construction method) and wood-frame houses (MJ-WOOD)
○Scope of data (term): Basically, FY2022 (April 2022 to March 2023). Due to limitations in data aggregation, some data are estimates of FY2022 results.
(excluding retail companies)
Resources: OA paper purchase volume Plant production Resources: Volume of resources input into new home production Occupation stage CO2: Estimated CO2 emissions during occupation of homes constructed in FY2021 (assuming an occupation period of 30 years)
Energy/CO2: Energy usage and CO2 emissions from the Head Office offices Energy/CO2: Energy usage and CO2 emissions from the 8 Misawa plants
Waste: Waste from the Head Office Waste: Waste from the 8 Misawa plants Demolition/waste CO2: CO2 emissions for the demolition and disposal of a home supplied in FY2020,30 years later
Material procurement CO2: Estimated CO2 emissions from production (LCA index, Architectural Institute of Japan) of materials input into new home production Construction stage Energy/CO2: Energy usage and CO2 emissions from construction by retail/construction companies, etc.
Transport stage Energy/CO2: Energy usage and CO2 emissions from specific carriers under the Act on the Rational Use of Energy Waste: Waste from new home construction sites Processing/recycling CO2: CO2 emissions from recycling material production used processed waste

Plant Performance

Environmental Performance of All Production Plants in Japan

Factory name Energy conservation (global warming prevention) Recycling
Crude oil equivalent (kL)(excluding water) CO2 emissions
Energy Water*2 Recycling volume(t)
Numata Factory 1,225 2,089 2,072 17 500
Okayama Factory 756 1,284 1,272 12 482
Fukuoka Factory 381 655 646 9 230
Sapporo Factory 302 575 575 0 586
Iwate Factory 228 392 388 4 73
Yamanashi Factory 445 823 818 5 63
Nagoya Factory 258 452 450 2 323
Matsumoto Factory*1 281 481 477 4 190
Toyama Factory*1 152 258 258 0 302

※1 wooden components
※2 Water includes tap water, river water and groundwater

Environmental Performance of All Production Factories in Japan
(FY 2022: PRTR Figures)

Factory name PRTR(t)
Total volume handled Air Water Soil Transfers
Consumption Recycling
Numata Factory 22.17 0.24 0.00 0.00 3.26 18.67 0.00
Okayama Factory 4.35 0.30 0.00 0.00 0.09 3.96 0.00
Fukuoka Factory 4.49 0.00 0.00 0.00 0.05 4.44 0.00
Sapporo Factory 1.99 0.03 0.26 0.00 0.04 1.67 0.00
Iwate Factory 1.17 0.03 0.00 0.00 0.01 1.13 0.00
Yamanashi Factory 3.63 0.00 0.10 0.00 0.05 3.48 0.00
Nagoya Factory 4.20 1.53 0.00 0.00 0.04 2.63 0.00
Matsumoto Factory*1 1.69 0.00 0.00 0.00 0.02 1.67 0.00
Toyama Factory*1 0.05 0.03 0.00 0.00 0.00 0.01 0.00

※1 wooden components

PRTR Survey Results (FY2022: Totals for All Factories)

Chemical substance Type End use Total
Total volume handled (t) Emission/transfer volume (t)
Air Water Soil Transfers
Consumption Recycling
Methylenebis (4,1-phenylene)-diisocyanate Type 1 Coating 17.27 0.00 0.00 0.00 0.2 17.1 0.0
Glyoxal Type 1 Raw material for adhesive 14.93 0.00 0.00 0.00 0.1 14.8 0.00
Iron (III) chloride Type 1 Wastewater treatment chemical 3.30 0.00 0.3 0.00 3.00 0.00 0.00
Triethylamine Type 1 Raw material for adhesive 3.18 0.00 0.00 0.00 0.00 3.1 0.00
Xylene Type 1 Coating, etc. 1.21 1.2 0.00 0.00 0.00 0.00 0.00
n-Hexane Type 1 Protective mold lubricant 1.30 0.20 0.00 0.00 0.10 1.00 0.00
Vinyl acetate Type 1 Raw material for adhesive 1.13 0.00 0.00 0.00 0.00 1.1 0.00
Triethylenetetramine Type 1 Adhesive for trim 0.40 0.00 0.00 0.00 0.00 0.4 0.00
2-(4-Ethoxyphenyl)-2-methylpropyl 3-phenoxybenzyl ether Type 1 Anticorrosion, antitermite agent 0.17 0.00 0.00 0.00 0.00 0.20 0.00
Hydrazine Type 1 Boiler drum-cleaning agent 0.11 0.00 0.1 0.00 0.00 0.00 0.00

*Totals may not add up due to rounding to the second decimal.