Promoting Sustainable Use of Wood
- Basic Policy and Approach
- Targets and Status of Achievement
- Promoting Use of Cross Laminated Timber (CLT)
- Making Use of Japan-grown Timber for Wall Frames and Structural Timber
- Manufacturing Environmentally-Friendly, Highly Durable Wall Panels with High Yield Strength
- Indoor Hut "HAKONOMA" Made of Japan-grown Timber
Basic Policy and Approach
The Mitsubishi Estate Group has established a policy of fostering harmony between nature and human society as part of the Mitsubishi Estate Group Basic Environmental Policy. The Group is committed to no gross deforestation and promoting the sustainable use of wood as it considers biodiversity through its business activities.
Moreover, in the area of Environment, one of the Key Themes stated in the Mitsubishi Estate Group 2030 Goals for SDGs, the Group has set goals for promoting the sustainable use of wood and ensuring the traceability of wood used in business activities. It will continue working for sustainable uses of wood giving consideration to respecting human rights and protecting natural resources in areas where imported timber is harvested.
Targets and Status of Achievement
From the perspective of human rights and environmental protection, the Mitsubishi Estate Group uses timber based on the Sustainable Sourcing Code (certified timber or Japan-grown timber) or equivalent as the timber in the concrete wall panels used when building offices or housing with a target of achieving a usage rate of 100% by fiscal 2030 to eliminate forest destruction. Moreover, in the Mitsubishi Estate Group Green Procurement Guidelines, the Group stipulates use of timber products certified by forest certification systems that can verify that they are from properly managed forest resources, and mandates consideration given to promoting the use of Japan-grown timber. This applies to all of the products, services, designs, and construction procured by the Mitsubishi Estate Group, and the Group requests the cooperation of all suppliers.
The Group also complies with policies on the sustainable use of timber and forest-related laws and regulations and has developed mechanisms to monitor and ensure compliance.
See the following for the Mitsubishi Estate Group’s latest Japan-grown timber usage rate.
Promoting Use of Cross Laminated Timber (CLT)
The Mitsubishi Estate Group promotes sustainable manufacturing by using Japan-grown timber. In recent years, the Group has promoted the use of cross laminated timber (CLT) as a construction material that expands timber usage opportunities.
Making Use of Japan-grown Timber for Wall Frames and Structural Timber
Mitsubishi Estate Home actively utilizes Japan-grown timber with clear traceability in order to ensure the appropriate use of forest resources and the sustainable development of the timber industry. By using Japanese timber in a sustainable way, the company helps to create sound and well-maintained forests, contributing to a forest cycle of "plant, raise, use, and plant."
Initiatives with material for wall frames
Example of construction of wall frames using Japan-grown timber
(Ichikawa Home Gallery)
Initiatives with structural timber
Since 2015, due to reasons including the revision of Japan Agricultural Standards for Japan-grown lumber and jointed lumber, Mitsubishi Estate Home has created a system for the stable procurement of domestically grown timber produced under thorough quality management, through such means as individually measuring the strength of each Japanese cedar lumber used for wall frames.
Mitsubishi Estate Home began using Japan-grown timber for its wall frames in new homes using the 2×4 method in all homes as a standard practice from November 2018. As a result, the percentage of Japan-grown timber used for the structural timber in new custom-built homes is 82%*, one of the highest percentages among 2×4 homebuilders in Japan.
- Estimate for Mitsubishi Estate Home product ONE ORDER
Projects to promote the use of Japan-grown timber
Example of use of Japan-grown timber
Mitsubishi Estate Group is working to promote efficient and increased use of timber grown in Yamanashi Prefecture through the initiative Project to Raise the Value of Japan-Grown Timber, in collaboration with the Group's initiative "Experience Nature" Project Brings Together Urban and Rural Communities, which strives to promote interaction between urban and rural residents in Hokuto City, Yamanashi. In April 2018, Mitsubishi Estate began using FSC-certified Japan-grown timber for the laminated wood used in floor structures as a standard practice.* The Group promotes the responsible use of forests in a way that is both economical and sustainable, and is working to create a cyclical society that coexists with nature.
In addition, Mitsubishi Estate Housing Components is promoting the use of Japan-grown timber in structural parts of single homes. In August 2010, it acquired an international standard (FSC-CoC certification) so that it could distinguish between these and other products in the chain of custody.
The FSC® (Forest Stewardship Council®) logo issued by the Forest Stewardship Council certifies that the wood or wood fibers used in a product were produced from forests managed properly in terms of the environment, society, and the economy. The mark provides a guarantee that the forest was assessed by an independent third-party organization based on principles and standards stipulated by the Council.
- Excludes some products
Building a network that can sustain a forest economy
Manufacturing Environmentally-Friendly, Highly Durable Wall Panels with High Yield Strength
Mitsubishi Estate Housing Components manufactures highly durable, high yield strength wall panels with approximately 14 times the strength of conventional panels for use in four-story wooden structures built with the 2×4 method. The panels use Shinshu larch for 24 mm thickness structural plywood, which is not normally used for houses. They also use domestic Japanese hinoki cypress and Japanese cedar for laminated wood and laminated wall supports. Additionally, 54% of the building's frame is made from Japan-grown timber, helping revitalize the domestic forestry industry. Furthermore, the insides of the wall panels are able to secure the equivalent of 68 tons of CO2, making them environmentally-friendly wooden structures.
Construction using highly durable, high yield strength wall panels
Indoor Hut "HAKONOMA" Made of Japan-grown Timber
Sales of HAKONOMA, an indoor hut conceived by Mitsubishi Estate and Mitsubishi Estate Residence began at Mitsubishi Estate Home in September 2019.
Placing HAKONOMA in a living room or other space can bring division or closure within a space, creating a new "place of one's own" in a dwelling. HAKONOMA comes from the "Experience Nature" Project Brings Together Urban and Rural Communities, which the Mitsubishi Estate Group has conducted for years in Yamanashi Prefecture to bring together urban and rural communities. The product is made using cedar wood produced in Yamanashi. Utilizing Japan-grown timber promotes cyclical use of forests, contributing to environmental preservation.
With COVID-19 resulting in a shift to working from home, Mitsubishi Estate Residence began offering HAKONOMA for work-from-home spaces in new condominiums beginning in June 2020.
Engagement with External Stakeholders
In September 2018, Mitsubishi Estate initiated the Construction and Real Estate Human Rights Due Diligence Study Group in which eight real estate and construction-related companies participate. As part of this initiative, the company holds study groups with other companies in these industries on the use of sustainably sourced timber from the perspective of environmental protection and respect for human rights. The aim of discussions at the study group is to deepen understanding about the risks of environmental destruction, including violation of human rights and destruction of forests and to expand the use of sustainably sourced timber going forward.
See the following for more details on the study group.