Utilization of Japanese Timber

In Japan, the public and private sectors are working together to increase the self-sufficiency rate of domestic wood in order to achieve carbon neutrality and a decarbonized society by 2050.

Initiatives to Promote the Use of Domestic Timber in Kyushu

In February 2022, Sumitomo Forestry concluded a basic location agreement with Shibushi City, Kagoshima Prefecture, regarding business verification in the city. This Shibushi project is the first step toward the establishment of a timber industrial complex, which is Sumitomo Forestry's concept for promoting “wood change”.

In 2020, wood shortages and soaring prices ‒ in other words, a wood shock, occurred globally due to increased demand for housing construction in the United States and a container shortage caused by the spread of coronavirus disease (COVID-19). Japan, which relies on imports for approximately 60% of its wood supply, is greatly affected by imports in terms of both price and volume, making the promotion of the use of domestic timber a national challenge. In order to promote the use of domestic timber, it is necessary to establish a stable supply system that will ensure business profitability for everyone from forestry workers to timber manufacturers, processors, and builders.

Aiming to Establish a Timber Industrial Complex to Promote the Use of Domestic Timber

In order to solve these issues, Sumitomo Forestry is considering the construction of a new plant to process low-grade timber*, which is currently exported as logs from the Port of Shibushi, into high-strength structural materials with added values, aiming for a stable supply to the domestic market and export of products from the Port of Shibushi to Asia and North America.

By establishing a timber industrial complex based on the cascade use of domestic timber, Sumitomo Forestry will raise productivity of its timber manufacturing and ensure a stable supply of timber products, thereby strengthening its price competitiveness. In addition, we will promote the creation of employment opportunities for forestry workers by increasing the added value of wood, the use of domestic timber, and contribute to decarbonization by increasing the period of carbon storage.

*Timber that cannot be used for lumber or plywood due to size, crook, knots, rottenness, etc. and is exported.

Utilization of Wood Resources

Recycling of Wood Resources into Chips

The Sumitomo Forestry Group contributes to resource recycling through its wood chip operations, whereby offcuts generated during the wood milling process and wood waste from new housing construction and demolition sites are turned into wood chips to be used as a raw material for products such as paper and particle board, and also as a fuel for power-generating boilers or other equipment.

As demand for the supply of fuel for biomass power generation continues to rise, we aim to further expand the handled volume of fuel applications by using not only offcuts and wood waste but also thinnings and other unused forest resource.

Handling Volume of Wood Chips*

*The aggregation period for fiscal 2020 onwards is January to December of each year, and the aggregation period fiscal 2019 is April to March of the following year.

Promotion for Sales of KIKORIN-PLYWOOD

The Sumitomo Forestry Group has set a target for the percentage of procurement of imported wood board products, such as plywood, that are made of certified timber and planted forest wood, and has been working to expand sales of these products. Among these products, JAS Plywood that uses 50% or more FSC-certified or PEFC- certified timber and sustainable planted forest wood is marketed as "KIKORIN- PLYWOOD," and some of its revenue is invested in forestry business implemented in Indonesia. This product made using 50% or more certified timber or planted forest wood, was praised as being environmentally conscious. It received an encouragement prize in the 1st EcoPro Awards* on September 2018. From fiscal 2021, the definition of "KIKORIN-PLYWOOD" has aligned with Sumitomo Forestry Group's Wood Procurement Standards as "plywood using 100% of sustainable certified timber," and we will strive to further expand sales. Sales performance in fiscal 2023 under new definition are295,691m³.

*Hosted by the Japan Environmental Management Association for Industry. It was established in fiscal 2004 in order to help further develop and spread the use of Japanese eco-products by broadly communicating information about eco-products among current and prospective clients while also supporting the efforts of the relevant suppliers. The EcoProducts Awards were renovated in fiscal 2018, now presented as the EcoPro Awards.

Medium to Large-Scale Wooden Construction Business Initiatives

Sumitomo Forestry has been engaging in forest management for more than 330 years. In addition, we create living spaces which take advantage of wood through our expertise in the various properties of wood worldwide. The development of a truly broad scope of experience, knowledge and technology promotes the Construction (Timber Solutions) Business specialized in proposing wooden non- residential medium- to large-scale construction. Trees absorb CO₂ from the atmosphere through photosynthesis and continue to fix it as carbon even after being harvested as wood products, so expanding the use of wood in this way will contribute to building a decarbonized society. In recent years, in 2017, Sumitomo Forestry formed a business and capital alliance with Kumagai Gumi, which has a large number of construction achievements in the civil engineering and building business fields in Japan and abroad. In 2021, we integrated Cohnan Kensetsu Inc. into the Group, which has expertise in steel/reinforced concrete construction and management of construction. Combining their expertise with Sumitomo Forestry's wooden constructions and interior/exterior use of wood technologies, we will expand into medium- to large-scale wooden constructions and other non-residential fields. The MOCCA (Timber Solutions) business will also contribute even more to the realization of a sustainable society in harmony with the environment and economy by sharing a culture of wood and revitalizing forestry.

Medium- to large-scale Wooden Constructions Brand "with TREE"

In 2021, Sumitomo Forestry and Kumagai Gumi launched the "with TREE," a brand of medium- to large-scale wooden constructions. The concept is "architecture good for both the environment and your health." We provide new value created by "wood" in urban architecture and promote MOCCA (Timber Solutions) business in medium- to large-scale constructions. The project will combine Sumitomo Forestry's knowledge of forests and wood with Kumagai Gumi's knowledge of steel frame, RC, and large-scale construction to strengthen the cooperative framework. We have launched this brand as an initiative in the field of medium- to large-scale wooden constructions, which has been the mainstay of our collaboration since the business and capital alliance in 2017, and we will propose to enhance "environmental value" and "health value" from material procurement to construction and consulting.

Construction of "with TREE" Completed in Sapporo

On March 6, 2023, Sumitomo Forestry and Kumagai Gumi completed the KAGA Project, a 10-story fire-resistant wooden building with first basement. It was the first project of the "with TREE" medium- to large-scale wooden constructions brand. The upper floors are made of hybrid laminated engineered wood, and Hokkaido Japanese larch is used as cladding for pillars and beams to help revitalize the domestic forestry industry. Trees absorb CO₂ from the atmosphere through photosynthesis and continue to fix it as carbon even after being harvested as wood products. Sumitomo Forestry will contribute to the realization of a decarbonized society through woodification and use of wood of medium- and large-scale buildings.

Completion of Sumitomo Forestry’s First Four-Story Fire-Resistant Wooden Nursing Home

In May 2023, Sumitomo Forestry completed construction of the Nishi-Tokyo Project, the first four-story fireproof private elderly care facilities with nursing care designed and constructed by Sumitomo Forestry. Office and dining room on the first floor is an open space that takes advantage of characteristics of RC construction, living rooms on the second to fourth floors have the same floor space taking advantage of characteristics of two-by-four construction method. All stairs from the second floor to the fourth floor are made of wood to reduce burden on body and contribute to improving hospitality of users. Effect of alleviating human beings' psychological and physical stress of the "wood" enhance the comfort of the building space.

Completion of Joto Techno Development Test Center, First JV with Cohnan Kensetsu Inc.

After Cohnan Kensetsu became a part of the Sumitomo Forestry Group in January 2021, first design and construction project by joint venture of these two companies was completed. Joto Techno Development Test Center is a three-story steel structure. Part of conference room and entrance are made of wood, creating a comfortable space that makes use of relaxing effect of wood, humidity control, and antibacterial action. Layout of facility, such as usability of test machine and flow of researchers, was designed with reference to Tsukuba Research Institute, which is responsible for research and technological development of Sumitomo Forestry. Part of rooftop is greened as a place of relaxation for employees. We will continue to promote use of wood in medium-to-large-scale buildings by combining Cohnan Kensetsu's knowledge of steel frame construction and management of construction with Sumitomo Forestry's use of wood technology.

Construction of Sumitomo Pavilion at Expo 2025 Osaka started

A property of JV between Sumitomo Mitsui Construction Co., Ltd. and its partner was started in December 2023. This design has an impact that reminds you of peak of Mt. Besshi, which is foundation of Sumitomo’s development.
This pavilion is a two-story steel-framed and partly wooden pavilion with a total floor area of approximately 2,700 m³. Plywood cut from company-owned forests is used for exterior walls and roof.
In EXPO 2025 Osaka Kansai, use of wood is delivered to all visitors as a symbol of wood utilization.

Construction of Shibaura PJ, Minato started

In April 2023, construction of a nine-story RC, S and wooden property designed and constructed in a joint venture with MAEDA CORPORATION started.
Incorporating wood into RC structure creates a spacious space without wooden seismic walls while maintaining its seismic resistance. Wood is used in particular for the exterior walls, which are easy to notice, to give users a sense of secureness of wood.
As a residence rooted in people's lives, we aim to realize a decarbonized society.

Building No. 15, Yotsuya Campus, Sophia University Completed

Building No. 15, Yotsuya Campus, Sophia University, designed and constructed by Sumitomo Forestry, was completed in June 2022.

The three-story wooden, fire-resistant structure reduces CO₂ emissions during the manufacture of materials for the structural framework compared to similar facilities built with general reinforced concrete or with steel frames*¹ by 15% and 20% respectively. The structural framework uses 111.85 m³ of wood and stores about 84 tons of carbon (on a CO₂ basis), equivalent to the carbon storage of about 280 trees*² of 40-year old Japanese cedar. This facility will lead to the "transform cities into forests," contributing to theachievement of the SDGs and the realization of a decarbonized society.
The facility received numerous awards, including the Encouragement Prize at the Wood City TOKYO Model Architecture Award in January 2023 and the Wood Utilization Contest in March 2023.

*1The number of members of the facility's structural framework was calculated based on structural calculations when the facility's structural framework was made of reinforced concrete and steel, and the results were compared with the respective CO₂ emissions calculations.

*2Forestry Agency’s guidelines for calculation and indication of carbon storage of wood used for buildings Calculated with reference to Forestry Agency website.

Wooden Post Office with CLT

Sumitomo Forestry constructed Maruyama Post Office (Minamiboso City, Chiba Prefecture), the first post office in Japan to utilize cross- laminated timber (CLT)*¹. Maruyama Post Office is the first of the environmentally sound post offices ("+ (Plus) Eco Post Offices") promoted by the Japan Post Group, which aims to achieve carbon neutrality, and opened in March 2022.
The exterior walls are made of "yakisugi*²" cedar wood produced in Chiba Prefecture. The building is loved by the community for its yakisugi production with local children as a workshop event.
In addition to utilizing "wood" as a recyclable resource, we have also installed a private power generation system using solar power.
The facility received the Encouragement Award of the Japan Wood Design Award (Review Committee Chair Award) in 2022 and Chiba Archi Award in March, 2023.

*1Cross-laminated timber. Thick panels made by laminating long planks of wood in alternating lengths and widths, providing superior strength and thermal insulation.

*2A "burnt cedar board" is a wood board whose surface is burnt and carbonized. Its carbonized layer is fireproof, antiseptic, and termite-proof.

Research and development aimed at realizing a decarbonized society

The Sumitomo Forestry Group announced its W350 Plan in 2018 and Mission TREEING 2030 in 2022. In order to contribute to the achievement of Sumitomo Forestry's goal of decarbonization and the realization of a circular bioeconomy not only through housing and construction, but also through various upstream and downstream business activities centered on "wood", Tsukuba Research Institute will promote research and development with the aim of realizing a Timberized Eco City that turns cities into forests through various future technologies, including innovative construction technologies, new wood materials and new tree species.

By implementing the results of our research and development into society, we will revitalize the forestry industry with increased demand of wood and mitigate climate change with increased CO₂ fixation, etc.; thus, we will contribute to invigorate the community and to realize coexistence with the global environment.

Partially Implementing the Results of R&D

One of the new technologies developed by Tsukuba Research Institute, a hybrid laminated engineered wood perforated beam*, of one-hour fire-resistant structure, has been adopted for the KAGA Project, which is under construction by a joint venture between Sumitomo Forestry and Kumagai Gumi.

The KAGA project is using hybrid laminated engineered wood on the 7th through 10th floors, and by using Hokkaido Japanese larch for the timber, the project is helping to revitalize the domestic forestry industry. The beams are made of hybrid laminated engineered wood perforated beams, which allow pipes to penetrate directly through the beams, thus ensuring a higher ceiling height than conventional hybrid laminated engineered wood beams, and increasing the degree of design freedom. It also eliminates the need to install bulky materials for equipment piping, leading to lower overall construction costs and expanded versatility.
The wood used for the facility's structural framework is 39.9 m³, with about 31.8 tons of carbon storage (on a CO₂ basis). This is equivalent to the amount of CO₂ absorbed by a Japanese larch forest approximately 7.2 times the size of the planned site (139.05 m²). These facilities will transform the city into a forest and help create a decarbonized society.

*The new certification was jointly obtained by adding the beam penetration technology developed by Sumitomo Forestry to the one-hour fire-resistant certified beams of hybrid laminated engineered wood for which Japan Laminated Wood Products Association has obtained ministerial certification.