UTILIZATION OF REGIONAL FOREST RESOURCES
TIMBER PRODUCT
A renewable material
Timber stands out as the only fully renewable resource in the construction sector, offering a range of applications from solid and glulam frames to cross-laminated timber (CLT) panels, wall boards, insulation, and even heating energy. In Japan, harvested wood is predominantly utilized as a sawn product, representing the primary use of forest resources in many regions. Sustainable practices, including responsible plantation and harvesting, are crucial for maintaining the diverse ecological functions that forests provide—beyond just timber supply, they are vital for generating fresh water, oxygen, and supporting agriculture. With approximately 25 million hectares of forest, covering 70% of Japan's land area, the responsible use of forest products significantly bolsters local economies, particularly in forest-rich regions like Shikoku, the smallest of Japan's four major islands. Emphasizing sustainable forestry not only supports construction but also enhances the quality of life for communities.
Hinoki and Sugi as a building material
The Japanese nation has a rich tradition of utilizing and innovating with wood and wood products, akin to other countries blessed with abundant forest resources. Wood, particularly timber, is an accessible material that can be easily crafted into building components with minimal energy consumption. We have extensively developed solid wood and glue-laminated wood products for both interior and exterior applications. Notably, two indigenous coniferous species—Sugi (Japanese cedar, Cryptomeria japonica) and Hinoki (Japanese cypress, Chamaecyparis obtusa)—are sustainably cultivated and harvested locally. This commitment to responsible forestry not only supports our architectural heritage but also promotes environmental stewardship. Through these practices, we honor our cultural legacy while embracing modern advancements in wood technology.
Timber frame:
Our construction employs robust solid timber and glulam columns and beams, utilizing a heavy timber framework. We incorporate cross-laminated timber (CLT) for walls, floors, and roofs, alongside pre-fabricated shear panels, ensuring a streamlined platform construction method that combines strength with efficiency.
interior material：
- Elegant visible framing
- Wall, ceiling, and flooring panels
- J Panel (cross-laminated timber) for exposed structural accents
This combination offers a sophisticated aesthetic while ensuring durability and structural integrity, perfect for modern architectural designs.
Exterior material:
- Charred Japanese cedar for durability
- Weather-resistant painted surfaces
- Elegant, visible frame design
Forestry in Shikoku
Shikoku's forests encompass approximately 70% of the island, mirroring the national average. Consequently, the forestry sector, particularly the woodworking industry, plays a pivotal role in the region's economy, especially in Ehime, Kochi, and Tokushima prefectures.
In Shikoku, natural forests and plantation forests comprise 40% and 60% of the landscape, respectively. The plantations are primarily dominated by Hinoki and Sugi conifers. Notably, the standing wood volume per hectare has consistently risen annually, reflecting a positive trend in both Shikoku and Japan's forestry sector.
Nestled at the base of Shikoku's mountains, our firm is dedicated to responsibly harnessing local resources.
Timber products as a CO2 stock
Wood is renowned for its carbon-neutral qualities, capturing carbon during tree growth and maintaining this storage throughout its lifecycle in buildings. Utilizing timber offers significant environmental benefits within the construction sector. We are committed to playing our part in combating climate change. While our individual efforts may seem modest, when combined with countless others around the globe, they collectively forge a substantial impact for future generations. Together, we can build a sustainable future, one timber project at a time.
