コシイプレザービング List of Products and Services

"Lugwood" is a wooden exterior designed with the concept of "creating a comfortable lifestyle by integrating gardens and houses." The wood used for the exterior comes with a 10-year warranty. We have developed rot-resistant wood so that you can enjoy the natural beauty of wood for a long time. Therefore, it is fine to leave it outside. Additionally, we offer a special paint called "LugWEAR." It is easy to apply and enhances the wood grain finish. **Lugwood Features** - The wood used for the exterior comes with a 10-year warranty (only for parts painted with LugWEAR) - 100% wood sourced from Japanese mountains - It is fine to leave it outside - The main ingredients of the chemicals are the same as those found in everyday life *For more details, please refer to the PDF document or feel free to contact us.*

• Exterior Materials

"Lugwood" is a wooden exterior designed with the concept of "creating a comfortable lifestyle by integrating gardens and houses." The wood used for the exterior comes with a 10-year warranty. We have developed rot-resistant wood so that you can enjoy the natural beauty of wood for a long time. Therefore, it is fine to leave it outside. Additionally, we offer a special paint called "LugWEAR." It is easy to apply and enhances the wood grain finish. 【Lugwood Features】 ■ The wood used for the exterior comes with a 10-year warranty (only for parts painted with LugWEAR) ■ 100% of the wood is sourced from Japanese mountains ■ It is fine to leave it outside ■ The main ingredients of the chemicals are the same as those commonly found in daily life *For more details, please refer to the PDF materials or feel free to contact us.

• Exterior Materials

"Lugwood" is a wooden exterior designed with the concept of "creating a comfortable lifestyle by integrating gardens and houses." The wood used for the exterior comes with a 10-year warranty. We have developed rot-resistant wood so that you can enjoy the natural beauty of wood for a long time. Therefore, it is fine to leave it outside. Additionally, we offer a special paint called "LugWEAR." It is easy to apply and enhances the wood grain finish. **Lugwood Features** - The wood used for the exterior comes with a 10-year warranty (only for parts coated with LugWEAR) - 100% of the wood is sourced from Japanese mountains - It is fine to leave it outside - The main components of the chemicals are the same as those found in everyday life *For more details, please refer to the PDF document or feel free to contact us.*

• Exterior Materials

"Lugwood" is a wooden exterior designed with the concept of "creating a comfortable lifestyle through integrated design of gardens and homes." The wood used for the exterior comes with a 10-year warranty. We have developed rot-resistant wood so that you can enjoy the natural beauty of wood for a long time. Therefore, it is fine to leave it outside. Additionally, we offer a special paint called "LugWEAR." It is easy to apply and enhances the wood grain finish. 【Lugwood Features】 ■ The wood used for the exterior comes with a 10-year warranty (only for parts painted with LugWEAR) ■ 100% of the wood is sourced from Japanese mountains ■ It is fine to leave it outside ■ The main ingredients of the chemicals are the same as those found in everyday life *For more details, please refer to the PDF document or feel free to contact us.

• Exterior Materials

The high-durability "wooden school barn-style earth retaining structure" promotes the use of wood by transitioning from traditional concrete and steel structures to wooden ones, contributing to the global environment. By deeply impregnating wood with preservatives, we have achieved long-term durability comparable to that of concrete and steel retaining walls. The estimated lifespan based on decay test results is over 50 years. Demonstration experiments and structural calculations have proven that the strength of the components and the resistance of the joints are sufficient, confirming that it functions as a unified structure without issues. Stability calculations for gravity structures consider stability against overturning, sliding, and ground support. The assembly construction does not require skilled labor due to pre-cut components made in the factory. It is suitable for construction sites where material delivery is difficult. It is featured in the "Essential Guide for Mountain Forest Roads (Estimation and Construction Edition)." **Features** - Stability: A structure based on stability calculations and structural calculations as a gravity structure. - Durability: Meets the "quality, performance, and durability" required for civil engineering structures. - Economic efficiency: Comparable to gravity concrete. - Speed: Excellent workability allows for shortened construction periods. - Environmental consideration: Promotes the use of wood and takes landscape into account. *For more details, please visit our website or PDF materials, or feel free to contact us.*

• Civil Engineering Method
• Other civil engineering works
• wood

The "High Durability Wooden Frame" promotes the use of wood and contributes to the global environment by transitioning from traditional frame construction to wooden frame construction. By deeply impregnating wood preservatives, we have achieved long-term durability equivalent to or greater than that of futon baskets and basket frames. The estimated service life based on decay test results is over 50 years. No assembly is required on-site; you simply need to install the product. It stands independently, making it easy to fill with infill materials and excellent in terms of workability. When using stone materials for infill, it offers excellent permeability, and when using site-generated soil, it reduces the need for waste disposal and allows for potential vegetation growth. 【Features】 ■ Achieves long-term durability equivalent to or greater than futon baskets and basket frames ■ Simplified process with only installation, making construction easier and shortening the construction period ■ Infill materials can include site-generated soil or stone materials ■ Contributes to the environment and considers landscape through wood utilization *For more details, please visit our company website or PDF materials, or feel free to contact us.

• Civil Engineering Method
• Other civil engineering works
• wood

The high-durability "Wooden Schoolhouse-style Erosion Control Dam" promotes the use of wood by transitioning from traditional concrete and steel dams to wooden dams, contributing to the global environment. By deeply impregnating wood with preservatives, we have achieved long-term durability comparable to that of concrete and steel dams. The estimated lifespan based on decay test results is over 50 years. Demonstration experiments and structural calculations have proven that the strength of the components and the resistance of the joints are sufficient, confirming that it functions as a unified structure without issues. Stability calculations for gravity structures examine stability against overturning, sliding, and ground support. The assembly construction does not require skilled labor, as it uses pre-cut components manufactured in a factory. It is featured in the "Essential Guide for Erosion Control Forest Roads (Estimation and Construction Edition)." **Features** - **Stability:** A structure based on stability calculations and structural calculations as a gravity structure. - **Durability:** Meets the "quality, performance, and durability" required for civil engineering structures. - **Economy:** Comparable to gravity concrete. - **Speed:** Excellent workability allows for shortened construction periods. - **Environmental Consideration:** Promotes the use of wood and takes landscape into account. *For more details, please visit our website or refer to the PDF materials, or feel free to contact us.*

• Civil Engineering Method
• Other civil engineering works
• wood

The high-durability "wooden school barn-style revetment" promotes the use of wood by transitioning from traditional concrete and steel revetments to wooden ones, contributing to the global environment. By deeply impregnating wood with preservatives, we have achieved long-term durability comparable to that of concrete and steel revetments. The estimated lifespan based on decay test results is over 50 years. Through demonstration experiments and structural calculations, we have proven that the strength of the components and the resistance of the joints are sufficient, confirming that it functions as a cohesive structure without issues. In the stability calculations for gravity structures, we examine stability against overturning, sliding, and ground support. The assembly construction does not require skilled labor due to precut components made in the factory. It is suitable for construction sites where material delivery is difficult. The basic structure is similar to that of wooden school barn-style earth retaining structures. 【Features】 ■ Stability: A structure based on stability calculations and structural calculations as a gravity structure. ■ Durability: Meets the "quality, performance, and durability" required for civil engineering structures. ■ Economic efficiency: Comparable to gravity concrete. ■ Rapid construction: Excellent workability allows for shortened construction periods. ■ Environmental consideration: Promotes the use of wood and takes landscape into account. *For more details, please visit our website or PDF materials, or feel free to contact us.

• Civil Engineering Method
• Other civil engineering works
• wood

"The drop-in type high-durability wooden residual formwork construction" achieves long-term durability through unique wood preservation technology! It promotes the use of wood and contributes to the global environment. The estimated lifespan based on decay test results is over 50 years. Conventional wooden residual formwork poses risks due to deterioration affecting aesthetics and the potential for formwork components to fall off, making its use common on the upstream side. Our products enable use on the downstream side due to their high durability. Maintenance and inspection work to prepare for decay or the detachment of formwork components are unnecessary. There is no need for scaffolding during formwork assembly (installation of a catwalk for pouring). The elimination of formwork and scaffolding removal, as well as concrete surface finishing, leads to a reduction in construction time. Assembly can be done by ordinary workers without the need for formwork carpenters. [Features] ■ The surface finish of the structure has a wooden texture, considering aesthetics. ■ Conservation of the surrounding environment is achieved. ■ The removal of formwork and concrete surface finishing is unnecessary, and scaffolding for those tasks is also not required, resulting in a shortened construction period. ■ Direct sunlight reflection can be prevented. *For more details, please refer to the PDF materials or feel free to contact us.

• wood
• Other woodworking

"The drop-in type high-durability wooden residual formwork construction" achieves long-term durability through unique wood preservation technology! It promotes the use of wood and contributes to the global environment. The estimated lifespan based on decay test results is over 50 years. The risk of aesthetic deterioration due to decay, as seen with conventional wooden residual formwork, and the danger of formwork components falling off are extremely low, eliminating the need for maintenance and inspection work. It can be used for the formwork of retaining walls to prevent disasters in areas at risk of landslides on steep slopes. The wooden surface reduces sunlight reflection more than concrete. There is no need for scaffolding during formwork assembly (installation of a catwalk for pouring). The elimination of formwork and scaffolding removal, as well as concrete surface finishing, allows for a shortened construction period. It can be assembled by ordinary workers without the need for specialized formwork carpenters. 【Features】 ■ The surface finish of the structure is wood-based, considering aesthetics. ■ Conservation of the surrounding environment is achieved. ■ The removal of formwork and concrete surface finishing is unnecessary, and since scaffolding for those tasks is also not needed, the construction period can be shortened. ■ Direct sunlight reflection can be prevented. *For more details, please refer to the PDF document or feel free to contact us.

• wood
• Other woodworking

The "Wooden Storage-style Stair Construction" improves workability during installation compared to traditional log stair construction, achieving long-term durability. It reduces maintenance frequency and lowers lifecycle costs. Additionally, it excels over artificial wood in terms of aesthetics and wood utilization. By deeply impregnating wood with anti-decay agents, long-term durability has been achieved. The estimated lifespan based on decay test results is over 50 years. This is a frame-style stair construction assembled with horizontal and vertical materials in a lattice pattern, allowing the use of site-generated soil, stone, chips, etc., in the tread area. Since it is a frame construction method, piling is unnecessary. Because of the frame construction method, soil and gravel in the tread area do not wash away during rain. By adjusting the tread surface, it can accommodate various slopes. The riser can be raised by adding soil to heights of 160 to 210 mm, and the tread surface can be adjusted from 200 to 500 mm. 【Features】 ■ No piling work required like traditional log stair construction ■ Easy installation by simply placing pre-assembled products on site ■ Tread surface can be adjusted by sliding the upper frame ■ Can be adapted to the slope of the stairs ■ The frame construction method prevents runoff from the tread area *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Method
• Other woodworking
• wood

By replacing concrete with wood, the transition to wooden materials protects the environment, preserves forests, creates new demand, and realizes "local production for local consumption." The "pressure-injected treated wood," developed for effective utilization of wood, is adopted in public civil engineering projects such as small dams and park facilities due to its strength and high workability. Using wood instead of concrete protects the Earth and preserves the landscape. 【Features】 ■ Stability: Structural body based on stability calculations and structural calculations ■ Durability: Meets the quality, performance, and durability required for civil engineering structures ■ Economic efficiency: Comparable to conventional concrete and steel structures ■ Workability: Excellent workability allows for shortened construction periods ■ Local production for local consumption: Utilizes domestically sourced thinned wood *For more details, please refer to the PDF materials or feel free to contact us.

• Wood deck (synthetic wood/resin)
• Dam construction
• Other park materials

At Koshii Preserving Co., Ltd., we are developing "high durability treated wood" using the "O&D Wood Treatment System," which is the key to effective utilization of thinning wood, driven by our desire to make various uses of thinning wood possible. By applying preservation treatment to the wood, we enhance its durability. The excellent effect is estimated to provide durability of over 30 years. 【Features】 ■ Estimated durability of over 30 years ■ 10-year warranty ■ Safety confirmed for aquatic organisms ■ Usable for a wide range of applications ■ Contributes to the preservation of the global environment *For more details, please download the PDF or feel free to contact us.

• wood

Wood has an image of rotting, which is why civil engineering materials such as concrete and steel are commonly used. However, our company has successfully transformed wood into a civil engineering material through high durability. O&D Wood has a proven track record as an environmental material in civil engineering for over 30 years, enabling its use as a highly durable civil engineering material. As a result of repeated testing under harsh conditions, we have demonstrated the long-term durability of Mytrek ACQ (anti-corrosion and anti-termite effects). 【Features】 ■ Over 30 years of high durability ■ Usable as a civil engineering material ■ Proven long-term durability of Mytrek ACQ (anti-corrosion and anti-termite effects) ■ No damage even after 29 years *For more details, please refer to the PDF document or feel free to contact us.

• wood
• Wood processing

We have introduced a new technology that involves pressurizing and injecting wood preservatives into compressed wood. Each piece of wood that makes up the structure becomes a high-quality material with excellent uniformity and minimal variation. By compressing the wood, it has become possible to sufficiently penetrate wood preservatives into wood with a moisture content exceeding 70%. 【Comparison of Penetration of Preservatives】 ■ Pressurized injection treatment only: Moisture content 33%, Heartwood ratio 65%, Compression ratio 0% ■ Compressed processing treatment + Pressurized injection treatment: Moisture content 79%, Heartwood ratio 60%, Compression ratio 20% *For more details, please refer to the PDF document or feel free to contact us.

• Wood deck (synthetic wood/resin)
• Wood processing
• wood

The preservative used for "O&D Wood" is treated with pressure injection using "Mytrek ACQ." "Mytrek ACQ" is an excellent preservative and anti-termite treatment agent that complies with the wood preservative standards set by JIS (Japanese Industrial Standards). Based on numerous safety documentation, it has been demonstrated that even under harsh conditions, the chemical components adhere to the wood and do not contaminate the surrounding environment. 【Features】 ■ Excellent preservative and anti-termite treatment agent that complies with the wood preservative standards set by JIS (Japanese Industrial Standards) ■ Chemical components adhere to the wood even under harsh conditions ■ It has been clarified that it does not contaminate the surrounding environment *For more details, please refer to the PDF document or feel free to contact us.

• Environmental Survey
• Geological Survey

We would like to introduce our contributions to the environment for CO2 reduction. What is required in the civil engineering field to prevent global warming is construction methods that generate low CO2 emissions and have high durability. The structures made from "O&D Wood" can be considered an excellent method that contributes to environmental conservation, as they emit less CO2 compared to concrete of the same scale. [Features] ■ Reduction of CO2 emissions during manufacturing ■ High-durability wood prevents CO2 release into the atmosphere for an extended period ■ Utilization of thinned wood contributes to CO2 absorption *For more details, please refer to the PDF document or feel free to contact us.

• wood
• Wood processing

We would like to introduce our contributions to the environment for the ecosystem. Wooden storehouse structures made from "O&D Wood" are used in various locations where diverse living organisms thrive, such as hillside retaining works, soil conservation dams, and riverbank protection works. As part of the environmental impact assessment of "O&D Wood," we conducted a year-long study to examine the differences in the creation of habitats for living organisms and biodiversity conservation between wooden storehouse structures and civil engineering structures made of steel or concrete. The results of the study showed that wooden storehouse structures provide a more favorable environment for living organisms to grow and inhabit compared to other structures (steel and concrete). *For more details, please refer to the PDF document or feel free to contact us.

• wood
• Environmental Survey