Wood provides us with a sense of tranquility and, with its excellent insulation and humidity control properties, enhances the living environment performance of wooden houses. On the other hand, its performance and strength can deteriorate due to decay and termite damage.
Our Wood Preservation Sales Department utilizes advanced wood preservation technologies to prevent decay and termite damage, providing a wide range of customers with safe, secure, and high-value-added wood. Our unique "dry pressure treatment technology," which uses no water, enables us to treat pre-cut lumber, engineered wood such as laminated veneer lumber (LVL), cross-laminated timber (CLT), and plywood, as well as dimension lumber, with excellent dimensional accuracy. Widely used in residential structural members, moldings, non-residential structures, landscaping materials, and playground equipment, we also accept custom injection treatment to meet the needs of our customers.
Our Divisions and Locations
Our Departments
Wood Preservation Sales Department
Sales Promotion Department
While there are various wood preservation methods such as coating, spraying, dipping, and hot-cold baths, pressure impregnation is the most reliable method for long-term use. Although most pressure impregnation methods use water-soluble chemicals, wood undergoes a dimensional change of approximately 5-10% when it absorbs water. Therefore, many people, especially those familiar with wood, believe that pressure impregnation cannot be applied to engineered wood, particularly CLT and large-section members.
Our Sales Promotion Department is committed to expanding the use of durable wood through collaborations by introducing our unique "dry pressure treatment technology," which does not use any water and can treat large-section members such as laminated veneer lumber (LVL) and cross-laminated timber (CLT) to a wider audience.
Manufacturing Department
We have 4 factories and totally 9 production equipment for preserved wood located in Tohoku, Ibaraki, Kansai, and Okayama, enabling us to fulfill requests from all over Japan.
Our primary Tohoku Factory is equipped with dry, wet, and oil pressure treatment equipment, allowing us to cater to a wide range of needs. The Ibaraki Factory houses a large-scale dry pressure treatment equipment, capable of treating residential and exterior building materials, as well as large-scale non-residential projects such as large-section members and CLT. Our Kansai and Okayama Factories are equipped with dry pressure treatment equipment and can handle residential, exterior, and non-residential projects.
Development Department
Wood has been used in our living environments for a long time and remains an indispensable resource in our daily lives. Making effective use of wood in various situations is also crucial for global environmental conservation. However, wood has drawbacks such as rotting, being eaten by termites, and being flammable. Our Development Department is engaged in research and development to overcome these drawbacks through chemical methods and maximize the potential of wood.
In particular, we are striving to further enhance wood preservation technologies by developing our unique "dry pressure treatment technology" and new wood preservatives. Our goal is to effectively utilize limited forest resources and ensure the long-term usefulness of wood.
(Go to Features of dry pressure treatment page→Features of dry pressure treatment)
Innovation Department
The effective utilization of wood resources is a crucial endeavor not only in Japan but also overseas. In particular, the spread of environmentally friendly wooden buildings in Asia, where termites are active due to the warm and humid climate, is expected to contribute to sustainable growth. In collaboration with domestic businesses involved in wood preservation treatment for residential and non-residential purposes, our Innovation Department is actively working to develop new markets in overseas and DX(Digital Transformation)/GX(Green Transformation) field.
Offices
TOHOKU Factory
Wood Preservation Sales Department, North Japan Sales Section
Manufacturing Department, Tohoku Factory
Established in March 1990
Our company is a major factory of the Wood and Housing Division, equipped with dry, wet, and oil pressure treatment equipments for decay and termite prevention. As a JAS-certified factory, we can also handle in-sizing processing. With our base in Sendai, the city of trees, we have been serving Hokkaido and the six Tohoku prefectures for many years, promoting the use of wood for environmental conservation through our long-cultivated wood preservation technology. In addition to housing materials, we also undertake consignment processing and wood coating. Please feel free to contact us.
Address |
981-3601 |
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TEL |
022-345-4239 |
FAX |
022-345-3192 |
Google Map |
IBARAKI Factory
Manufacturing Department , Ibaraki Factory
Established in October 2020
Ibaraki Factory is a state-of-the-art facility equipped with the world's largest dry pressure-impregnation treatment system for decay and termite prevention, capable of handling large-sized CLT. Taking advantage of its proximity to the Tokyo metropolitan area and six prefectures of Kanto, the plant contributes to the long-term durability of wood for large-scale non-residential buildings primarily in the metropolitan area.
Address |
300-2724 |
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TEL |
0297-43-0021 |
FAX |
0297-42-1300 |
Google Map |
Technical Development Center
Sales Promotion Department, Sales Promotion Section/ Technical Sales Section
Manufacturing Department, Quality Control Section
Development Department, Research and Development Section
Techinical Development Center is a research and development facility for the Wood and Housing Division. There are Sales Promotion Department, Quality Control Section of the Manufacturing Department and the Development Department in the Center. It is engaged in research and development on wood preservation, including our proprietary dry pressure-impregnation treatment for decay and termite prevention, as well as sales of non-residential building materials, support for wood architectural design to promote the use of wood, and quality control using analytical equipment.
Address |
270-0128 |
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TEL |
04-7178-8515 |
FAX |
04-7178-8518 |
Google Map |
Head Office
Wood Preservation Sales Department, East Japan Sales Section
Innovation Department
Based in Tokyo, our head office covers the Kanto, Hokuriku, and Shizuoka regions. By leveraging the strengths of our headquarters, where all departments are concentrated, we are challenging new fields such as the non-residential market, where wood utilization is expanding year by year. Furthermore, the Innovation Department, newly established in 2024 to expand our overseas business, is actively working to develop new markets in overseas and DX/GX field.
Address |
103-0007 |
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TEL |
03-6631-6571 |
FAX |
03-6631-6579 |
Google Map |
KANSAI Factory
Wood Preservation Sales Department, West Japan Sales Section
Manufacturing Department, Kansai Factory
Established in 2001
Our Kansai Factory is a JAS-certified facility equipped with two dry pressure-impregnation wood preservation and anti-termite treatment devices. Primarily processing residential and exterior building materials, the plant has extensive experience in non-residential projects, demonstrating a wide range of expertise.
We contribute to enhancing the durability of wood throughout Western Japan, from Aichi Prefecture to Okinawa. We can flexibly respond to various applications such as housing, non-residential buildings, and exteriors. Please feel free to contact us.
Address |
559-0025 |
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TEL |
06-6686-3281 |
FAX |
06-6686-3282 |
Google Map |
OKAYAMA Factory
Manufacturing Department, Okayama Factory
Established in 2006
Our Okayama Factory is equipped with a dry wood preservation and anti-termite treatment device. Since its opening, the Factory has been producing preserved products such as residential foundation and column materials, primarily using engineered wood. Taking advantage of Okayama Prefecture, where forests cover approximately 70% of the land area, we provide safe and secure AQ-preserved products.
Address |
708-0015 |
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TEL |
0868-28-9115 |
FAX |
0868-28-4566 |
Google Map |