Within "JK Group," JK Holdings Co., Ltd. which is listed on the first section of the Tokyo Stock Exchange, is the parent company, and four subsidiary companies, Japan Kenzai, KEYTEC, Timbalam, and BUTSURIN, form the "JK Timber Engineering Group".
Japan Kenzai Co., Ltd.
Wood Structure Construction Business Office
Japan Kenzai offers structural materials including metal joints, proposals for structure design, proposals for construction methods, structure calculations, and estimates, all necessary for construction of wood structures; the company has set up a staff that can give a variety of assistance from material processing to the construction business; in addition, a factory that manufactures structural material is within the JK Group, so Japan Kenzai has prepared a system that can offer the most suitable structural material to its customers.
KEYTEC Co., Ltd.
Consistently working on the manufacturing and sales of plywood since its establishment, KEYTEC soon began manufacturing its main product of structural laminated veneer lumber (LVL, product name: Key-Lam) and was also the first in Japan to manufacture I-joist (product name: Key-Lam Joist) using LVL with a flange; the company is working on the spread of its use. Through the use of domestic material and material gathered from forest thinnings, KEYTEC is aiming to be a company that contributes to the global environment, regional society, and its customers.
BUTSURIN Co., Ltd.
Manufacturer: Okhotsk Wood Pia Cooperative
BUTSURIN, a lumber manufacturing and comprehensive distribution company, conducts sales of domestically and foreign manufactured building materials and of logs and raw material used for building materials; the company mainly conducts work ranging from acquiring forests, purchasing lumber products, conducting sales, and to using these products as a resource to manufacture laminated lumber products at Okhotsk Wood Pia Cooperative and to sell them.
Large and mid-size laminated lumber are manufactured at Okhotsk Wood Pia Cooperative Factory, which is closely affiliated with BUTSURIN, and at Timbalam with a production scale of 600 cubic meters and 1,000 cubic meters per month respectively. Curved laminated lumber is also manufactured. From within that amount, JK Group takes pride in being number one in Japan in terms of the amount of production of large-scale, dimension laminated lumber.
Using larch cut from the forests of Hokkaido as a resource, Okhotsk Wood Pia Cooperative offers strong laminated lumber at a low price.
KEYTEC manufactures LVL with a production scale of 4,000 cubic meters per month, manufactures products with a Young's modulus capable of bending up to 160E, thus meeting the requests for long spans. The special significance of manufacturing LVL is that it plays an extremely valuable role in effectively using material gathered from forest thinnings and small diameter timber, which have a low utility value.
In this manner, JK Timber Engineering Group selects the most suitable construction method for each building structure, and by combining the LVL and laminated lumber, which are manufactured at the group's own factory, the group offers highly reliable, large-scale wood construction. In addition, having acquired the FSC-CoC certification, the group is actively moving ahead with the effective use of domestic lumber by way of legal logging.
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