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  1. Home
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  3. Common materials
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  6. JAS certification - Stable supply of flat square and non-standard structural materials with a height of 300mm or more.

JAS certification - Stable supply of flat square and non-standard structural materials with a height of 300mm or more.

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last updated:Nov 20, 2025

堤木材
堤木材
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With our timber procurement capabilities, we can stably supply large cross-section and long-length materials that other companies find challenging! We produce high-quality structural materials at our JAS-certified factory.

I want to use square beams with a height of over 300mm in a large-span hall, but I gave up on adoption due to unstable procurement. I am also worried about whether the long materials specified in the drawings can be reliably obtained since the wood shock. Do you have such concerns? Our company resolves this 'procurement anxiety' by consistently handling everything from direct purchasing in the log market to sawing, drying, and processing. Our strengths lie in our unique procurement network and our own JAS-certified factory. This allows us to supply non-standard structural materials, such as square beams over 300mm in height and long materials, in a planned and stable manner, even if they are generally difficult to distribute. In particular, in spatial designs that require large spans, such as common areas in medium-sized wooden buildings like community centers, our 'procurement capability' and 'processing technology' are utilized. We deliver JAS-certified structural materials with guaranteed quality, in the necessary quantities, at the right time.

    Structural Materials
スクリーンショット

JAS certification - Stable supply of flat square and non-standard structural materials with a height of 300mm or more.

スクリーンショット 2025-11-07 11.46.20.png
スクリーンショット 2025-11-07 11.46.20.png
  • Related Link - https://lp.mou-cal.jp/tsutsumi-mokuzai/

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basic information

【Flow until Delivery】 1. Discussion of processing details 2. CAD input 3. Quality check of materials before processing 4. Pre-cut processing 5. Product management based on 3S 6. Product shipment *For more details, please download or feel free to contact us.

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Applications/Examples of results

[Case Study] Medium-sized wooden buildings such as community centers

Detailed information

  • スクリーンショット

    Case study of introduction at a certain children's garden: Using structural lumber of Sugi machine grade classification.

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Tsutsumi Lumber Co., Ltd. Company Profile

Tsutsumi Lumber Co., Ltd. Company Profile

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堤木材

堤木材

Fisheries, Agriculture and Forestry

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Tsutsumi Lumber Co., Ltd. is a company that responds to various orders for square timber, board materials, beam materials, processed boards (flooring and wall boards), and width-glued laminated boards. We can accommodate everything from general residential needs to special materials, and to promptly respond to recent pre-cut projects, we maintain a stock of 500m3 of both dried and undried materials at all times. For dried materials, we use a combination of Yamamoto Vinita's high-frequency equipment and Higuma Drying's steam-type high-temperature dryer to quickly produce products that retain the natural color of the wood.

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