Where does your lumber come from?

Nakamoto Forestry North America lumber products come from privately owned forests in Western Japan that have been sustainably managed for generations. Please visit our sustainability page for certifications and EPDs.

Do you have a showroom where we can view your products?

Our Portland location is configured for manufacturing and remote sales and does not include a customer showroom. We provide support to customers through email and telephone communication and typically send samples via UPS Ground. To receive product samples, please visit our samples page and select a sample kit, or add up to 8 individual product samples to your checkout cart. For inquiries regarding Nakamoto Forestry products, our team is available Monday through Friday, from 6am to 3pm Pacific Time.

What is yakisugi “shou sugi ban”?

Yakisugi is a product, not a burning process. The term refers to a specific type of charred wood exterior siding that has been used as a vernacular building material in Western Japan for hundreds of years. In other parts of the world, yakisugi is sometimes called “shou sugi ban” siding. Traditional yakisugi siding starts with logs of Japanese cedar (known as “sugi” in Japan) that are holistically milled into thin planks. The wood then receives intensive flame-treatment to improve resistance to rot, UV, moisture, fire, insects, and dimensional movement versus untreated wood siding. Yakisugi’s maintenance-optional durability provides exceptional long-term cost performance over its extended natural life cycle. Yakisugi also offers a timeless beauty that is readily adaptable to projects. It has a quintessential wabi-sabi design aesthetic that can be finished in different ways to achieve a broad range of appearances. Learn more about authentic yakisugi.

I’m confused. What is the difference between “yakisugi” and “shou sugi ban”?

The short answer is that there is no difference—they refer to the exact same product. But here’s how we got two competing terms for the same kind of charred Japanese cedar siding. In Japan, the term yakisugi is used exclusively to describe this material, though it is sometimes written as yakisugi-ita. The alternate name shou sugi ban originates from a Westerner’s misreading of yakisugi-ita, where they apparently mixed Japanese and Chinese pronunciations of the ideograms. The word “yaki” in Japanese (meaning burnt or charred) is pronounced “shou” in Chinese. “Sugi” refers to the conifer Cryptomeria japonica—a type of cedar that’s indigenous to Japan. “Ban” is the Chinese reading of the ideogram for board or plank, pronounced “ita” in Japanese. While the term shou sugi ban caught on in the West when the material was introduced in the 1990s, the online keyword yakisugi is appearing more frequently in searches, databases, and media. Read more about yakisugi vs shou sugi ban.

Can we use your products specified for exterior applications indoors, or your products specified for interior applications outdoors? What about on an interior ceiling that will never get touched, or on a soffit or loggia that will never be rained on directly?

For a variety of reasons, we specify whether each of our products can be used indoors, outdoors, or both. The key distinction lies in whether the space will be exposed to direct weather conditions, regardless of whether it has conditioned air. Exterior-only products are not suitable for indoor use, and interior-only products are not suitable for outdoor use. For detailed information, please refer to the individual specification sheets for the Nakamoto Forestry products under consideration for your project.

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Suyaki® Tung Oil Black

Exterior

Tung oil transforms the unbrushed charred surface of our Suyaki® yakisugi “shou sugi ban” into a leathery texture that slows soot layer erosion, extends wood durability, and creates an even black color. This combination is suitable for exterior installations. Yakisugi heat treatment hardens and protects the siding against pests, moisture, and fire. While tung oil slows the weathering process, the siding will still develop its own a unique patina in response to the local climate over time.

SKUs

Profile	Select Grade	Premium Clear Grade
1 x 6 x 12 Shiplap	SA2411	–
1 x 6 x 12 S3S Square Edge	SB2411	–
1 x 8 x 12 Shiplap	SE2411	–
1 x 8 x 12 S3S Square Edge	SF2411	–
1 x 2 x 12 S3S Square Edge	–	SG2411
5/4 x 2-1/2 x 12 S3S Square Edge	–	SH2411
5/4 x 5 x 12 S3S Square Edge	–	SJ2411
5/4 x 8 x 12 S3S Square Edge	SL2411	–

Considerations

Handle with extreme care.
User-friendly material with a leathery surface that will patina slowly over time.
Blemishes and soot erosion will develop over time and are the nature of this very traditional material.
Easy touch up if scratched or scuffed.
Soot residue, caking, and abrasion damage is unavoidable and will cause the soot to blemish, especially along board edges. This is a natural characteristic of this product and can be touched up as required.
To prevent blocking between boards as well as abrasion blemishes, keep boards slip-sheeted until installation.

Patina scale

Patina Scale: 1

Graphic depicting a Patina Scale with a score of 1

The Patina Scale has been developed by Nakamoto Forestry to approximate how its products will weather over time—from 0 (“less patina/more color longevity”) to 10 (“less color longevity/more patina”). However, every product weathers at a different rate due to local conditions, and the Patina Scale is intended as general guidance only, and is solely for informational purposes. Nakamoto Forestry makes no guarantees, representations, or warranties, express or implied, regarding the appearance or color longevity of its products after installation.

Dimensions

*Dimensional shrinkage after manufacture is possible due to being a solid-sawn wood product.

1 x 6 x 12 Shiplap

1 x 6 x 12 S3S Square Edge

1 x 8 x 12 Shiplap

1 x 8 x 12 S3S Square Edge

1 x 2 x 12 S3S Square Edge

5/4 x 2-1/2 x 12 S3S Square Edge

5/4 x 5 x 12 S3S Square Edge

5/4 x 8 x 12 S3S Square Edge

Finish details

Tung Oil Black

Our unique tung oil blend was custom formulated specifically for exterior Suyaki®. This oil stain penetrates into and stabilizes the delicate soot layer, making it easier to handle during installation. The black pigment makes the siding very consistent in tone. The leathery texture will blemish and weather over time, and can easily be touched up.

Prefinish Options

Coated face only

Prefinish Color

Black

Field Cuts

Coat all field cuts and rips with touch up oil

Installation details

For installation instructions

Installation manual available upon request, please contact us for assistance.

Overage

Please add a healthy overage ranging from 15–25%, as shipping additional material can be expensive.

Fastening (Exterior)

Two ring or screw-shank headed face nails or screws per furring strip within 1” of each edge.

Substrate (Exterior)

Rigid furring maximum 16” on-center.

Installation Layout

Vertical or horizontal, all profiles.

Moisture Content

Air dried then kiln dried to 9-13% MC, but may fluctuate during transport or warehousing. Please acclimate on site for two weeks prior to installation.

Species

Cryptomeria japonica, a monotypic genus in the cedar family native to Japan. The Japanese name is "sugi", as in yakisugi and "shou sugi ban". In English it is colloquially called Japanese cedar.

Certifications

Fire Resistance

ASTM E2707 & CSFM 12-7A-1 WUI
ASTM E-84

Sustainability

CFP declaration: Suyaki®

Enivironmental Product Declaration (EPD): Suyaki®

PEFC chain of custody certified PEFC/29-31-385

Resource downloads

Download Rendering Field

Download Product Specs

CSI Guide Specifications

Policies, Terms & Conditions

Exterior

Suyaki® Tung Oil Black