Japanese Cedar (Sugi)
Cryptomeria japonica · Softwood
- Type
- Softwood
- Origin
- Native to Japan and widely cultivated in East Asia and parts of the Azores.
- Hardness
- 320 lbf (Very Soft)
- Durability
- Durable. Known for excellent natural resistance to rot, termites, and weather. Heartwood is high in natural resins that deter insect attack.
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Grain Pattern
Straight but with distinctive, prominent growth rings. The sample shows a flat-sawn cathedral pattern and tight, uniform growth lines typical of mature timber. Medium to coarse texture with a visible luster.
Color & Appearance
Heartwood is typically reddish-brown with dark brown to near-black latewood bands. Sapwood is straw-colored to white. The wood tends to darken over time into a more uniform brownish-tan with sun exposure.
Hardness (Janka)
320 lbf (Very Soft)
Durability & Decay Resistance
Durable. Known for excellent natural resistance to rot, termites, and weather. Heartwood is high in natural resins that deter insect attack.
Value & Sustainability
- Estimated Market Value
- $6.00 - $12.00 per board foot depending on clarity and grade.
- Wood Age Estimate
- Based on the tight growth rings and minor surface oxidation, the sample appears to be from a tree at least 40-50 years old, while the processed timber shows light patina typical of 5-10 years of indoor use or storage.
- Sustainability Status
- Not listed in CITES Appendices or on the IUCN Red List of Threatened Species; widely harvested from managed plantations in Japan.
Common Uses
Traditional Japanese construction, interior paneling, furniture, exterior siding, fencing, roofing shingles, and ship building.
Geographic Origin
Native to Japan and widely cultivated in East Asia and parts of the Azores.
Workability
Easy to work with both hand and machine tools. Responds well to sharp edges but is prone to denting due to low hardness. Glues, stains, and finishes well.
Finish Recommendations
Traditional 'Shou Sugi Ban' (charring) for exterior use. For interior, clear oil or wax is recommended to preserve the natural fragrance and warm color; water-based polyurethanes work well for protection without yellowing.
Notable Features
Distinctive cedar-like spicy scent that persists for years. It is remarkably lightweight yet structurally stable. Low toxicity but dust can be a respiratory irritant.
