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Japanese ashJapanese ash
Japanese ash (Fraxinus mandshurica)

Family: Oleaceae

Common names: Japanese ash, Tamo

Distributed in: Japan (Oceania and S.E. Asia)

Distribution overview: South East Asia and in the mountains of Japan (usually in the river valleys).

Common uses: Cabinetmaking, Decorative veneer, Door, Flooring, Furniture , Paneling , Plywood, Skis, Sporting Goods, Veneer

Product sources: Trees are not easily accessible since they grow on mountainous terrain in Japan. Felled trees are sometimes carried or dragged over rough terrain. Despite this, Japanese ash is regularly exported to the US market, although in small quantities. The attractive Tamo veneer is rare and is priced in the valuable range when available. It is highly favored by furniture designers who like to feature exotic patterns in their work.

Environment profile: Vulnerable throughout its natural growth range

Tree size: Tree height is 20-30 m

Colors: the heart isWhite, YellowThe grain isWavy, the textureFine

Natural durability: Susceptible to attack by fungi and termites, Susceptible to insect attack

Odor: No specific smell or taste

Drying Defects: Distortion

Ease of Drying: Little degrade if dried properly

Blunting Effect: Cuting edges are dulled moderately

Gluing: Good gluing properties

Nailing: Possible if prebored

Planing: Machines well with ordinary tools

Resistance to Impregnation: Sapwood absorbs presevatives well

Response to hand tools: Fairly Difficult to Difficult to Work

Veneering qualities: Selected logs are converted into exceptionally high quality veneers that usually exhibit mottle, fiddleback, swirl, burrs, and the unique peanut patterns

Steam bending: Very good


Polishing: Very Good to Excellent; Staining: Satisfactory staining qualities ; Varnishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,63
Density kg/m3
Bending Strength kg/cm2
Crushing Strength kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Specific Gravity 0.63
Weight 41 34. lbs/ft3

Max. crushing strength = medium
Strength to weight ratio is high, but Japanese ash is low in toughness, compared to European ash. Stiffness is rated as low, while crushing strength and resistance to shock loads are medium. It is heavy.

HMSO. 1981. Handbook of Hardwoods, 2nd Edition. Revised by R.H. Farmer. Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.Kaiser, J.1989. Wood of the Month. Japanese ash: The Tree with a Split Personality. Wood & Wood Products, January 1989. Page 46.Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc. Fresno, California.WCMC. 1992. Conservation Status Listing: Trees and Timbers of the World. World Conservation Monitoring Center (WCMC, Plants Program, 219 Huntingdon Road, Cambridge, CB3 ODL, United Kingdom.
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