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Japanese oakJapanese oak
Japanese oak (Quercus mongolica)

Family: Fagaceae

Common names: Japanese oak, Ohnara

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

Distribution overview: Native to Japan, and occurs on both the North Island (Hokkaido) and the Main Island (Honshu).

Common uses: Boat building, Cabinetmaking, Charcoal, Construction, Decorative veneer, Flooring, Furniture , Interior construction, Joinery, Paneling , Plywood, Veneer

Product sources: Some Japanese oak is imported into the United Kingdom from Japan. Imported material are generally of good quality and are uniform in properties since they are produced from slow, even-growth trees.

Environment profile: Status has not been officially assessed

Tree size: Trees on the North Island of Japan are reported to grow more slowly and evenly, and produce better quality timber

Colors: the heart isPink, Redand the sapwoodBrown - pale , Clearly differentiated from the heartwood.The grain isTypically straight , the textureTypically coarse

Natural durability: Non-durable, Perishable

Odor: No specific smell or taste

Kiln Schedules: UK=C

Ease of Drying: Dries slowly with little degrade

Blunting Effect: Slight bluting effect on cutting tools

Gluing: Good properties

Nailing: Good nailing properties

Planing: Japanese oak, considered to be in the White oak group, is much easier than other White oaks to machine in most operations since it is milder and less dense

Resistance to Impregnation: The sapwood is readily penetrated by chemical preservatives.

Response to hand tools: Easy to Work

Veneering qualities: The timber is rotary peeled for plywood manufacture, and sliced for decorative veneers

Steam bending: Very good

Screwing: Good screwing properties ; Turning: Poor to Very Poor Results

Polishing: Excellent; Staining: Stains very well ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,64
Density 673 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
Density 42 lbs/ft3
Specific Gravity 0.64
Weight 39 32. lbs/ft3

Low stiffness
Low resistance to shock
Crushing strength = medium
Bending strength (MOR) = medium
The wood is somewhat weaker than European oak, and in general weighs less than other oaks on the commercial market. Timber from the North Island of Japan (Hokkaido) is more uniform in structure and is milder than timber from the Main Island (Honshu). Trees on the North Island are reported to grow more slowly and evenly.

Boone, R.S., C.J. Kozlik, P.J. Bois and E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Woods: Temperate and Tropical. United States Department of Agriculture, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.Constantine, Jr. A.J. 1975. Know your Woods - A Complete Guide to Trees, Woods, and Veneers. Revised Edition, Revised by Harry J. Hobbs.Charles Scribner and Sons, New York.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.Jackson, A. and D. Day. 1992. Good Wood Handbook - The Wood worker's Guide to Identifying, Selecting and Using the Right Wood. HarperCollins Publishers, London.Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc. Fresno, California.Wallis, N.K. 1956. Australian Timber Handbook. Sponsored by The Timber Development Association of Australia. Angus & Robertson, Ltd., 89 Castlereagh Street, Sydney, Australia.
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