Mizunara (Japanese oak)

Overview

Mizunara is the Japanese name for an Asian oak that botanists treat either as Quercus crispula or as Quercus mongolica var. crispula. Wikipedia says some authorities consider Q. crispula a variety of Q. mongolica, and this file covers both under "Japanese oak", the name Wood Database uses for Q. mongolica. The wood is light to medium brown with an olive cast. Wikipedia singles it out as the oak for whisky casks, and it is also used for furniture. Pick it where you want a white-oak-like wood of Asian origin.

Pros

• Wood Database estimates Janka at 1,200 lbf (an estimate from specific gravity) at about 680 kg/m3, so it sits in the usual oak hardness range.
• Wood Database says it steam-bends and is used for tight cooperage, veneer and furniture.
• Highly regarded in Japan: Wikipedia calls the wood highly valued for whisky and furniture.
• Reported use for furniture and veneer means it can be treated as a general oak substitute.

Cons

• The Janka figure is an estimate, not a measurement, so treat it as indicative.
• Wood Database notes a larger proportion of pale sapwood, which cuts yield of uniform heartwood.
• Reacts with iron like other oaks; use brass or stainless fixings.
• Hard to source in the US, and there is a CITES paperwork angle (below).
• No US price I could verify.

Variants and subspecies

• Quercus mongolica (Mongolian or Japanese oak), the species Wood Database profiles.
• Q. crispula / Q. mongolica var. crispula, mizunara proper, the Japanese form.
• The wood is similar in use to the American white oak group (see White oak) and to European oak, but I found no side-by-side data, so do not assume identical properties.

Working and finishing

Wood Database reports that it can be steam-bent. As an oak of about 680 kg/m3 it should be worked like other medium-hard oaks, with sharp tools and pilot holes for screws, but I found no species-specific machining tests. Oak and iron react, so avoid steel wool and keep ferrous fixings away from damp wood.

Staining and finishing colour

Wood Database reports the heartwood as light to medium brown with an olive cast and flags the reaction with iron. I found no stain tests for mizunara. If you stain, expect behaviour like other oaks and test on offcuts; ferrous contamination will leave dark marks.

Sustainability and handling

On 2026-09-30 the Species+ database lists Quercus mongolica in CITES Appendix III, a listing by the Russian Federation effective 24 June 2014 (CoP16 annotation #5), covering logs, sawn wood and veneer sheets. Wood Database also notes the Appendix III listing. Species+ did not return a separate entry for Q. crispula, and I could not confirm whether a Japanese-origin mizunara board falls under the Russian listing: ask a dealer for origin and, for Russian material, a CITES document. The Lacey Act bars US trade in plants taken in violation of law (timber since 2008), and EU buyers face the deforestation regulation for wood and furniture from 30 December 2026 for large and medium operators. I found no species-specific toxicity entry for this oak, so treat the dust as an irritant, as for any hardwood, and extract it.

Popular projects

Whisky casks (the reason mizunara is famous), tight cooperage, veneer, furniture and flooring. For a workshop, think tables, chairs and cabinets that you would otherwise build from white or red oak.

Buying notes

Mostly met as Japanese or Russian-origin lumber and veneer. Ask for the Latin name, the country of harvest and any CITES paperwork. Since the Janka value is an estimate, test hardness on a sample if it matters.