MIZUNARA WORKS
Authentic Mizunara Barrels, Nurtured by Hokkaido
Premium oak casks crafted from Hokkaido-grown Mizunara timber by master coopers
We supply high-quality Mizunara barrels to distilleries, brand owners, collectors, and OEM partners
What Is Mizunara?
Mizunara is a species of oak native to Japan, found only in the cold mountain regions of Hokkaido and similar climates.
Raw Materials
Every log used by Mizunara Works is hand-selected from the virgin forests of Hokkaido.
Custom Orders
When you use an off-the-shelf cask, flavor is something given to you. With Mizunara Works, flavor becomes something you design.
Charring Technology
Charring is not merely a manufacturing step — it is the decisive process that determines the flavor architecture of your spirit.
Manufacturing Facility
Where traditional coopering craft meets modern precision.
It takes both the master craftsperson's hand and the accuracy of precision machinery to produce a truly authentic Mizunara cask.
The Inconvenient Truth About the Mizunara Cask Industry
Mizunara is a species of oak native to Japan, growing only in the cold mountain regions of Hokkaido and the Tohoku area. It grows extremely slowly — taking more than 100 years to reach maturity for use as cask timber — and its rarity has earned it high regard from distilleries and collectors around the world.Spirits aged in Mizunara casks develop an oriental fragrance reminiscent of sandalwood and aloeswood, along with sweet notes of coconut and vanilla. These distinctive flavor characteristics are difficult to replicate with any other oak species, making Mizunara the iconic maturation cask of Japanese whisky.
Yet the number of craftspeople in Japan capable of making Mizunara casks is declining year by year. Production takes months, most existing suppliers cannot accommodate customization, and reliable supply is difficult. New casks available on the market are extremely limited — and this scarcity is only growing.Mizunara Works was built to solve exactly this. Using only carefully selected Hokkaido Mizunara timber, we deliver authentic Mizunara casks to the world.
The Advantage of Hokkaido Mizunara Timber
Every log used by Mizunara Works is hand-selected from the virgin forests of Hokkaido. Timber nurtured over decades in Hokkaido's extreme cold develops a dense grain and high eudesmol content, delivering quality unattainable from any other region. Each log comes with a certificate of origin.
Among the "Mizunara casks" circulating on the market, some use Mizunara only for the heads (end pieces), while the staves (body) are made from ordinary white oak. It is impossible to draw out Mizunara's true flavor characteristics from such mixed-material casks. We refuse to follow that industry shortcut.
At Mizunara Works, every component — staves and heads alike — is made from 100% Hokkaido Mizunara timber. We make absolutely no compromise on materials.
We Engineer Your Flavor
Mizunara Works offers advanced OEM production tailored to your maturation goals and brand concept. Every specification below can be fully customized to order.
✦ Char level: Light / Medium / Heavy / Alligator (the process that most directly determines your flavor profile)✦ Cask size: Full range from 5L to 300L✦ Stave thickness: 2cm–3.3cm (selected according to maturation period and flavor goals)✦ Hoop material and color: Iron or stainless steel, choice of multiple colors✦ Logo engraving: Precision laser engraving — fully custom design when artwork files are provided
Charring Is the Blueprint of Flavor
Charring — burning the interior of the cask with flame — determines the type and quantity of flavor compounds that dissolve into the spirit during maturation. Heat converts cellulose, hemicellulose, and lignin into vanillin, furfural, and oak lactone, forming the structural backbone of the spirit's flavor.
Light Char
The thinnest char layer, preserving Mizunara's native eudesmol, aloeswood, and floral notes to the fullest. Ideal for showcasing the signature Mizunara character, or for short-term maturation programs.
Medium Char
The industry-standard level, balancing vanillin, caramelization, and light smoke. Low risk, highly versatile. When in doubt, this is the right place to start.
Heavy Char
A thick char layer actively filters excess tannins and off-notes while imparting dark chocolate, dried fruit, and deep smoke. Best suited for long-term maturation and full-body flavor programs.
Alligator Char
The most intense char level — fired so deeply the inner wall cracks like alligator hide. Espresso, bitter chocolate, and fierce smoke dominate a truly one-of-a-kind flavor profile. The choice for releases that use rarity and conversation as their edge.
All four char levels are available to order. For your preferred char level, cask size, or any other specification, please don't hesitate to get in touch.
Where Artisan Craft Meets Modern Precision
Coopering Mizunara timber is significantly more difficult than working with other oak species. The wood is hard, its grain complex, and in the hands of less experienced craftspeople, yield rates suffer. This is precisely why so few facilities in Japan are capable of producing Mizunara casks.Our partner facility employs craftspeople who have specialized in Mizunara cask production for decades. From wood selection and assembly through charring, leak testing, and final inspection, every stage is completed under independent quality checks. The CNC stave machines and precision char furnaces exist only to guarantee a floor of accuracy. The final judgment always rests with the eye and hand of the craftsperson.
From incoming log inspection through drying, wood selection, assembly, charring, leak testing, and final inspection — each stage operates under its own independent quality check. We separate every process and maintain strict vigilance so that not a single defective piece of timber ever makes it through.
Our products are currently exported to markets including Mexico, India, and Taiwan, and have earned high praise from numerous distilleries and collectors. We're ready to bring that same quality to your project. Get in touch.
Premium oak casks made from 100% Hokkaido Mizunara timber. Available from 5L to 300L, suitable for everything from spirit maturation to display use.
【Product Features】
✓ 100% Hokkaido Mizunara timber✓ Certificate of origin included✓ No adhesives used✓ Rigorous airtightness testing✓ OEM and custom orders accepted✓ Char level selection✓ Cask size options✓ Stave thickness options✓ Hoop color selection✓ Logo engraving
For your preferred specifications, please don't hesitate to contact us.
| Company name | Mizunara Works |
| Official website | https://mizunaraworks.com |
| CEO | WANG LEI |
| Address | 5-8 Nishimachi, Nakafurano, Sorachi District, Hokkaido, Japan |
| Business hours | 10:00–18:00 (Monday–Friday, excluding public holidays) |
| Pricing | Please enquire |
| Payment method and timing | Please enquire |
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