Shochu is Japan's traditional distilled spirit, made from natural ingredients like barley, sweet potato or rice, fermented with kōji mould and then distilled. It belongs in the same family as whisky, vodka and brandy, not sake. Honkaku shōchū, the authentic single-distilled category, is made at under 45% ABV and preserves the character of whatever it is made from.
In this article we look at what shochu actually is, how the two legal categories differ, how it is made from grain or potato through to bottle, what the kōji and the yeast contribute, and how to drink it. The production detail throughout is drawn from a visit to Yanagita Distillery in Miyazaki, one of Japan's leading shochu regions.
What Is Shochu?
Shochu (焼酎) is a traditional Japanese distilled spirit made from natural ingredients such as sweet potato, barley, rice, buckwheat or brown sugar, fermented with kōji mould and distilled. Unlike sake, which is produced by fermentation alone, shochu is both fermented and distilled, which places it alongside whisky, vodka and brandy rather than wine.
Each base ingredient drives its own aromas and flavours, so a single spirit category produces a remarkably wide range of styles. Common bases include sweet potato (imo / 芋), barley (mugi / 麦), rice (kome / 米), buckwheat (soba / 蕎麦) and brown sugar (kokutō / 黒糖).
Under Japanese Liquor Tax Law there are two categories of shochu.
| Category | Japanese | Distillation | Character |
|---|---|---|---|
| Honkaku Shōchū | 本格焼酎 | Single distillation | Expressive; preserves ingredient character |
| Kōrui Shōchū | 甲類焼酎 | Continuous distillation | Neutral; industrial production |
Honkaku Shōchū is the traditional, authentic category: made only from natural ingredients, fermented with kōji, and distilled exactly once at under 45% ABV. The word honkaku means authentic, genuine or traditional, a deliberate statement of craft over commodity. Kōrui Shōchū is produced by continuous distillation and is the lighter, more neutral industrial category.
Miyazaki Prefecture, in the south of Kyushu, is Japan's leading producer and consumer of Honkaku Shōchū.
Source: Yanagita Distillery technical sheet, Miyakonojo, Miyazaki Prefecture.
How Is Shochu Made?
Honkaku Shōchū is made in two fermentation stages. A kōji culture is grown on grain, then built into a yeast starter, then combined with the main base ingredient to ferment into a mash. That mash is distilled exactly once, matured, filtered, and bottled. Single distillation is the defining legal and qualitative feature of the category.
The detail below reflects the process observed at Yanagita Distillery in Miyakonojo, founded in 1902 and the oldest distillery in the city. Specific timings and vessels are Yanagita's own practice and may differ across the wider category.
Stage 1 — Kōji preparation (around 40 hours)
Steamed barley or rice is inoculated with kōji mould and cultivated in the kōji-muro (麹室), a sealed, cedar-lined room with controlled temperature and humidity. The kōji produces the enzymes that convert starch into fermentable sugars. Cultivation takes roughly 40 hours and needs constant attention.
Stage 2 — Shubo, the yeast starter (around 7 days)
Kōji, water and shochu yeast are combined in a tank to grow the yeast starter, or shubo (酒母), literally the "mother of shochu". Over about seven days the yeast multiplies into a vigorous population that seeds the main fermentation.
Stage 3 — Ingredient preparation (sweet potato expressions only)
Sweet potatoes aged for more than 40 days are washed, hand-inspected, trimmed and steamed for around 60 minutes. Correct steaming matters: too firm and fermentation is inefficient, too soft and character is lost. The steamed potato is then crushed and combined with the starter and water.
Stage 4 — Secondary fermentation, niji-moromi (二次もろみ)
The main fermentation. The starter, base ingredient and water ferment in large open-top tanks, around 14 days for barley and 10 days for sweet potato. The mash reaches roughly 14 to 17% alcohol, much higher than a whisky mash at around 8%, because kōji and yeast work together. Honkaku mash generally reaches 15 to 20% alcohol before distillation, a defining trait of the category.
Kaire (櫂入れ) — daily stirring
Throughout fermentation the mash is stirred twice a day with a long wooden paddle, the kaibō (櫂棒). Lifting the settled solids from the bottom equalises temperature and yeast activity across the tank. As the guide at Yanagita put it, fermentation has a kind of "biorhythm", active and quiet by turns, and stirring is an indispensable part of making good shochu.
Stage 5 — Distillation (3 to 4 hours)
The fermented mash is distilled once. There are two methods, and they produce different spirits.
| Method | Japanese | Technique | Character |
|---|---|---|---|
| Atmospheric | 常圧蒸留 Jōatsu Jōryū | Steam injected directly into the mash | Rich body, deep character, robust aromas |
| Vacuum / low-pressure | 減圧蒸留 Gen-atsu Jōryū | Indirect heat under reduced pressure | Lighter body, delicate aromas, smooth finish |
Freshly distilled undiluted spirit, genshu (原酒), typically runs at 38 to 43% ABV. Straight off the still it can be harsh and unbalanced, so maturation follows.
Stage 6 — Maturation
Maturation runs from several months to several years. At Yanagita the main vessel is a porcelain enamel tank, which preserves the spirit's original character while letting texture and aroma soften. Premium expressions are also matured in ex-bourbon casks and Mizunara oak barrels, and traditional ceramic jars (kame / 甕) are still in use.
Stage 7 — Filtration
After maturation the shochu passes once through circular filter sheets to remove insoluble compounds and fine particles. The aim is clarity and balance, not stripping out character. Some expressions are filtered only lightly, by hand, to preserve oils and flavour.
Stage 8 — Adjustment and bottling
Water is added to bring the spirit down from genshu strength to the target bottling ABV, unless it is bottled as genshu. At Yanagita the labels are applied entirely by hand: starch paste made in-house is brushed onto each label and positioned by hand, one bottle at a time.
Source: Yanagita Distillery technical sheet and factory visit, Miyakonojo, Miyazaki Prefecture.
What Is Shochu Made From?
Honkaku Shōchū rests on three things: a base ingredient that supplies the starch, kōji mould that turns that starch into fermentable sugar, and yeast that turns the sugar into alcohol. Water then runs through every stage, from kōji cultivation to the final dilution before bottling.
Kōji (麹), the heart of shochu
Kōji is a mould culture grown on steamed grain. It produces the enzymes, chiefly amylases, that convert the starch in barley or sweet potato into fermentable sugars. Without kōji, starch-rich materials cannot ferment directly. This is the fundamental difference from whisky, where malted barley does the same job.
At Yanagita the main strain is Kawauchi White Kōji (川内白麹), a traditional strain widely used in Honkaku Shōchū. It gives smooth fermentation and a spirit with gentle sweetness and refined aroma. Some sweet potato expressions instead use Black Kōji (黒麹), which produces more citric acid and a richer, more robust character.
Cultivation happens in the kōji-muro, a cedar-lined room. Cedar is traditional because the wood helps regulate moisture. The room holds fixed wooden troughs (kōji-bune / 麹舟) and shallow portable trays (kōji-buta / 麹蓋).
Yeast, the shubo (酒母)
The yeast starter is built before the main fermentation and determines much of the final character. At Yanagita, Kagoshima No.2 yeast is used for barley expressions and Kagoshima No.5 for sweet potato expressions.
Base ingredient
Yanagita's barley expressions use two-row barley, Haruka Nijyo (はるか二条), grown in Kyushu, which serves both as the kōji substrate and the main starch source. The sweet potato expressions use the Beni Haruka (紅はるか) variety from contracted local farmers in Miyakonojo, aged for more than 40 days after harvest so the starches convert to sugar and the sweetness deepens.
Water
Water is used at every stage and its quality shapes the balance and smoothness of the spirit. At Yanagita it is drawn from wells 100 to 150 metres deep, fed by aquifers in the Kirishima mountains and naturally filtered through rock over many years into a soft water well suited to shochu. The same groundwater cools the spirit back to liquid in the distillation condensers.
Source: Yanagita Distillery technical sheet and factory visit, Miyakonojo, Miyazaki Prefecture.
Popular Products
Yoshimura 15-Year Aged Rice Shochu, 720ml
A long-aged rice shochu (kome shōchū) from Yoshimura, matured for fifteen years into a notably smooth, mellow spirit. A good introduction to how time in the cask or tank rounds out a single-distilled shochu. Best enjoyed neat, on the rocks, or with a little water.
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Miyashita Shiso Shochu Highball, 250ml
A ready-to-drink highball built on Miyashita's shochu and the bright, aromatic Japanese herb shiso. A relaxed, lower-effort way into the category, and a clear illustration of why shochu sits so well in a highball serve.
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Health Properties of Shochu
Honkaku Shōchū is described as naturally low in residual sugar and generally lower in calories than many other alcoholic drinks, a consequence of single distillation removing most sugars. This is a producer claim from a promotional technical sheet rather than independent nutritional research, so treat it as a directional point, not settled science. Shochu is an alcoholic spirit and should be enjoyed in moderation.
A Brief History of Shochu
The broader origins of Honkaku Shōchū as a category, and Miyazaki's rise as the leading prefecture, sit outside our current first-hand record, so we won't invent a timeline here. What we can document directly is one distillery's history, which says a good deal about the craft.
Yanagita Distillery was founded in 1902 and is the oldest distillery in Miyakonojo City, with a history spanning more than 120 years. The current president, Tadashi Yanagita, is the fifth generation of the founding family. He brings an engineering background and a focus on refining the distillation equipment for each individual product, with a philosophy of making shochu that faithfully expresses its ingredients, its makers and the terroir of Miyakonojo.
Yanagita's core product names draw on traditional Japanese terms for horse coat colours, a nod to Miyazaki's history as "the land of thoroughbreds": Aokage (青鹿毛, a blue-roan coat), Akakage (赤鹿毛, bay or chestnut), Tochikurige (栃栗毛, dark chestnut) and Koma (駒, a young horse).
Source: Yanagita Distillery technical sheet and factory visit, Miyakonojo, Miyazaki Prefecture.
How to Drink Shochu
Shochu is primarily a drinking spirit, taken straight or with dilution, and the right serve depends on the style. The serving styles below are those recommended across Yanagita's barley range, and they map well onto how UK drinkers already enjoy whisky and gin.
On the rocks suits the fuller and cask-aged expressions and lets the spirit open up slowly. With soda (highball) is bright and easy, and excellent with ice and a twist of lemon. With hot water (oyuwari / お湯割り) is the classic winter serve, softening the spirit and lifting its aromas. Neat works for the more complex cask-matured bottlings. And the more robust, atmospheric-distilled barley expressions take well to cocktails, bringing a toasted grain or sesame note.
For a UK audience used to gin, whisky and highballs, the barley expressions and cask-aged styles are the most accessible way in. Shochu rewards a little curiosity: the same distillery, the same kōji and water, can give you something light and grassy or something deep and chocolatey depending only on the base and the still.
Frequently Asked Questions
What is the difference between shochu and sake?
Sake is brewed by fermentation alone, like a wine or beer, while shochu is fermented and then distilled, like whisky or vodka. That makes shochu a distilled spirit, usually bottled at a higher strength, whereas sake is a brewed beverage. They share the use of kōji mould in fermentation, but they belong to different drinks categories entirely.
What is Honkaku Shōchū?
Honkaku Shōchū (本格焼酎) is the authentic, traditional category of shochu under Japanese Liquor Tax Law. It is made only from natural ingredients, fermented with kōji, and distilled exactly once at under 45% ABV. The word honkaku means authentic or genuine. The alternative category, Kōrui Shōchū, is made by continuous distillation and is lighter and more neutral.
What is shochu made from?
Shochu can be made from a range of natural bases, most commonly sweet potato (imo), barley (mugi), rice (kome), buckwheat (soba) or brown sugar (kokutō). Each base gives the spirit a distinct character. Whatever the base, kōji mould converts its starch into fermentable sugar, and yeast then ferments that sugar before the mash is distilled.
How do you drink shochu?
Shochu is enjoyed straight, on the rocks, diluted with cold water (mizuwari), diluted with hot water (oyuwari), or lengthened with soda as a highball. Lighter, vacuum-distilled styles suit soda and food; fuller, cask-aged styles are good neat or on the rocks. Hot water is the traditional winter serve and lifts the spirit's aromas.
What ABV is shochu?
Honkaku Shōchū is distilled at under 45% ABV by law. Undiluted spirit straight off the still, called genshu, typically runs at 38 to 43% ABV. Most shochu is then diluted with water before bottling to a serving strength of around 20 to 25% ABV, though genshu and cask-strength expressions are bottled stronger.
Where to Buy Shochu in the UK
If you're looking to buy authentic Japanese shochu in the UK, our online store stocks a range of single-distilled and aged expressions, with fast delivery across the UK. Shochu is a distilled spirit, so you'll find it under our spirits range rather than with the fruit sakes.
Technical data sourced from Yanagita Distillery (柳田酒造合名会社), Miyakonojo, Miyazaki Prefecture, Japan. Established 1902. All production and ingredient claims in this article are drawn from Yanagita's technical sheet and a first-hand factory visit, and reflect that distillery's practice. Category-wide claims are limited accordingly.
