Sake, the drink Japan is best known for, is a brewed alcoholic drink made from fermented rice, water, koji, and yeast. Often called Japanese rice wine outside the country, it is neither made like grape wine nor served in just one way: the same drink may be crisp at 8°C, rounded at room temperature, or grainy and full at 50°C.
What sake means in Japan
Sake is Japan’s national drink, but the vocabulary can surprise visitors. In Japanese, sake (酒) can mean any alcoholic beverage. The rice-based drink commonly called sake in English is more precisely nihonshu (日本酒), literally Japanese alcohol. Ordering nihonshu makes the distinction clear when beer, whisky, or other drinks are also on the menu.
The practice of fermenting rice into alcohol reached Japan with rice cultivation about 2,500 years ago. Its first written record in Japan dates to the third century CE. Sake also has ceremonial roles: it is offered as o-miki in Shinto ceremonies, and wooden casks are opened with mallets at kagami-biraki celebrations.
A sake brewery is called a kura or shuzō. Japan has about 1,800 breweries, with Niigata, Kobe, and Kyoto among the better-known brewing areas. A cedar-branch ball called a sugitama may hang outside a kura when new sake has been brewed; its leaves turn yellow as the sake matures.
How brewers turn rice into sake
Sake is not simply rice wine. Grape wine begins with sugar already present in fruit, while beer relies on malted grain. Sake uses parallel double fermentation: koji converts rice starch into sugar at the same time that yeast converts that sugar into alcohol. Because yeast is not confronted with all the sugar at once, this process can reach a higher alcohol level than beer.
The work begins with rice polishing. A polishing run can last up to 10 hours. The rice is then washed, soaked, and steamed. Soaking is a precise step: rice polished to 50% for Daiginjo may soak for only minutes, while rice at 70% for Junmai can soak overnight.
- Make koji. Brewers sprinkle a portion of steamed rice with koji and incubate it for 48 hours at about 30–32°C and 40% humidity.
- Build the shubo. This yeast starter ferments in a small tank for up to two weeks before joining the main mash.
- Grow the moromi. Rice, koji, water, and starter are added in three portions over several days, a method called sandan jikomi. The staged additions help prevent unwanted bacteria and build complexity.
- Separate and finish. After fermentation, a hydraulic Yabuta press separates the liquid from the rice solids. Sake is filtered, typically pasteurized at 60–65°C (140–150°F), then commonly aged for three to six months before bottling.
Pasteurization is not a recent idea in this tradition. It was documented for sake in Japan in 1569, almost 300 years before Louis Pasteur’s work. Today, sake is usually stored in stainless steel or glass; earlier cedar casks could contribute tannins to the drink.
Read the rice polishing ratio before judging the bottle
The rice polishing ratio, or seimai-buai, states how much of the grain remains after milling. It does not state how much has been removed. A label showing 60% means that 60% of each grain remains and 40% was polished away. Lower remaining percentages remove more protein and fat from the outer layers, often producing a finer, fruitier result.
More polishing does not automatically make a sake better for every taste. It does mean that more rice is needed for the same amount of sake, which can sharply increase cost. One newer Satake rice mill can target the mineral-rich lengthwise axis of a grain and achieve flavor associated with 40% remaining rice while leaving 60% remaining.
Use Junmai, Ginjo, and Daiginjo as useful starting points
Two broad groups appear in sake classification. Futsū-shu is table sake and represented about 57% of production in 2020. Tokutei meishō-shu is quality-certified sake. Within the latter group, label terms tell a reader about ingredients, polishing, and brewing approach rather than providing a universal ranking.
| Style | What the label guarantees | What to expect |
|---|---|---|
| Junmai | Rice, water, koji, and yeast only; no added distilled alcohol and no minimum polishing ratio. | A pure-rice designation, not a promise of one fixed flavor or polish level. |
| Ginjo | At least 60% of the rice grain remains after polishing. | Cool fermentation produces fruit and floral aromas. |
| Daiginjo | At least 50% of the rice grain remains after polishing. | A still finer, more aromatic style than Ginjo. |
When Ginjo or Daiginjo does not carry the word Junmai, a small amount of distilled alcohol may be used to extract aromas. That is a permitted stylistic choice, not proof that a bottle is inferior. Ginjo styles became possible in the 1980s with yeast strains that produce fruity esters.
Another number on a label may be nihonshu-do, also called the Sake Meter Value. It measures a density difference from water and signals the balance of sweetness and dryness. On a typical scale, about −3 is sweet and about +10 is dry; the full range can extend beyond those points.
Koji supplies the sugars that rice cannot
Koji is the yellow mold Aspergillus oryzae, named Japan’s national fungus in 2006. It is safe for people and, unlike the toxic Aspergillus flavus, does not produce aflatoxin. On steamed rice, koji releases more than 50 enzymes.
Those enzymes explain why sake can begin with starchy rice rather than a sugary juice. Amylases turn starch into fermentable sugar, while proteases turn proteins into amino acids associated with umami. For scale, one gram of pure amylase can convert two kilograms of starch to sugar in one hour at 50°C. In a kura, that enzymatic work happens alongside yeast fermentation rather than as a separate, finished stage.
Choose chilled, room-temperature, or warm sake on purpose
There is no single correct serving temperature. Chilled sake is served at 8–15°C and tends to show a light, crisp body and fruity aroma. Room-temperature sake falls between 15 and 25°C. Warm sake is served at 40–50°C, where it can reveal fuller grain aromas with lower viscosity.
Ginjo and Daiginjo are usually served chilled so their fine aromas are not lost. A fuller style may be more rewarding warm. For a home experiment, warm sake in a hot-water bath for about one minute or in a microwave for about 45–60 seconds, then check that it has not gone beyond the 40–50°C range. Temperature changes the presentation; it is not a shortcut for hiding poor sake.
Pour sake with attention to the people at the table
Japanese sake etiquette treats pouring as a shared act. Traditionally, people do not pour for themselves, a practice called tejaku. Instead, guests pour for one another, or shaku. Keep an eye on companions’ cups and offer a refill before they are empty.
When pouring, hold the bottle with both hands: the dominant hand at the neck and the other at the base. When receiving or holding a cup, support it with the other hand beneath it. Wait until everybody has a drink before the first sip and join the toast, kampai. Although the literal sense is “empty cup,” it does not require drinking the whole serving at once.
The small ceramic cup is an ochoko, often filled from a tokkuri flask. A masu, the square wooden box once used to measure rice, holds exactly one go, or 180.4 ml. Between servings, drink water known as yawaragi-mizu. In Japan, the legal drinking age is 20, and the rule applies to beverages containing 1% alcohol or more. Avoid the toast “chin chin”: in Japanese, it refers to male genitals.
Expect more alcohol than beer and a wide price range
Most bottled sake is diluted with water after fermentation to 14–16% alcohol by volume. Undiluted genshu usually contains 18–20% ABV. That places typical sake above beer at roughly 3–9% ABV and at or above the upper end of wine’s 9–16% ABV range.
| Example in Japan | Typical price | What it shows |
|---|---|---|
| 720 ml Junmai | 1,000–2,000 yen | An everyday entry point for a named style. |
| 720 ml Junmai Daiginjo using 50% polished Yamadanishiki rice | About 5,000–6,000 yen | More polishing and a premium rice can raise the price. |
| 1.8 L Futsū-shu | About 1,890 yen | Table sake can be bought in a larger format at a lower price point. |
Rice accounts for more than 70% of the ingredient cost of a basic Futsū-shu, while koji, yeast, and water make up the remaining 30%. Japan’s alcohol tax is about 26% of a bottle’s retail price. Price can reflect rice, polishing, production, taxes, and format, so it is not a simple score for quality.
Common sake myths can lead to bad choices
- Myth: Sake is just wine. It is a rice-brewed drink made through parallel double fermentation, not simple fermentation of grape juice.
- Myth: “Sake” always means nihonshu in Japanese. The word can refer to alcohol generally; nihonshu identifies the Japanese rice drink.
- Myth: Warm sake is always cheap sake. Warm service at 40–50°C is a deliberate way to bring out fuller and grain-forward aromas.
- Myth: A 60% polishing ratio means 60% was removed. It means 60% of the grain remains and 40% was polished away.
- Myth: Kampai means you must empty the cup. The shared toast starts the round; it does not require finishing the serving in one gulp.
Frequently Asked Questions
What is sake in Japan?
Outside Japan, sake commonly means Japanese rice wine. In Japanese, sake can mean any alcohol, while the specific fermented rice drink is called nihonshu.
How is sake made?
Brewers polish, wash, soak, and steam rice, then make koji and a shubo yeast starter. In the moromi mash, koji turns starch to sugar while yeast turns sugar to alcohol; the sake is pressed, pasteurized, and usually aged for three to six months.
How strong is sake?
Most sake is 14–16% ABV after dilution. Genshu is undiluted sake and is usually 18–20% ABV.
How do you drink sake in Japan?
Serve sake chilled at 8–15°C, at room temperature from 15–25°C, or warm at 40–50°C. At a shared table, pour for others, wait for kampai, and drink water between servings.
How much does sake cost in Japan?
A 720 ml bottle of Junmai commonly costs 1,000–2,000 yen. A 720 ml Junmai Daiginjo made with 50% polished Yamadanishiki rice can cost about 5,000–6,000 yen.
