Unlike distilled spirits like whiskey or brandy, Japanese sake is a brewed alcohol—more akin to beer and wine. But while they share the category of “fermented beverages,” the process behind sake is a world apart. In fact, it’s this unique method that gives sake its delicate complexity and air of quiet mystery.

Most brewed drinks—like wine or beer—follow relatively straightforward fermentation methods. Wine, for instance, is made from grapes that are naturally high in sugar. Yeast simply converts those sugars into alcohol—easy. Beer is a bit more involved: grains like barley need their starches broken down into sugars first (a step called saccharification), before yeast can do its work. But even then, these steps happen one after the other.

Sake, however, is a different story. Its brewing involves a rare process called multiple parallel fermentation. Here’s how it works: in a single tank, koji mold breaks down rice starch into sugar, while at the same time, yeast transforms that sugar into alcohol. These two conversions—normally done in separate stages for other beverages—happen simultaneously in the same fermentation mash, known as moromi.

Brewing sake is more than just a process—it’s a centuries-old ritual of precision, patience, and passion. Each step, from polishing the rice to pouring the final glass, is a delicate balance of science and craftsmanship. Here’s how this iconic Japanese drink comes to life:

1. Rice Polishing

Sake begins with a special kind of rice, grown just for brewing—larger grains, low in protein, and packed with potential. Before fermentation can begin, each grain is carefully polished in high-tech mills, gently shaving off the outer layers to reveal the pure, starchy core. The more the rice is polished, the cleaner and more refined the resulting sake.

2. Washing

After polishing, the rice is coated in fine powder. It’s washed thoroughly to remove this residue, ensuring a clean start for the brewing process.

3. Soaking

The washed rice is soaked in water to absorb just the right amount of moisture. Timing is crucial—seconds can make a difference in how the rice behaves during steaming.

4. Steaming

Next, the rice is steamed for 40 to 60 minutes. This isn’t just cooking—it’s transformation. The goal is a perfect texture: soft on the outside, firm at the core. Once steamed, the rice is cooled and divided for use in either koji making or the fermentation mash.

5. Koji Making

Enter koji, the soul of sake. A portion of the steamed rice is sprinkled with koji mold spores, which convert starches into fermentable sugars. This step is done in a warm, humid room under constant, careful monitoring. The quality of the koji greatly influences the flavor, aroma, and character of the final brew.

6. Starter Mash

Steamed rice, koji, yeast, and water are blended to form the starter mash (shubo or moto). This powerful mixture cultivates robust yeast activity, laying the foundation for fermentation. The technique has remained largely unchanged since Japan’s Edo period.

7. Main Fermentation:

The starter mash is transferred to a larger tank, and over three successive additions—more steamed rice, water, and koji—the main fermentation mash (moromi) is built up. This slow and steady process gives the yeast time to thrive, and the simultaneous saccharification and fermentation (multiple parallel fermentation) begin.

8. Pressing

After about 20–30 days of fermentation, it’s time to separate the sake from the lees (sake kasu). The mash is gently pressed, releasing a fragrant, milky sake that is then collected for the next stage.

9. Filtering

The sake is filtered to remove any remaining fine particles and adjust the taste and clarity. This step brings balance and polish to the final brew.

10. Pasteurisation:

To stabilise the sake and prevent unwanted bacteria or enzymes from altering its flavour, it is gently pasteurised at low temperatures—usually twice: once after filtering, and once before bottling.

11. Maturation

The sake is then aged for several months, typically around six, in tanks. During this quiet period, flavours mellow, harmonise, and deepen.

12. Dilution

Before bottling, water is added to adjust the alcohol content—usually bringing it down to around 13–16%. The right result is smooth, balanced sake.

13. Filtering – second time

14. Pasteurisation – second time

15. Bottling

16. Drink sake!

Each bottle of sake is the product of this intricate, multi-stage process—a dance of elements guided by human hands and deep-rooted tradition. It’s not just a drink—it’s a story, brewed to perfection.