An Introduction to Nigori Sake: Usu-nigori, Origarami, and Active (Sparkling) Types

Cloudy white sake goes by several names: usu-nigori, origarami, and active nigori (kassei nigori). All belong to the nigori family, but the depth of the cloudiness and whether the sake fizzes change both the flavor and how you should handle the bottle. This article is for anyone curious about milky-white sake: what nigori actually is, how to tell the types apart, and how to serve and open it safely. The key fact to start with: nigori is still filtered seishu (refined sake). Once that's clear, the difference from the similar-looking doburoku becomes obvious too.

Nigori Is Seishu Filtered Through a Coarse Mesh

Nigori is seishu made by straining the moromi (fermenting mash) through a coarse cloth or sieve, leaving the ori (sediment) behind in the liquid. Ori refers to the undissolved solids from rice and rice koji; suspended in the sake, they give it its milky-white look.

So why does it still count as seishu? Japan's Liquor Tax Act defines seishu as a beverage made by fermenting rice, rice koji, and water (among other ingredients) and then "straining" it, with an alcohol content under 22%. "Straining" here covers any process that separates the moromi into a liquid portion and a solid residue. Nigori goes through this straining step, just with a coarser mesh than clear sake, which is exactly why it's classified as seishu.

It's a common misconception that cloudy sake can't be seishu. What decides the classification isn't clarity, but whether the mash was strained at all.

Reading the Bottle: Judging the Type by How Cloudy It Is

Nigori sake splits broadly into three levels of cloudiness: usu-nigori, nigori proper, and origarami. The more ori it retains, the thicker and creamier the texture.

Usu-nigori (literally "thin nigori") contains only a little ori, giving it a light, clean mouthfeel, an easy entry point if you find the classic nigori texture too heavy. It's sometimes sold under the closely related name sasa-nigori, though how cloudy a sasa-nigori actually is varies from brewery to brewery.

The richer style is what people usually mean by "nigori sake": milky white, syrupy, with the rice's sweetness and umami clearly on display.

Origarami follows a different path. The pressing itself uses a standard fine-mesh cloth, but the brewery skips ori-biki, the step of letting sediment settle so only the clear top layer is drawn off. The result is a faint haze from a small amount of fine sediment. Where usu-nigori starts by straining coarsely and keeping the ori, origarami starts by straining finely and simply not removing it, a different starting point that shows up in the glass. Usu-nigori tends to taste sweet and rounded; origarami sits closer to clear sake, with a light veil of umami depth layered on top.

The Fizzy Kind Is "Active Nigori"

Some nigori sake fizzes gently when you open the bottle. This is active nigori (kassei nigori). It skips hi-ire (heat pasteurization) and is bottled with live yeast still in it, so fermentation keeps going inside the sealed bottle. The carbon dioxide that fermentation produces is what gives it its light sparkle.

Active nigori needs careful handling, because ongoing fermentation keeps raising the pressure inside the bottle. Warmer temperatures speed up fermentation and generate more gas, so opening or storing it the wrong way can send the contents foaming out. Since the fizz works the same way as in sparkling sake, see also how sparkling sake gets its bubbles.

Doburoku Is Not Seishu

Nigori and doburoku look a lot alike, but the Liquor Tax Act puts them in separate categories, and again, the dividing line is whether the moromi was strained.

Doburoku is drunk as-is, without straining the moromi at all. Because it skips that step, it doesn't qualify as seishu; the law instead classifies it as "other brewed alcohol" (sonota no jozoshu). Much of today's craft sake also falls under this same "other brewed alcohol" category, though for a different reason than doburoku: adding ingredients beyond rice takes it outside the conditions for seishu.

Note that brewing your own alcohol at home without a license is not permitted under the Liquor Tax Act. If you want to compare the two, stick to commercially sold bottles.

How to Drink It: Stir In the Sediment, or Pour Off the Clear Top

How you treat the ori changes the character of the sake entirely. If sediment has settled at the bottom of the bottle, you have two ways to enjoy it.

One is to give the bottle a gentle stir before pouring, mixing the ori back in for a thick, full pour that carries all the sweetness and umami. The other is to pour without stirring, taking only the clear liquid on top, surprisingly crisp and clean. Being able to get two different experiences out of one bottle is part of what makes nigori sake fun.

Serve it well chilled to keep the sweetness in check; for a richer nigori, try it over ice for a sake-on-the-rocks effect. It pairs naturally with bold, hearty dishes: hot pot or spice-forward cooking, where the sweetness tempers the heat. For more on matching sake with food, see food pairing basics.

Opening and Storing Active Nigori: Watch for the Foam

Regular nigori keeps safely in a cool, dark place or the refrigerator. Active nigori is the one that needs extra care.

Always store active nigori upright in the fridge. Laying it on its side, or jostling it while carrying it, risks a mess. Even carrying it home from the shop, try to keep it upright as much as possible.

To open it, release the gas gradually and without rushing, following these steps:

1. Chill it thoroughly in the fridge and let it sit undisturbed for a few hours (the colder it is, the calmer the foam).
2. Work over a sink or somewhere a spill won't matter.
3. Loosen the cap just slightly. The moment you hear a hiss, stop.
4. As foam rises, retighten the cap and wait for it to settle.
5. Repeat steps 3–4 a few times until the foaming calms down before opening it the rest of the way.

Open it in one go and the contents will likely erupt. Take it slow and watch the foam as you go. For notes on storing unpasteurized sake, see also temperature and storage.

Nigori is a style of seishu shaped by how it's strained and how its fermentation is handled. Choose first by how cloudy you want it, then adjust your handling depending on whether it's active. Get those two right, and the wall of white bottles gets a lot easier to navigate.

• This article is intended for readers of legal drinking age (20 in Japan). Please drink responsibly. Avoid alcohol during pregnancy or breastfeeding, and never drink and drive.