What Is Sake? A Guide to Japanese Sake, Grades & Styles

What Is Sake? A Guide to Japanese Sake, Grades & Styles

By Guilherme “William” Macedo, Master Sake Sommelier and Sake Educator

Sake, or Nihonshu (日本酒), is Japan's traditional fermented rice beverage, with centuries of history, craftsmanship, and culture behind it. Yet, despite its growing popularity, sake remains one of the most misunderstood beverages in the United States.

One of the misconceptions I frequently encounter is that sake is simply a Japanese rice wine that should always be served warm. In reality, sake offers remarkable diversity, from delicate, aromatic expressions to rich, savory, and complex styles.

Through my years of teaching sake, visiting breweries in Japan, and working with customers at 305 Wines in Miami, I have learned that understanding a few basic principles can completely change how someone experiences this fascinating beverage.

Whether you are discovering sake for the first time or looking to expand your knowledge, this guide will help you understand how sake is made, its classifications, and how to choose and enjoy different styles.

What Exactly Is Japanese Sake?

Sake is a fermented alcoholic beverage made primarily from four ingredients: rice, water, koji, and yeast.

Unlike wine, where naturally occurring sugars in grapes are fermented into alcohol, rice contains starch that must first be converted into sugar.

This is where koji, rice cultivated with the mold Aspergillus oryzae, plays an essential role.

During sake brewing, enzymes produced by koji convert rice starch into fermentable sugars while yeast converts those sugars into alcohol. These processes occur simultaneously in the same fermentation mash, a technique known as multiple parallel fermentation.

The result is a beverage typically containing around 13–17% alcohol, although stronger and lighter examples also exist.

While sake is commonly called rice wine, its production method is quite different from winemaking.

Understanding Sake Grades and Classifications

Japanese premium sake, known as Tokutei Meisho-shu, includes specific classifications determined by production methods, ingredients, and rice polishing requirements.

One of the most important concepts is the rice polishing ratio, or Seimaibuai.

This percentage indicates how much of the original rice grain remains after polishing, not how much has been removed.

For example, a polishing ratio of 50% means half of the original rice grain remains.

Polishing helps remove outer portions of the grain containing proteins, lipids, and other components that can influence fermentation and flavor. However, a lower polishing ratio does not automatically mean better sake. Quality ultimately depends on many factors, including the rice, water, yeast, koji, brewing technique, and skill of the brewer.

Junmai Daiginjo

Junmai Daiginjo is made using rice polished to 50% or less of its original weight, without added brewer's alcohol.

These sakes are often elegant and aromatic, with notes ranging from apple and pear to melon, flowers, and delicate rice characteristics.

The style frequently showcases the precision of modern Japanese sake brewing.

At 305 Wines, examples include Dassai 23, Dassai 39, Dassai 45, and selected Junmai Daiginjo from other respected breweries.

Daiginjo

Daiginjo shares the same maximum rice polishing ratio of 50%, but permits a limited addition of brewer's alcohol.

This addition is not necessarily intended to increase alcoholic strength. When used skillfully, it can help bring out aromatic compounds and contribute to a lighter, more precise texture.

Both Daiginjo and Junmai Daiginjo can produce exceptional sake, and neither should automatically be considered superior to the other.

Junmai Ginjo and Ginjo

Junmai Ginjo and Ginjo require rice polished to 60% or less.

Junmai Ginjo is produced without added brewer's alcohol, while Ginjo permits a limited addition.

These categories often offer beautiful aromatic complexity and versatility with food.

Examples from our collection include Katsuyama Ken Junmai Ginjo and Kubota Senju Ginjo, two different expressions that help illustrate the diversity within the Ginjo family.

Junmai

Junmai means pure rice sake and is made without added brewer's alcohol.

There is no fixed maximum rice polishing ratio for standard Junmai, although producers must meet the applicable production requirements.

Junmai can range from light and refreshing to rich, earthy, and savory. It is a particularly versatile category for food pairing.

Some of my favorite discoveries have been Junmai sakes with wonderful texture, balance, and character, even when the rice has been polished considerably less than in the Daiginjo categories.

Honjozo

Honjozo is made with rice polished to 70% or less and permits a limited addition of brewer's alcohol.

These sakes are often clean, balanced, and especially enjoyable with food. Some are excellent when gently warmed.

Tokubetsu Junmai and Tokubetsu Honjozo

Tokubetsu means special.

These classifications recognize sake produced with qualifying special ingredients or production methods, which may include a higher degree of rice polishing.

They can represent excellent discoveries for customers interested in exploring beyond the better-known Ginjo and Daiginjo categories.

Discovering Different Styles of Sake

Sake classifications are only part of the story.

Production techniques, pasteurization, aging, and filtration can create distinctive styles that exist across different sake grades.

Nigori — Cloudy Sake

Nigori is sake that has been coarsely filtered, allowing some rice particles to remain in the beverage.

Its appearance ranges from lightly hazy to thick and creamy. Some Nigori sakes are sweet and fruity, while others are dry and refreshing.

Nigori can be an excellent introduction for customers seeking unusual textures or a slightly different tasting experience.

Nama — Unpasteurized Sake

Nama sake is not pasteurized, helping preserve vibrant and sometimes particularly expressive aromas and flavors.

Because it is microbiologically less stable, proper refrigeration is especially important.

Related terms include Namazume, sake pasteurized before storage but not before bottling, and Namachozo, sake stored unpasteurized and pasteurized before bottling. These are different from fully unpasteurized Nama.

Genshu — Undiluted Sake

Genshu generally refers to sake that has not been diluted with water after fermentation, apart from limited permitted exceptions.

It often has higher alcohol content and a concentrated character, but not every Genshu is particularly strong.

Kimoto and Yamahai

Kimoto and Yamahai are traditional approaches to preparing the fermentation starter, involving the development of lactic acid through naturally occurring bacteria.

These methods can produce fascinating sakes with savory, earthy, and umami-rich characteristics, although some examples are surprisingly delicate.

They are especially interesting to explore with food.

Muroka

Muroka refers to sake that has not undergone charcoal filtration.

It does not necessarily mean that the sake has never been filtered or pressed to separate the liquid from the fermented rice solids.

Muroka can offer an expressive character, depending on how the sake was brewed.

Taru — Cedar-Aromatic Sake

Taru sake develops its distinctive cedar aroma through contact with Japanese cedar wood.

The resulting woody and herbal notes offer a traditional expression that can be particularly enjoyable with grilled foods.

Sake Rice Varieties: Why Do They Matter?

Just as grape varieties influence wine, the choice of rice can contribute to the character of sake.

Japan cultivates many varieties of rice used specifically for sake brewing.

Among the better-known examples are:

• Yamadanishiki: Highly prized for premium sake production and its suitability for precise fermentation.

• Gohyakumangoku: Often associated with clean, delicate sake, particularly in regions such as Niigata.

• Omachi: An old Japanese sake rice variety valued for its distinctive character and ability to produce complex expressions.

• Miyamanishiki: Widely used in northern Japan and appreciated for its brewing versatility.

Rice variety alone does not determine the final flavor. Water, yeast, koji, fermentation temperature, and the decisions of the brewer are equally important.

This is one of the reasons I find Japanese sake so fascinating: the same rice variety can produce remarkably different results in the hands of different breweries.

Discover Sake Through Japan's Prefectures

Sake is produced throughout Japan, and regional traditions are an important part of its identity.

Niigata is known for its reputation for light, dry sake, often described as Tanrei Karakuchi.

Yamagata has become particularly associated with aromatic, elegant Ginjo-style sake.

Akita, with its cold climate and rich sake brewing heritage, produces a wide diversity of expressions.

Hiroshima has a longstanding brewing tradition, including the development of methods suited to soft water.

Miyagi is another fascinating sake-producing prefecture, known for a range of balanced, food-friendly styles.

These regional descriptions are useful introductions, but they are not rigid rules. Every prefecture has breweries producing a wide range of styles.

At 305 Wines, customers can explore our Japanese sake collection by prefecture, discovering producers and traditions from different parts of Japan.

Should Sake Be Served Warm or Cold?

This is probably one of the questions I hear most frequently.

There is no single correct serving temperature for all sake.

Aromatic Ginjo and Daiginjo styles are commonly enjoyed chilled, often around 8–12°C (46–54°F), allowing their delicate aromas to shine.

Junmai and Honjozo can be enjoyable across a wider range of temperatures, from chilled to gently warmed.

Kimoto and Yamahai can be particularly interesting at room temperature or warmed, revealing changes in texture, savoriness, and aroma.

And while premium sake is often associated with chilled service, some exceptional premium sakes are also designed to be enjoyed warm.

My advice is simple: experiment with temperature. The same bottle can reveal surprisingly different characteristics when served a little warmer or cooler.

What Food Pairs Best with Japanese Sake?

One of sake's greatest strengths is its versatility at the table.

Its relatively low acidity compared with many wines, absence of grape-derived tannins, and range of textures and umami characteristics make it an excellent partner for many cuisines.

A few combinations worth exploring include:

• Junmai Daiginjo: Sashimi, oysters, steamed fish, and delicate seafood.

• Junmai Ginjo: Sushi, grilled fish, chicken, and vegetable dishes.

• Junmai: Yakitori, mushrooms, pork, roasted vegetables, and aged cheeses.

• Kimoto and Yamahai: Grilled meats, fermented foods, mushrooms, and savory dishes.

• Nigori: Spicy Asian cuisine, aromatic dishes, and certain desserts, depending on sweetness.

Sake is not limited to Japanese food. I particularly enjoy demonstrating how well it can work with Western cuisine, including cheese, seafood, and grilled meats.

The best pairing is not always the most expensive bottle. It is the one that complements the dish.

How to Choose Your First Bottle of Sake

If you are new to sake, I generally recommend starting with your personal preferences rather than focusing only on classifications or price.

If you enjoy aromatic white wines, you may appreciate a fruity Junmai Ginjo or Junmai Daiginjo.

If you prefer something dry and refreshing, explore a clean Ginjo or a lighter Junmai.

For those who enjoy richer textures, savory flavors, or more complex food pairings, Junmai, Kimoto, and Yamahai can be wonderful discoveries.

And if you enjoy sparkling wine, Japanese sparkling sake offers another interesting direction to explore.

There is no need to start with the most expensive sake. Discovering your own preferences is part of the experience.

Discover Japanese Sake at 305 Wines in Miami

At 305 Wines, sake is not simply another product category.

As a Master Sake Sommelier and Sake Educator, I personally select our Japanese sake collection, looking for quality, character, authenticity, and producers who offer something worth discovering.

Our family-owned shop offers one of Florida's most extensive selections of Japanese sake, bringing together well-known breweries and smaller producers from different regions of Japan.

To make exploring easier, our online collection can now be browsed by grade, style, rice variety, and prefecture.

Whether you are buying your first bottle, looking for a particular brewery, or searching for something special, we are happy to help.

Explore our Japanese sake selection online or visit us at 8233 S Dixie Highway, Miami, FL 33143, near South Miami and Pinecrest.

Sake is a beverage that rewards curiosity. There is always another style, rice variety, or brewery waiting to be discovered.

Kanpai!

Guilherme “William” Macedo
Master Sake Sommelier | Sake Educator
Co-Founder, 305 Wines & Florida Wine Academy