The Four Types of Sake: A Better Way to Choose Than the Label
Sake can be sorted into four flavor types — kunshu (薫酒, fragrant), soshu (爽酒, light and smooth), junshu (醇酒, rich) and jukushu (熟酒, aged) — a scheme drawn up by the Japanese sake-service organization SSI after it tasted more than 20,000 sake (SSI, 2020). It is a more useful tool at the shelf than the legal designations such as junmai or ginjo, because it describes what is in the glass rather than how the rice was treated. This guide explains each type, how it maps loosely onto the label, and how to use it to choose a bottle.
What are the four types of sake?
SSI sorts sake into four types by combining aroma and taste, a grouping it says emerged from tasting more than 20,000 sake and designed so that beginners could follow it (SSI, 2020, updated 2023). JETRO, Japan’s trade-promotion agency, uses the same four-way split in its English-language sake guide, describing aromatic, smooth and refreshing, rich, and rich-and-complex styles (JETRO).
Picture a small map. One axis is how loudly the sake smells; the other is how much body it has. Kunshu sits high on aroma, soshu is low on both, and junshu is quiet on aroma but full of rice. Jukushu takes the fourth corner for a different reason: time changes its color and its scent, so it needs a box of its own.
What is kunshu, the fragrant type?
Kunshu (薫酒) is the high-aroma type, and its sweet fruit-and-flower scent comes largely from two esters, isoamyl acetate (banana-like) and ethyl caproate (apple-like), which averaged 1.5 mg/L and 2.1 mg/L in ginjo sake in National Tax Agency survey data covering 2009 to 2013 (NTA).
Brewing research names the same pair as the main drivers of ginjo fragrance (Gong et al., 2025), which is why yeast choice matters as much as polishing; our guide to sake yeast goes deeper. SSI suggests serving kunshu at 10–15°C, since colder dulls the aroma and warmer loses the crispness, ideally in a wine glass. If aromatic whites are your doorway into wine, this is the nearest doorway into sake.
What is soshu, the light and smooth type?
Soshu (爽酒) is the lightest of the four and is served the coldest, at about 5–10°C in SSI’s guidance, a clean and easy-drinking style usually described as tanrei (淡麗, light and delicate) (SSI).
Light is a style, not a grade. SSI places everyday honjozo, ordinary sake and fresh, unpasteurized nama sake here, and notes that some of the plainer bottles are happiest warmed to 45–50°C. Think of a crisp, unoaked white: it works as a palate cleanser beside rich food as well as a pleasure on its own.
What is junshu, the rich type?
Junshu (醇酒) is the rich type, built on rice umami and body, and SSI puts its ideal serving range at 18–20°C, close to room temperature, with gentle warming also suiting it (SSI).
SSI links junshu mainly to junmai sake, particularly the slow kimoto and yamahai starters we describe in our kimoto and yamahai guide, and to some undiluted genshu. This is the type for bold, savoury, cheesy food; SSI’s own suggestions range from fermented fish-gut snacks to pizza, and our pairing guide explains why the umami bridge works. In wine terms it behaves more like a textured white or a light red than a delicate aperitif.
What is jukushu, the aged type?
Jukushu (熟酒) is aged sake, and SSI treats sake matured for three years or more, especially ten years or more, as the typical examples (SSI).
Expect a golden color, aromas of dried fruit and spice, and a thick, mellow texture. SSI gives a wide serving range of 15–25°C, with a few heavier bottles suiting about 35°C. A sommelier might reach for sherry as a mental reference point, though that is an analogy and not a rule. An old bottle forgotten at the back of a cupboard is not automatically jukushu; our piece on aged sake explains the difference.
Do the four types match junmai, ginjo and the other designations?
No: Japan’s eight legal designations are defined by rice polishing and added alcohol (ginjo needs a polishing ratio of 60% or less, daiginjo 50% or less), whereas the four types are defined by what you smell and taste (NTA, Sake no shiori, 2025).
The two systems overlap rather than line up. In SSI’s mapping, kunshu mostly corresponds to daiginjo and ginjo; soshu to ordinary sake, honjozo and fresh nama styles; junshu to junmai and some genshu; and jukushu to any designation once it has been aged long enough. For the legal side, see the eight designations explained.
A designation tells you what the brewer did to the rice. A type tells you what arrives at your nose and tongue. Clinicians learn to sort before they treat, and a four-box triage is useful precisely because it is crude: it will not predict every bottle, but it stops you ordering a delicate, chilled soshu when you wanted something broad and warming. Wine labels hand you grape and place as a shortcut to style. Sake labels hand you process, and the four types are the translation layer between the two.
How do you use the four types to choose a bottle?
Four words are enough to brief a shop assistant or sommelier: ask for fragrant, light, rich or aged, and let them find a bottle from any designation.
It also works the other way round. Decide how you want to drink first: well chilled and delicate points to soshu or kunshu, room temperature or warm points to junshu, and slow sipping after dinner points to jukushu. Once the type is settled, the details in our first-bottle guide help you confirm the choice from the label.
Where do the four types fall short?
They are a teaching framework and not a law: SSI itself notes that some junmai and unfiltered, undiluted sake can still count as kunshu, so a single bottle can land on a border between two types (SSI).
It is also one organization’s way of mapping the territory, and you will rarely see it printed on a label. Treat it as a map and not a verdict. If a shop’s description and your own nose disagree, believe your nose.
Frequently asked questions
Who created the four types of sake?
SSI, a Japanese sake-service organization, proposed the four flavor types, which its website says it derived from tasting more than 20,000 sake (SSI). The page was published in 2020 and last updated in 2023.
Which of the four types should a beginner try first?
There is no single correct first type, so start from the wine you already enjoy: kunshu for aromatic whites, soshu for crisp ones, junshu for rounder, savoury styles. Our first-bottle guide walks through the label side of the same decision.
Should every type of sake be served cold?
No: SSI’s guidance runs from 5–10°C for soshu and 10–15°C for kunshu up to 18–20°C for junshu and 15–25°C for jukushu, so only the lighter types are firmly cold-leaning (SSI). For the aroma science behind warming, see our hot or cold guide.
How long must sake age to count as jukushu?
SSI describes sake aged for three years or more, and especially ten years or more, as typical jukushu, and says any designation can qualify once it has aged that long (SSI). It is a descriptive guide rather than a legal threshold.
Sources
- SSI. Sake flavor-characteristic classification, four types (日本酒の香味特性別分類（4タイプ）), published 8 July 2020, updated 30 March 2023. ssi-w.com
- National Tax Agency (Japan). National Survey of Alcoholic Beverages: components of Japanese sake (data 2009–2013). nta.go.jp
- National Tax Agency (Japan). Sake no shiori (酒のしおり), item 17: alcohol labeling obligations, including the designation table (2025 edition). nta.go.jp
- Gong Y. et al. Combinatory breeding of sake yeast strains with mutations that enhance Ginjo aroma production. Bioscience, Biotechnology, and Biochemistry 89(6):910–917, 2025. doi.org/10.1093/bbb/zbaf029
- JETRO. Selected sakes. japan-food.jetro.go.jp
Written by Dr. Sake. We take sake apart — the chemistry, the history, the label — and put it back together in plain English. For weekly diagrams, label breakdowns and brewery notes, follow @thesakeanatomy on Instagram.
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