What Is Sake Polishing Ratio?
Beginner's Sake Guide
Understand the label. Discover your style. What Is Sake Polishing Ratio?
You may have seen a number such as "60%" on a sake label. This is the rice polishing ratio—called seimaibuai in Japanese—and it tells you how much of each rice grain remains after polishing. Once you understand it, choosing between Junmai, Ginjo and Daiginjo becomes much easier.
What Is Seimaibuai?
Seimaibuai is the percentage of rice remaining after polishing.
100% unpolished → around 70% → 60% or less → 50% or less
Sake Polishing Ratio, Explained
The number tells you how much of the original rice grain remains—not how much was removed.
Three Things to Remember
Use the polishing ratio as a helpful clue, then consider aroma, body and the occasion.
The Number Means "Remaining"
A 60% polishing ratio means 40% was removed and 60% remains for brewing.
Lower Often Means More Refined
Greater polishing often supports a cleaner, more delicate and aromatic sake style.
The Number Is Not Everything
Rice variety, yeast, brewing technique, ageing and serving temperature also shape flavour.
Important: Junmai does not currently have a universal 70% polishing requirement. Ratios around 70% are common, but Junmai is defined primarily by its ingredients: rice, koji and water. Ginjo must use rice polished to 60% or less, while Daiginjo must use rice polished to 50% or less.
Junmai, Ginjo and Daiginjo Explained
Polishing ratio is one of the most useful clues to the style of sake inside the bottle.
Junmai (純米)
Made only from rice, koji and water. Junmai often highlights the natural savoury character of rice, with satisfying body and excellent food-pairing versatility. There is currently no single maximum polishing ratio for the Junmai category.
Explore Junmai Sake
Ginjo (吟醸)
Made with rice polished to 60% or less and brewed using the careful ginjo method. Ginjo is loved for lifted fruit and floral aromas, with a light, smooth and elegant palate.
Explore Ginjo Sake
Daiginjo (大吟醸)
Made with rice polished to 50% or less and brewed using the ginjo method. Daiginjo typically offers exceptional refinement, graceful aromas and a clean, lingering finish.
Explore Daiginjo SakeA useful distinction: Junmai Ginjo is made only from rice, koji and water, using rice polished to 60% or less. Junmai Daiginjo uses the same ingredients with rice polished to 50% or less. Ginjo and Daiginjo without "Junmai" may include a permitted small amount of brewer's alcohol.
Choose by Flavour at a Glance
Polishing ratio does not guarantee a particular taste. Use it as a guide to the style you may enjoy.
| Compare | Junmai | Ginjo | Daiginjo |
|---|---|---|---|
| Polishing ratio | No single maximum | 60% or less | 50% or less |
| Typical aroma | Gentle | Fragrant and fruity | Refined and complex |
| Typical palate | Rich and rice-forward | Light and smooth | Delicate and clean |
| Ideal for | Everyday meals and warm sake | Sashimi, sushi and seafood | Celebrations, gifts and fine dining |
Read the Label
Let the Number on the Label
Guide Your Next Bottle
Start with the polishing ratio, then consider the occasion and the aromas you enjoy. Even at the same ratio, rice variety, yeast, the brewer's technique and ageing can create very different flavours.
- For savoury depth and body: start with Junmai
- For bright, fruity aromas: try Ginjo or Junmai Ginjo
- For refinement and a sense of occasion: choose Daiginjo or Junmai Daiginjo
Sake Polishing Ratio FAQs
What is sake polishing ratio?
Sake polishing ratio, or seimaibuai, is the percentage of each rice grain remaining after polishing. A 60% ratio means 40% of the outer grain has been removed and 60% remains.
Does a lower polishing ratio always mean better sake?
A lower ratio generally requires more time and rice, but the number alone does not determine quality or personal preference. Rice variety, yeast, brewing method, ageing and serving style also shape the flavour.
What is the difference between Ginjo and Daiginjo?
Ginjo is made with rice polished to 60% or less, while Daiginjo uses rice polished to 50% or less. Both use ginjo-style brewing and are generally known for aromatic, refined flavours.
Does Junmai sake have to use a 70% polishing ratio?
No. Junmai currently has no single maximum polishing ratio. It must be made from rice, koji and water, and the ratio used must be shown on the label. Ratios around 70% are common, but 70% is not the definition of Junmai.
The More You Know, the Better Sake Gets.
Use polishing ratio as your first clue, then find a bottle to match your taste and occasion.
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