What Does Rice Polishing Mean? Understanding Sake Grades

If you've ever looked at a sake label and wondered what "Junmai Daiginjo" or "Ginjo" actually means — you're not alone. Sake grades can seem confusing at first, but once you understand the key concept of rice polishing, everything clicks into place.

It All Starts With the Rice

Sake is made from rice, but not just any rice — special sake rice varieties with larger grains and a starchy core. Before brewing begins, the outer layers of each grain are milled away. This process is called seimaibuai, or rice polishing.

Why does this matter? The outer layers of rice contain proteins and fats that can produce harsh, off-flavours in sake. The more you polish away, the purer and more refined the flavour of the resulting sake.

The Polishing Ratio Explained

The polishing ratio tells you how much of the original grain remains after milling. So:

• 70% polishing ratio = 30% of the grain has been milled away
• 50% polishing ratio = 50% has been milled away (only half the grain remains)
• 35% polishing ratio = 65% has been milled away (only a third remains)

The lower the number, the more polishing has occurred — and generally, the more delicate and premium the sake.

The Sake Grade System

Japanese sake grades are defined by the polishing ratio and whether distilled alcohol has been added:

Junmai (純米)

Made purely from rice, water, yeast, and koji — no added alcohol. "Junmai" simply means "pure rice." These sakes tend to be fuller-bodied with more umami character.

Ginjo (吹醒)

Polished to at least 60% (40% milled away). Ginjo sakes are brewed at lower temperatures for longer, producing fruity, floral aromas. Lighter and more aromatic than standard sake.

Junmai Ginjo (純米吹醒)

The pure rice version of Ginjo — no added alcohol, polished to at least 60%. A great middle ground: fruity and aromatic with more body than Daiginjo.

Daiginjo (大吹醒)

Polished to at least 50% — half the grain is milled away. These are the most refined and complex sakes, with delicate floral and fruity notes. Premium territory.

Junmai Daiginjo (純米大吹醒)

The pinnacle of sake brewing — pure rice, polished to at least 50%, often much more. Our Laugh with SAKE Junmai Daiginjo 35 Zuiun is polished to just 35%, meaning 65% of the grain has been removed. This level of craftsmanship is extraordinary.

Nigori (にごり)

Unfiltered sake with rice sediment left in, giving it a cloudy, milky appearance. Nigori can be made from any grade of rice but has a distinctively creamy, slightly sweet character. Our Laugh with SAKE Namachozoshu Nigori Sake is a wonderful example.

Does More Polishing Always Mean Better?

Not necessarily — it means different. Highly polished Daiginjo sakes are incredibly elegant and delicate. But a well-made Junmai with less polishing can be deeply satisfying, with rich umami and complexity that pairs beautifully with food. It's about matching the sake to the occasion.

Where to Start

If you're new to sake, a Junmai Ginjo is a great entry point — approachable, aromatic, and food-friendly. Our Laugh with SAKE Junmai Ginjo Iyo Shizukuhime is a perfect first bottle. Ready to explore? Browse the full Premium Pour range.