Core Process & Structure

Question 1

What makes sake fermentation unique compared to other alcoholic beverages?

Answer 1

Parallel fermentation (heiko fukuhakko), where starch saccharification by koji and alcoholic fermentation by yeast occur simultaneously.

Question 2

What is the purpose of rice polishing in sake production?

Answer 2

To remove proteins, fats, and minerals from the outer layers, leaving starch for cleaner fermentation and refined flavors.

Question 3

Why is rice washed and soaked after polishing?

Answer 3

To remove residual rice powder and control water absorption before steaming.

Question 4

Why is rice steamed rather than boiled for sake?

Answer 4

Steaming gelatinizes starch while keeping the grain firm, allowing proper koji growth and controlled fermentation.