1. Choosing the right rice: Sake is primarily made from a special variety of rice known as “sakamai.” These rice grains have a higher starch content compared to regular eating rice. Examples of popular sakamai varieties include Yamada Nishiki, Gohyakumangoku, and Miyama Nishiki. Ideally, use rice specifically labeled for sake brewing to ensure a successful outcome.
2. Polishing the rice: Polishing, or milling, is a critical step in sake preparation. The outer layers of the rice grains, containing proteins and oils, also known as “nuka,” are removed to ensure a cleaner and more refined product. The percentage of rice remaining after polishing affects the grade and quality of the final sake.
3. Washing and soaking the rice: To remove impurities and excess surface starch, rinse the polished rice thoroughly under cold water. Let it soak for about an hour, allowing the water to penetrate the grains and prepare them for brewing.
4. Steaming the rice: Once the rice is sufficiently soaked, it needs to be steamed. Transfer the soaked rice to a steamer, cover it, and cook until it becomes tender but not mushy. Steaming time may vary depending on the quantity of rice and the type of steamer used.
5. Koji production: Koji is a crucial ingredient in sake preparation. It is made by inoculating steamed rice with the koji mold, Aspergillus oryzae. The koji mold converts the rice starches into fermentable sugars, essential for the fermentation process. Temperature and humidity must be carefully controlled during this stage to favor the growth of the koji mold.
6. Fermentation: Now comes the transformation of rice into sake. Combine the koji rice with water and yeast, creating a mixture called “moromi.” Fermentation starts slowly and then gradually increases in intensity over several days, often carried out in temperature-controlled fermentation tanks. The yeast converts the sugars into alcohol, resulting in the production of sake.
7. Pressing and filtering: Once fermentation is complete, the sake mash is pressed to separate the liquid from the solids, which are called “kasu.” Traditional methods involve using a wooden press, but modern techniques use mechanical presses. The resulting liquid is then filtered to remove any remaining impurities.
8. Pasteurization and aging: Sake is typically pasteurized to stabilize the quality and prevent any bacterial or yeast growth. After pasteurization, the sake can be aged for a few months to develop complex flavors and aromas. The aging process varies based on the desired style and characteristics of the sake.
9. Bottling and serving: Finally, the sake is bottled, sealed, and labeled. Sake can be enjoyed chilled, at room temperature, or warm, depending on personal preference and the type of sake. Each serving temperature brings out different flavors and nuances in the sake.
With these steps, you can have a basic understanding of how sake, the traditional rice wine, is prepared. It’s important to note that making high-quality sake requires extensive knowledge, experience, and specialized equipment. However, appreciating the process can enhance your enjoyment of this centuries-old drink. So, sit back, pour yourself a glass of sake, and savor its rich history and exquisite taste. Kanpai!