Brewing Rustic Sake with Koji / homebrewing rice wine recipe, Japanese farmhouse style
Brewing RUSTIC SAKE with KOJI / homebrewing rice wine recipe, Japanese farmhouse style is a medium Japanese recipe that serves 12. 120 calories per serving. Recipe by Jeff Rubidge on YouTube.
Prep: 3 hrs 45 min | Cook: 336 hrs 40 min | Total: 340 hrs 15 min
Cost: $26.04 total, $2.17 per serving
Ingredients
- 750 g Sweet Glutinous Rice (also called mochigome, rinsed gently)
- 2 L Water (filtered or spring water)
- 0.25 tsp Citric Acid (beginner shortcut for lactic acid)
- 200 g Kome Koji (Koji‑inoculated Rice) (prepared in previous video, fresh and active)
- 1 tsp White Wine Yeast (e.g., Lalvin EC‑1118 or any champagne yeast)
Instructions
Rinse the Rice
Place the 750 g sweet rice in a large bowl and rinse gently under cold water, swirling with your hand until the water runs clear.
Time: PT5M
Soak the Rice
Fill the bowl with fresh water to cover the rice and let it soak for 1½ hours.
Time: PT1H30M
Drain the Rice
Pour the soaked rice into a fine mesh sieve and let it drain for 20 minutes.
Time: PT20M
Steam the Rice
Arrange the drained rice in a bamboo steamer lined with cheesecloth and steam for 40 minutes.
Time: PT40M
Temperature: 100°C
Cool the Rice
Spread the steamed rice on a clean tray and let it cool to 30 °C (86 °F) before adding the koji.
Time: PT30M
Temperature: 30°C
Prepare the Fermentation Base
In a separate container, dissolve ¼ tsp citric acid in 2 L water, then stir in the 200 g kome koji and 1 tsp white wine yeast until evenly distributed.
Time: PT10M
Combine Rice and Fermentation Base
Transfer the cooled rice into the 10 L fermentation jar, pour the koji‑water‑yeast mixture over it, and give a gentle stir to combine.
Time: PT5M
Ferment
Seal the jar loosely (or cover with a clean cloth) and place it in a dark, cool spot at about 18 °C (64 °F). Stir the mash once a day with a clean wooden spoon for 14 days.
Time: PT336H40M
Temperature: 18°C
Filter the Sake
After 14 days, line a funnel with an 80 µm filter cloth, set it over a clean container, and slowly pour the mash through, squeezing the cloth gently to extract the liquid.
Time: PT15M
Bottle and Chill
Transfer the filtered sake into clean bottles, seal, and refrigerate. Taste after a few days; the flavor will mellow and clarity will improve.
Time: PT5M
Nutrition Facts
- Calories
- 120
- Protein
- 0 g
- Carbohydrates
- 30 g
- Fat
- 0 g
- Fiber
- 0 g
Dietary info: Vegan, Gluten‑free, Alcoholic
Allergens: Rice, Yeast
Ingredient Substitutions
- Instead of Sweet Glutinous Rice: Short‑grain sushi rice
- Instead of Citric Acid: Lactic acid
- Instead of Kome Koji (Koji‑inoculated Rice): Store‑bought koji rice
- Instead of White Wine Yeast: Sake yeast, Champagne yeast
Equipment Needed
- Large Bowl
- Fine Mesh Sieve
- Bamboo Steamer or Rice Steamer
- Thermometer
- Large Fermentation Jar (10 L)
- Wooden Stirring Spoon
- 80 µm Filter Cloth (Cheesecloth)
- Funnel
- Ladle (optional)
- Measuring Spoons
Critical Steps — Do Not Skip
- Gentle rice washing to keep water clear
- Cooling rice to exactly 30 °C before adding koji
- Maintaining fermentation temperature around 18 °C
- Daily stirring during fermentation
- Proper filtration using 80 µm cloth
Chef Tips from the Video
- Use a digital kitchen scale for precise rice and koji measurements.
- A clean, food‑grade plastic bucket works well for large batches and is less likely to break than glass.
- If you lack a thermometer, place the rice on a warm surface and wait until it feels comfortably warm before adding koji.
Troubleshooting
No bubbling during fermentation
Check that the ambient temperature is at least 15 °C; gently stir and add a pinch more yeast if needed.
Excessive sour or off‑flavors
Make sure the citric acid amount is accurate; over‑acidifying can cause harsh taste. Also verify the koji is fresh and not moldy.
Bitter finish in the final sake
Bitter notes often come from over‑fermented koji spores; use fresh, well‑grown koji and limit fermentation to 14 days.
Storage
Refrigerator: Up to 1 month, keep sealed.
Freezer: Not recommended; freezing can affect flavor.
Room temperature: Only for a few hours during fermentation; otherwise keep chilled.
Make-Ahead Tips
- Prepare kome koji a week in advance and store it in the refrigerator.
- Sanitize all jars and utensils with a mild bleach solution before use.
- The filtered sake can be bottled and stored for up to a month; flavor improves after a few days.
Frequently Asked Questions
What is the cultural significance and history of farmhouse sake (rice wine) in Japanese cuisine?
Farmhouse sake, also called "doburoku" or "shirozake," originated in rural Japan where families brewed small batches at home for personal consumption. It reflects a tradition of using locally grown rice and natural fermentation, often tied to seasonal festivals and communal gatherings.
What are the traditional regional variations of farmhouse sake in Japan?
In the Kansai region, brewers often use a higher proportion of water for a lighter body, while in the Tohoku area the mash may be left longer to develop a richer, earthier flavor. Some regions add a pinch of salt or use different koji strains to create distinct regional profiles.
How is farmhouse sake traditionally served in Japanese culture?
It is typically served chilled or at room temperature in small ceramic cups called "ochoko." In rural festivals, it may be poured into wooden barrels and shared from a communal ladle, emphasizing hospitality and togetherness.
What occasions or celebrations is farmhouse sake traditionally associated with in Japan?
Farmhouse sake is often brewed for harvest festivals, New Year celebrations (Oshogatsu), and local shrine events. It is also offered as a libation to ancestors during Obon.
How does farmhouse sake fit into the broader Japanese sake tradition?
While polished‑rice sake (junmai) dominates commercial production, farmhouse sake represents the grassroots, artisanal side of the tradition, preserving ancient techniques like natural koji inoculation and low‑tech fermentation.
What are the authentic traditional ingredients for farmhouse sake versus acceptable substitutes?
Authentic ingredients are short‑grain glutinous rice, koji‑inoculated rice, water, and natural lactic acid from the mash. Substitutes include citric acid for lactic acid, white wine or champagne yeast instead of traditional sake yeast, and short‑grain sushi rice if sweet rice is unavailable.
What other Japanese dishes pair well with farmhouse sake?
Lightly salted dishes such as edamame, grilled fish (yakizakana), pickled vegetables (tsukemono), and simple rice balls (onigiri) complement the mild sweetness and gentle acidity of farmhouse sake.
What makes farmhouse sake special or unique in Japanese cuisine?
Its rustic character, cloudy appearance, and slightly sweet‑tart flavor set it apart from refined, filtered sake. The home‑brewed process preserves more of the rice’s natural aromas and offers a direct connection to the terroir of the rice and water used.
How has farmhouse sake evolved over time in Japan?
Originally a purely home‑grown beverage, farmhouse sake has seen a resurgence among craft brewers who experiment with different koji strains, temperature‑controlled fermentations, and modern sanitation methods, blending tradition with contemporary techniques.
What are common misconceptions about farmhouse sake?
Many think farmhouse sake is always low‑quality or unsafe, but when properly sanitized and fermented at controlled temperatures, it is a safe, flavorful drink. Another myth is that it must be cloudy; with careful filtration it can be clear while retaining its rustic taste.
What are the most common mistakes to avoid when making farmhouse sake at home?
Common errors include overheating the rice, adding koji before the mash reaches the proper 30 °C temperature, fermenting at too high a temperature (which can produce off‑flavors), and neglecting daily stirring, which reduces lactic acid development and can lead to contamination.
How do I know when the farmhouse sake is done fermenting?
After 14 days you should see a steady layer of clear liquid on top, a light foam, and a pleasant sweet‑tart aroma. The rice will have broken down into a soft paste that squeezes easily, and the brew will have a mild alcohol scent without strong sour or rotten notes.
What does the YouTube channel Jeff Rubidge specialize in?
Jeff Rubidge focuses on home fermentation projects, especially traditional Asian beverages like rice wine, kombucha, and miso, providing detailed, science‑backed tutorials for beginners and intermediate brewers.
How does the YouTube channel Jeff Rubidge's approach to Japanese brewing differ from other brewing channels?
Jeff Rubidge emphasizes low‑tech, kitchen‑friendly methods, using readily available equipment and clear step‑by‑step explanations, whereas many other channels rely on specialized brewing kits or advanced microbiology terminology.
Last updated: August 31, 2026
