Amazake (甘酒) is one of Japan's oldest and most cherished traditional beverages. Known as the "drinkable dessert" or "drink of health," Amazake is a naturally sweet fermented rice drink that has been enjoyed in Japan for over a thousand years. Its smooth, creamy texture and gentle sweetness come from the natural fermentation of rice, making it a comforting drink served both hot in winter and chilled during summer festivals.

Unlike alcoholic sake, most homemade and koji-based Amazake contains little to no alcohol, making it suitable for children and those who avoid alcohol. Rich in vitamins, amino acids, and enzymes, Amazake has long been valued in Japan as a nourishing and energizing beverage.

Whether enjoyed plain, flavored with ginger, or blended into smoothies and desserts, Amazake is a delicious introduction to Japan's traditional fermented foods.

What is Amazake?

Amazake literally means "sweet sake," but despite its name, the most common version is a non-alcoholic fermented rice drink made using rice koji (rice inoculated with Aspergillus oryzae).

During fermentation, enzymes in the koji break down the rice starch into natural sugars, giving Amazake its signature sweetness without adding refined sugar.

There are two traditional types of Amazake:

Koji Amazake

  • Made from steamed rice and rice koji
  • Naturally sweet
  • Little to no alcohol
  • Rich in enzymes and nutrients
  • Most commonly consumed today

Sake Lees Amazake

  • Made from sake kasu (sake lees)
  • Contains a small amount of alcohol
  • Richer and slightly more robust in flavor
  • Often sweetened with added sugar

This recipe focuses on the traditional koji-based Amazake.

Why You'll Love This Recipe

  • Authentic Japanese fermented drink
  • Naturally sweet without refined sugar
  • Rich in probiotics and nutrients
  • Gluten-free
  • Vegetarian-friendly
  • Served hot or cold
  • Perfect for breakfast or a healthy snack
  • Easy to customize with different flavors

Preparation Time

  • Prep Time: 15 minutes
  • Fermentation Time: 8–10 hours
  • Total Time: About 10 hours

Servings: 4

Ingredients

For Traditional Koji Amazake

  • 200 g cooked Japanese short-grain rice
  • 200 g dried rice koji
  • 500 ml warm water (about 55–60°C / 131–140°F)

Optional Flavorings

  • Fresh grated ginger
  • Ground cinnamon
  • Matcha powder
  • Vanilla extract
  • Yuzu zest
  • Lemon zest
  • Honey (optional, if extra sweetness is desired)

Kitchen Equipment

  • Rice cooker
  • Thermometer
  • Large mixing bowl
  • Insulated container or yogurt maker
  • Wooden spoon
  • Blender (optional for a smoother texture)

Step-by-Step Instructions

Step 1: Prepare the Rice

Cook Japanese short-grain rice until soft.

Allow it to cool slightly.

The rice should still be warm but not hot.

Step 2: Combine Ingredients

In a clean bowl combine:

  • Cooked rice
  • Rice koji
  • Warm water

Mix thoroughly.

Step 3: Ferment

Transfer the mixture to:

  • A yogurt maker
  • Fermentation container
  • Rice cooker set to the "Keep Warm" function (only if it maintains about 55–60°C)

Maintain this temperature for 8–10 hours.

Stir every 2–3 hours.

As fermentation progresses, the mixture becomes naturally sweeter.

Step 4: Blend (Optional)

For a smoother Amazake:

Blend the fermented mixture until creamy.

Leave it chunky if you prefer a traditional rustic texture.

Step 5: Serve

Serve:

  • Warm during winter
  • Chilled during summer

Add ginger or your favorite flavoring if desired.

Chef's Tips

  • Keep the fermentation temperature below 60°C to protect the beneficial enzymes.
  • Stir occasionally to ensure even fermentation.
  • Taste periodically—the sweetness increases as fermentation continues.
  • Fresh rice koji produces the best flavor.
  • Blend only if you prefer a smoother drink.

Delicious Variations

Ginger Amazake

Add freshly grated ginger for a warming winter beverage.

Matcha Amazake

Whisk in matcha powder for an earthy green tea flavor.

Yuzu Amazake

Add fresh yuzu juice and zest for a refreshing citrus twist.

Vanilla Amazake

A splash of vanilla creates a dessert-like aroma.

Strawberry Amazake Smoothie

Blend with fresh strawberries and ice for a refreshing summer drink.

Banana Amazake

Blend with ripe banana for a naturally creamy breakfast smoothie.

Pumpkin Amazake

Mix with steamed Japanese pumpkin for an autumn-inspired drink.

What Makes Amazake Special?

Amazake is unique because its sweetness is created naturally through fermentation rather than added sugar. The enzymes in rice koji convert starch into glucose, resulting in a creamy, mildly sweet beverage that is both delicious and nutritious. Its long history and association with wellness have earned it the nickname "the drink of health" in Japan.

Nutritional Benefits

Koji-based Amazake contains:

  • Natural carbohydrates for energy
  • Amino acids
  • B vitamins
  • Dietary fiber
  • Beneficial enzymes
  • Probiotic-supporting compounds
  • Easily digestible nutrients

Approximate Nutrition (Per Serving)

  • Calories: 170 kcal
  • Protein: 4 g
  • Carbohydrates: 36 g
  • Fat: 1 g
  • Fiber: 2 g
  • Sodium: 10 mg

Best Pairings

Amazake pairs wonderfully with:

  • Mochi
  • Dorayaki
  • Taiyaki
  • Daifuku
  • Senbei (rice crackers)
  • Matcha sweets
  • Japanese breakfast dishes
  • Grilled fish
  • Pickled vegetables
  • Fresh fruit

Storage Tips

Refrigerator

Store in a sealed container for up to 5 days.

Stir well before serving.

Freezer

Freeze in portions for up to 1 month.

Thaw overnight in the refrigerator.

Serving Tip

Serve chilled in summer or gently warmed in winter. Avoid boiling after fermentation, as excessive heat can reduce the activity of naturally occurring enzymes.

Common Mistakes to Avoid

  • Using water that is too hot, which can damage the koji enzymes
  • Fermenting at temperatures that are too low or too high
  • Skipping regular stirring during fermentation
  • Using old or poor-quality rice koji
  • Fermenting for too long, which can alter the flavor
  • Storing at room temperature after fermentation is complete

Frequently Asked Questions

Is Amazake alcoholic?

Koji-based Amazake contains little to no alcohol and is generally considered non-alcoholic. Amazake made from sake lees (sake kasu) contains a small amount of alcohol.

What is rice koji?

Rice koji is steamed rice cultured with the beneficial mold Aspergillus oryzae. It is widely used in Japanese cuisine to make miso, soy sauce, sake, and Amazake.

Why is Amazake naturally sweet?

During fermentation, enzymes in the rice koji convert the rice's starches into natural sugars, eliminating the need for refined sugar.

Can I drink Amazake every day?

Many people in Japan enjoy Amazake regularly as part of a balanced diet. Since it contains natural sugars and carbohydrates, it is best consumed in moderation according to your nutritional needs.

Can I use brown rice?

Yes. Brown rice creates a heartier, nuttier Amazake with additional fiber, though the texture will be slightly less smooth than versions made with white Japanese rice.

Final Thoughts

Amazake is a timeless Japanese fermented drink that beautifully combines tradition, nutrition, and natural sweetness. Made with rice koji and steamed rice, it offers a creamy texture, delicate flavor, and centuries of cultural heritage in every sip. Whether served warm on a cold winter morning, chilled during a summer festival, or blended into a nourishing smoothie, Amazake is a versatile beverage that showcases the remarkable artistry of Japanese fermentation and the simple goodness of wholesome ingredients.