Japanese Clear Soup

Japanese cuisine is known for its simplicity and elegance, and one of the most celebrated dishes is the clear soup, often served as an appetizer in traditional Japanese meals. This clear soup, known as “osuimono” or “sumashi jiru”, is a delicate, light broth that perfectly balances umami flavors. Here, we provide a comprehensive guide to crafting the perfect Japanese clear soup in your kitchen.

Ingredients for Japanese Clear Soup

To prepare an authentic Japanese clear soup, you will need the following ingredients:

Primary Ingredients:

  • Dashi Stock: The base of the soup, made from kombu (dried kelp) and bonito flakes.
  • Soy Sauce: Adds a rich, salty flavor to the broth.
  • Mirin: A sweet rice wine that provides a subtle sweetness.
  • Salt: Enhances the overall flavor of the soup.

Optional Additions:

  • Tofu: Adds protein and a soft texture.
  • Mushrooms: Shiitake or enoki mushrooms bring an earthy taste.
  • Wakame Seaweed: A type of edible seaweed that adds both flavor and nutrition.
  • Green Onions: For a fresh, slightly sharp contrast.
  • Carrots: Sliced thinly for a touch of sweetness and color.
  • Kamaboko (Fish Cake): Traditional Japanese fish cake, often used for its unique flavor and texture.
Japanese Clear Soup

How to Make Dashi Stock

The key to an exceptional Japanese clear soup is the dashi stock. This traditional Japanese broth is fundamental in many dishes and remarkably simple to make.

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Ingredients for Dashi Stock:

  • 4 cups of water
  • 1 piece of kombu (about 4 inches long)
  • 1 cup of bonito flakes


  1. Soak the Kombu: Begin by soaking the kombu in water for about 30 minutes. This helps to extract the umami flavor.
  2. Heat the Water: Place the pot on medium heat and bring it to just before boiling. Remove the kombu just before the water boils to prevent a bitter taste.
  3. Add Bonito Flakes: Once the kombu is removed, add the bonito flakes. Let them sink naturally and simmer for about 5 minutes.
  4. Strain the Dashi: Strain the liquid through a fine mesh sieve or cheesecloth to remove the bonito flakes. Your dashi stock is now ready to use.

Steps to Prepare Japanese Clear Soup

1. Prepare the Base:

  • Combine Ingredients: In a medium saucepan, combine the freshly made dashi stock, soy sauce, mirin, and a pinch of salt. Adjust the seasoning to taste.
  • Heat the Broth: Bring the mixture to a gentle simmer over medium heat.

2. Add the Optional Ingredients:

  • Tofu: Cut into small cubes and add to the simmering broth.
  • Mushrooms: Clean and slice the mushrooms before adding them to the soup.
  • Wakame Seaweed: Rinse and soak the seaweed in water for a few minutes, then add it to the pot.
  • Green Onions: Finely chop the green onions and add them in.
  • Carrots: Thinly slice the carrots and add them for a touch of color.
  • Kamaboko: Slice the fish cake thinly and add to the broth.

3. Simmer and Serve:

  • Simmer: Let the soup simmer for about 5-10 minutes to allow the flavors to meld together.
  • Serve: Ladle the soup into bowls, ensuring each bowl gets a bit of each ingredient.

Tips for Perfect Japanese Clear Soup

1. Quality of Ingredients:

  • Freshness: Use the freshest ingredients available. The quality of kombu, bonito flakes, and vegetables directly impacts the flavor.
  • Balance: Maintain a balance between salty, sweet, and umami flavors.

2. Presentation:

  • Aesthetic: Japanese cuisine values presentation. Arrange the ingredients thoughtfully in the bowl.
  • Garnish: Use fresh herbs like mitsuba or a slice of yuzu peel for an aromatic touch.

3. Experimentation:

  • Flavor Variations: Experiment with different types of mushrooms or add a splash of sake for depth.
  • Vegetarian Version: Replace bonito flakes with shiitake mushrooms for a vegetarian dashi.

Health Benefits of Japanese Clear Soup

Japanese clear soup is not only a delight to the palate but also offers numerous health benefits:

1. Low in Calories:

This soup is incredibly low in calories, making it an ideal choice for those looking to maintain a healthy weight.

2. Rich in Nutrients:

  • Seaweed: Wakame seaweed is rich in iodine, calcium, and vitamins A, C, E, and K.
  • Tofu: Provides a good source of protein, iron, and calcium.

3. Digestive Aid:

  • Light and Clear: Its light nature makes it easy to digest and soothing for the stomach.
  • Enzymes: Ingredients like kombu contain digestive enzymes that can help break down food more efficiently.

4. Hydration:

  • High Water Content: The high water content in the soup helps in keeping you hydrated.

Cultural Significance of Japanese Clear Soup

1. Traditional Beginnings:

Osuimono is traditionally served at the beginning of a Japanese meal to prepare the palate for the subsequent dishes. Its light flavor is designed to be a gentle introduction to the rich and varied tastes of Japanese cuisine.

2. Festive Occasions:

This soup often features in New Year’s celebrations and other significant Japanese festivals, symbolizing purity and renewal.

3. Regional Variations:

Different regions in Japan have their own versions of clear soup, reflecting local ingredients and culinary traditions.


Mastering the art of making Japanese clear soup is a rewarding endeavor that brings the delicate and harmonious flavors of Japan to your table. With quality ingredients, attention to detail, and a respect for traditional methods, you can create a soup that is both delicious and nourishing. Enjoy the subtle yet profound flavors of this timeless dish and appreciate the elegance it brings to any meal.

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