Skip to content

Is miso soup vegan?

white and orange flower petals

Miso soup is a traditional Japanese dish that has gained popularity worldwide for its unique flavor and health benefits. However, for those following a vegan diet, the question arises: is miso soup vegan? In this article, we will explore the ingredients used in miso soup and discuss whether it can be considered vegan-friendly.

What is miso soup?

Miso soup is a traditional Japanese soup made from fermented soybean paste called miso. It is typically made by combining miso paste with dashi, a Japanese soup stock, and adding various ingredients such as tofu, seaweed, and vegetables. Miso soup is known for its umami flavor and is often served as a side dish or as a starter in Japanese cuisine.

The ingredients in miso soup

When determining whether miso soup is vegan, it is essential to examine the ingredients used in its preparation. While the base ingredients of miso paste and dashi are generally vegan-friendly, some variations of miso soup may include non-vegan ingredients. Here are the key components of miso soup:

Miso paste

Miso paste is the primary ingredient in miso soup. It is made by fermenting soybeans with salt and a fungus called koji. The fermentation process can take anywhere from a few weeks to several years, resulting in different types of miso paste with varying flavors and colors. Traditional miso paste is vegan as it only contains soybeans, salt, and koji. However, some commercial miso pastes may contain additional ingredients such as fish or bonito flakes, which are not vegan-friendly. Therefore, it is crucial to check the label or make your own miso paste to ensure it is vegan.


Dashi is a Japanese soup stock that forms the base of miso soup. It is typically made from kombu (dried kelp) and katsuobushi (dried and smoked bonito flakes). While kombu-based dashi is vegan-friendly, the addition of bonito flakes makes it non-vegan. However, there are vegan alternatives available, such as kombu dashi or shiitake dashi, which can be used to make vegan miso soup.


Tofu is a common ingredient in miso soup, providing a source of protein and adding texture to the dish. Tofu is made from soy milk coagulated with a coagulant, usually a salt or acid. As long as the coagulant used is vegan-friendly, such as calcium sulfate or nigari (magnesium chloride), the tofu in miso soup is vegan.


Seaweed, such as wakame or kombu, is often added to miso soup for its nutritional value and unique flavor. Seaweed is a plant-based ingredient and is therefore vegan-friendly.


Miso soup can be customized with various vegetables, such as green onions, mushrooms, carrots, or daikon radish. All vegetables are vegan-friendly, making them suitable additions to vegan miso soup.

Is miso soup always vegan?

While miso soup can be vegan-friendly, it is essential to be cautious when ordering or preparing miso soup, as some variations may contain non-vegan ingredients. Here are a few factors to consider:

  • Restaurant miso soup: When dining out, miso soup may contain non-vegan ingredients, such as fish-based dashi or miso paste with added bonito flakes. It is advisable to inquire about the ingredients or request a vegan version of miso soup.
  • Store-bought miso paste: Some commercial miso pastes may contain non-vegan additives, such as fish or bonito flakes. Reading the label or opting for certified vegan miso paste ensures it is suitable for a vegan diet.
  • Homemade miso soup: Making miso soup at home allows full control over the ingredients used. By using vegan miso paste and vegan dashi alternatives, such as kombu dashi or shiitake dashi, miso soup can be easily prepared to suit a vegan diet.


Miso soup can be vegan-friendly when prepared with the right ingredients. Traditional miso paste, tofu, seaweed, and vegetables are all vegan, making them suitable for a vegan miso soup. However, it is essential to be cautious when ordering miso soup at restaurants or purchasing miso paste from stores, as they may contain non-vegan additives. By checking labels, inquiring about ingredients, or making miso soup at home, vegans can enjoy this flavorful and nutritious Japanese dish.