Miso the japanese soy paste + my miso course experience

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Updated: January 11, 2026
miso

Table of contents:

    Summary

    Miso is a traditional Japanese fermented soybean paste widely used in various dishes, particularly in soups and sauces like Miso Shiro and Miso Ramen. It comes in several types based on ingredients and fermentation duration, including Mamemiso, Kome Miso, and Mugimiso, each offering different flavors from mild to intense. Miso is known for its health benefits, containing proteins, vitamins, enzymes, and more, although pasteurization during processing can reduce its nutritional value. Engaging in a Miso-making course provides a unique opportunity to learn the labor-intensive process of crafting this flavorful paste, which requires patience as it takes several months to ferment and develop its taste. Participants are provided with all necessary ingredients and equipment, making it an accessible and enriching culinary experience.

    The fermented paste is used in many Japanese dishes. You can find it in soups, sauces or as a dip. Miso is especially versatile in soups, such as Miso Shiru or the well-known noodle soup Ramen. In Miso-Ramen, the broth is made from the soybean paste. But there are also many other types of ramen in which miso is used. The paste is also suitable as a dip. Due to its high salt content, miso is well preserved. That's why, when preparing Miso Shiru (miso soup), only a little of the salty paste is usually used.

    Dishes made with Miso

    Miso is incredibly versatile and plays a central role in Japanese cuisine. The most famous dish is probably Miso Shiru, the classic miso soup that is served at almost every Japanese breakfast. With tofu, wakame seaweed, and spring onions, it's a light yet nutritious way to start the day. For noodle lovers, Miso Ramen is a must: the broth gets its rich, savory flavor from a generous portion of miso paste, often combined with Dashi. You can find a simple recipe for Ramen on my blog.

    But miso is not limited to soups. Miso Kyuri is a refreshing side dish where cucumber sticks are served with a miso dip. If you like fish, try Salmon with Miso Butter, where the paste creates a wonderful umami glaze. Miso also works great in Nabe (Japanese hot pot), adding depth to the broth. Other classic dishes include Miso Dengaku (grilled tofu or eggplant with sweet miso glaze), Tonjiru (pork miso soup with vegetables), and Miso marinated grilled fish like Saikyo Yaki. If you're interested in Japanese fermentation, miso is a great starting point to explore this fascinating culinary tradition.

    Important Cooking Tip: Never Boil Miso!

    One of the most important things to know when cooking with miso: never let it boil! When preparing Miso Shiru or other dishes, always add the miso paste at the very end and remove the pot from the heat immediately. Boiling destroys both the delicate flavor and the valuable nutrients, especially the beneficial enzymes and probiotics in unpasteurized miso. Simply stir the paste into the warm (not boiling) liquid until it dissolves completely. This way, you get the full umami taste and all the health benefits.

    The Variations of Miso Paste

    Miso is divided into different categories according to its ingredients, color, and flavor. The base ingredient is always soybeans. With Mamemiso (豆味噌 = Bean Miso), only soybeans are used. In Komemiso (米味噌 = Rice Miso), rice is also added, and in Mugimiso (麦味噌 = Grain/Barley Miso), barley is used. There are also differences in color, which depends primarily on the duration of fermentation. You can store miso for several years, even decades. The only important thing is that the paste is stored airtight. One thing you should consider regarding storage time: the intensity of the flavor increases over the years.

    Types of Miso
    Types of Miso

    At the very beginning, the paste is white and is called Shiro-Miso (白味噌). You can still taste the soybeans, so it's rather neutral. The red miso is called Aka-Miso (赤味噌) and is in the middle range of fermentation. Miso with a very long fermentation period becomes much darker and develops a more intense flavor. A well-known example is Hatcho-Miso (八丁味噌) from Aichi, which is fermented for at least two years. There are also other flavor variations: spicy (Kara-Miso 辛味噌), sweet (Ama-Miso 甘味噌), and a mix of different types (Awase-Miso 合わせ味噌).

    How healthy is Miso?

    In general, miso, like all fermented foods, is very healthy. The paste contains vitamins and nutrients such as proteins, vitamin B2, vitamin E, various enzymes, isoflavones, choline, and lecithin. However, this only applies to fresh miso. Since the flavor changes continuously, the fresh variety is not suitable for supermarket sales. To prevent this, miso is usually pasteurized. After that, the miso paste no longer continues to ferment and retains the same taste. During pasteurization, the product is heated so much that many nutrients are lost. That's why you should rather choose the fresh variety. If you can get it, it's not exactly cheap. It also has a short shelf life. You have to use it up quickly, otherwise, after opening, there's a risk of mold. Or perhaps you want a stronger flavor on purpose.

    FAQ: Frequently Asked Questions about Miso

    Is miso vegan? Yes, miso itself is completely vegan as it consists only of soybeans, koji, salt, and sometimes rice or barley. However, be careful with ready-made miso products: some are specifically designed for Miso Shiru and already contain Dashi (fish stock). Always check the ingredients if you want a purely plant-based option.

    How long does opened miso last? Thanks to its high salt content, miso is extremely durable. You can store opened miso in the refrigerator for several months, sometimes even up to a year. Just make sure to always use a clean spoon and close the container tightly. If you notice mold on the surface, throw the miso away immediately.

    Can you freeze miso? Yes, you can freeze miso! Because miso contains very little water, it doesn't freeze rock hard and remains easy to portion even from the freezer. Freezing can extend the shelf life and, in the case of unpasteurized miso, almost completely stop the fermentation process. This is practical if you want to preserve a specific flavor intensity.

    A Workshop: Make your own Miso

    Koji Rice Molds
    Koji Rice Molds

    Cooking classes are quite normal in Japan. Even for school classes, they are offered as a nice change from daily lessons. Taking a miso workshop is definitely worthwhile, because the production of this popular paste is unknown to most people. You don't need to bring anything, as all ingredients and cooking utensils are provided. One thing to keep in mind: these workshops are usually held only in Japanese, so a basic understanding of the language or a translation app can be helpful.

    There's one thing you should know in advance: the workshop is hard work and you can't taste your cooking results straight away. You'll only be able to use your own miso paste after half a year or even a whole year.

    So, let's move on to the workshop. By hand, soybeans are mashed into a puree. You then form this into small balls and layer them in a bucket. Koji is added: these are molds that make the fermentation possible. Their work is only stopped when consumed or pasteurized. Then salt is added, an important ingredient for both flavor and preservation. Finally, the bucket is sealed.

    Miso Workshop Japan
    It was very exhausting ^^

    Now you have to be patient: you need to wait at least six months before you can try your miso paste. Until then it's stored in an underground storage shaft, where it always stays nice and cool.

    After the workshop, there is a short tour of the miso factory where miso is produced for sale. You can see the pastes at various stages of maturity. If you like, you can buy different miso products. These are more intense in flavor and more aromatic than what you find in supermarkets.

    Small miso factory behind the shop
    Small miso factory behind the shop

    My thoughts on the workshop:

    My verdict on the miso workshop
    My verdict on the miso workshop

    If you are interested in Japanese cuisine and get the chance to take part in such a miso workshop, you should definitely give it a try. I would never have thought there was so much work behind a seemingly ordinary product like miso. The most fun was learning about the different varieties and how they are classified. And most important for us: learning how to use miso in cooking to make it really delicious.

    Experience Miso in Tokyo with Me!

    If you're planning a trip to Japan and want to dive deep into the world of miso, I offer a Tokyo Miso Tour! Together we'll visit specialty miso shops, taste different varieties, and you can even make your own miso paste to take home. It's a hands-on experience where I share my knowledge about Japanese fermentation culture and help you discover authentic flavors beyond the tourist spots. Whether you're a miso beginner or already a fan, this half-day tour is perfect for anyone who wants to experience Japanese food culture up close.

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    Comments

    • Gast Logo Kilian - 10. March 2019 16:53

      Schöner article. I make my own miso because I can't find a decent one nearby. That's a whole different experience, where you really get to know the product and its versatility. I would recommend it to anyone who loves Japanese cuisine and amazing flavors.

      • RyuKoch Logo Ryusei von RyuKoch - 20. March 2019 05:48

        Hi Kilian, that sounds great, go ahead and post your successes on our Facebook page :) Best regards, Matthias

    • Gast Logo Birgit Saatkamp - 12. March 2019 09:21

      I came across your blog while searching for miso on Google – very inspiring :-) I just ordered your Korea book, I'm curious!

      • RyuKoch Logo Ryusei von RyuKoch - 11. April 2019 00:38

        Hello Birgit, that is great and makes us very happy, we put a lot of effort into it :) Thank you very much for the support. Best regards, Ryusei from RyuKoch

    • Gast Logo Klaus Schniering - 17. October 2019 19:45

      Sehr detailed article. But what happens to the lactic acid bacteria in miso when it is, for example, cooked in a soup? I’m really interested in the lactic acid bacteria, but if they are destroyed by heating, one of miso’s promised benefits is no longer present.

      • RyuKoch Logo Ryusei von RyuKoch - 04. November 2019 06:48

        Hallo Klaus,
        First of all, thank you very much, we put a lot of effort into it.
        The lactic acid bacteria are usually already gone. Just like with sauerkraut, miso is also pasteurized. That means it is heated strongly so that the fermentation does not continue. The advantage is that fermentation stops and the products all taste the same. Of course, the problem is that some vitamins and lactic acid bacteria are lost in the process.

        Suppose you have miso that hasn’t been pasteurized, then you should definitely add the miso last when making Miso Shiru (miso soup). It’s very important that the soup has not been boiling for several minutes already. That's because this way, the soup is no longer hotter than 70 degrees and the lactic acid bacteria and vitamins remain relatively intact. I generally recommend this approach, as the flavors also stay better in the soup than if you were to boil miso.
        Miso soup recipe: https://ryukoch.com/de/rezepte/miso-shiru/

        I hope this could help you :)

        Kind regards,
        Ryusei from RyuKoch

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