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Does Japanese food contain fish? Dashi, fish allergy and vegetarian tips
A quiet fact about Japanese cooking: dashi, the stock behind miso soup, noodle broth, simmered dishes and egg rolls, is usually made from fish. It is invisible on the plate, and it affects both people with fish allergies and vegetarians.
Quick answer: Dashi usually means かつお節 (katsuobushi, dried bonito) or 煮干し (niboshi, dried sardines). Say 魚アレルギーです (sakana arerugii desu) and ask だしは何ですか？ (dashi wa nan desu ka?).
Where dashi and fish hide
- Soups and broths: miso soup, udon and soba broth, oden, ramen broth.
- Egg dishes: dashimaki tamago (rolled omelet) and chawanmushi.
- Toppings: bonito flakes (かつお節) dance on top of takoyaki, okonomiyaki, tofu and spinach ohitashi.
- Seasonings: hondashi (ほんだし, instant dashi), furikake rice sprinkles, mentsuyu and some curry or sauce.
- Onigiri fillings such as 鮭 (shake, salmon) and ツナ (tsuna, tuna mayo).
If you have a fish allergy
Fish is not on Japan’s mandatory allergen list, though salmon (さけ) and mackerel (さば) are on the recommended list, so labeling is incomplete. Ask whether the broth uses katsuo or niboshi, and use the card. Some people tolerate dashi and some do not, which is a question for your allergist. Shellfish is a different group; see our shellfish phrases.
If you are vegetarian or vegan
This is not an allergy, but the fix is similar. Ask for 魚だし抜き (sakana dashi nuki, without fish stock). Kombu (昆布) and shiitake dashi are plant-based, and temple cooking (精進料理, shoujin ryouri) is fully vegetarian. Soy is everywhere, so see the soy guide if that also applies. At ryokan breakfasts and hotel buffets, simple vegetable dishes and rice are usually safe, while grilled fish, pickles with dried bonito and egg rolls are not. Tell the staff when you book, because dinner at a ryokan is often fixed and prepared in advance. Giving them 48 hours’ notice makes a plant-based or fish-free meal far more realistic.
Fish and dashi phrases in Japanese
| Japanese (kana) | Romaji | English |
|---|---|---|
| だし | dashi | Japanese stock |
| かつおぶし（かつお節） | katsuobushi | dried bonito flakes |
| にぼし（煮干し） | niboshi | dried sardines |
| こんぶ（昆布） | kombu | kelp (plant-based) |
| さかな（魚） | sakana | fish |
| さかなアレルギーです（魚アレルギー） | sakana arerugii desu | I have a fish allergy |
| だしは何ですか？ | dashi wa nan desu ka? | What is the stock made from? |
| かつおだしは入っていますか？ | katsuo dashi wa haitte imasu ka? | Does it contain bonito stock? |
| さかなだしぬきでおねがいします（魚だし抜き） | sakana dashi nuki de onegai shimasu | Without fish stock, please |
| ベジタリアンです | bejitarian desu | I’m vegetarian |
Printable fish allergy card
This card covers fish and bonito stock. Cross out “fish” and keep the stock line if you only avoid dashi.
私は魚（かつおだしを含む）アレルギーです。
I am allergic to fish (including bonito stock).
魚（かつおだしを含む）が入っている料理は食べられません。
I cannot eat any dish that contains fish (including bonito stock).
だしやソース、調味料、揚げ油にも入っていないか、ご確認をお願いします。
Please also check the stock, sauces, seasonings and frying oil.
魚（かつおだしを含む）に触れた調理器具や油は使わないでください。
Please do not use utensils or oil that have touched fish (including bonito stock).
少量でも命に関わります。
Even a small amount can be life-threatening.
ご協力ありがとうございます。 Thank you for your help. · japanmust.com
Printing tip: set the page to “fit to page”, or take a screenshot and show it on your phone. Delete the last line if your allergy is not severe.
Allergy safety: this is travel information, not medical advice. Restaurants often cannot guarantee an allergen-free meal, and cross-contact in kitchens is common. Carry any prescribed medication and a doctor’s letter, and check current Japanese rules for bringing medicine into the country.
Frequently asked questions
Is miso soup vegetarian in Japan?
Usually not. Miso soup is typically made with fish-based dashi. Ask for 魚だし抜き, or look for kombu-based versions.
Is dashi always fish?
No. Kombu (kelp) and shiitake dashi are plant-based, but fish-based katsuo and niboshi stock is the default in most restaurants.
Is fish labeled as an allergen on packaged food?
Not as a general category. Some fish, such as salmon and mackerel, are on the recommended list, so read ingredient lists for 魚 and 〜エキス (extracts).
Are bonito flakes on takoyaki or okonomiyaki?
Yes, by default. Ask for かつお節ぬき (katsuobushi nuki) if you want them left off.
Related guides
Find fish stock before it finds you
Japan Interpreter explains what is in a dish from a photo of the menu, including words like だし and かつお.
Japan Interpreter: offline camera and text translation for Japan. Allergen flags help, but never replace asking the restaurant.