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Gluten-free in Japan: what to know and a card to show
Japan is rice country, which sounds ideal, but wheat hides in the seasoning. Soy sauce contains wheat, miso can contain barley, and gluten-free awareness is still limited outside big cities. With the right words and a card you can eat well.
Quick answer: Soy sauce, tempura batter, ramen, udon, gyoza wrappers and curry roux all contain wheat. Show the card, say 小麦 (komugi, wheat), 大麦 (oomugi, barley) and ライ麦 (raimugi, rye), and prefer simple salted or plain dishes.
The seasoning problem
Even a “plain” dish may not be gluten-free because of what is poured on it. Watch for:
- Soy sauce (醤油, shouyu), made from soybeans and wheat. It is in dipping sauces, glazes, broths and pickles.
- Miso. Some types use barley (麦味噌, mugi miso).
- Barley tea (麦茶, mugicha), the free tea served cold in summer.
- Yakitori tare and teriyaki glazes, which contain soy sauce.
- Panko, tempura flour, okonomiyaki and takoyaki batter, all wheat flour.
What is usually safer
Plain rice (ごはん), salt-grilled fish (塩焼き, shioyaki), plain sashimi without soy sauce, and shio (salt) yakitori are the easiest choices, though shared grills mean cross-contact is possible. Soba is not automatically safe: nihachi soba (二八そば) is 20% wheat, and even 100% buckwheat (十割そば, juuwari) is cooked in shared water. Sake is made from rice, while beer is not. Some travelers carry a small bottle of gluten-free tamari for sashimi.
Labels and how to ask
Japanese allergen labels declare 小麦 (wheat). Barley and rye are not on the mandatory list, so they may only appear in the ingredient list. Look for 大麦, ライ麦 and 麦芽 (bakuga, malt). In restaurants, name all three grains and add “celiac disease” if you have it: セリアック病 (seriakku-byou). Our label guide covers packaged food, and the soy guide explains how deep soy sauce runs.
Gluten-free phrases in Japanese
| Japanese (kana) | Romaji | English |
|---|---|---|
| グルテンフリー | gurutenfurii | gluten-free |
| こむぎ（小麦） | komugi | wheat |
| おおむぎ（大麦） | oomugi | barley |
| ライむぎ（ライ麦） | raimugi | rye |
| セリアックびょうです（セリアック病） | seriakku-byou desu | I have celiac disease |
| こむぎは食べられません | komugi wa taberaremasen | I can’t eat wheat |
| しょうゆにも小麦が入っていますか？（醤油） | shouyu ni mo komugi ga haitte imasu ka? | Is there wheat in the soy sauce too? |
| こむぎこ（小麦粉） | komugiko | wheat flour |
| こめこ（米粉） | komeko | rice flour |
| しおだけでおねがいします（塩だけで） | shio dake de onegai shimasu | Just salt, please |
Printable gluten-free card
The card names wheat, barley and rye. Add the line about celiac disease by hand if it applies.
私はグルテン（小麦・大麦・ライ麦）アレルギーです。
I am allergic to gluten (wheat, barley and rye).
グルテン（小麦・大麦・ライ麦）が入っている料理は食べられません。
I cannot eat any dish that contains gluten (wheat, barley and rye).
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.
グルテン（小麦・大麦・ライ麦）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 gluten (wheat, barley and rye).
私はセリアック病です。
I have celiac disease.
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 Japanese soy sauce gluten-free?
No. Standard Japanese soy sauce is brewed from soybeans and wheat. Tamari can contain little or no wheat, but check the label for 小麦不使用 (komugi fushiyou, wheat-free).
Is soba gluten-free in Japan?
Usually not. Common soba blends buckwheat with wheat, and even 100% soba is boiled in shared water. See our soba allergy page for buckwheat issues.
Can I find gluten-free ramen?
A growing number of shops in Tokyo, Kyoto and Osaka advertise rice-noodle or gluten-free bowls, but the broth and tare still need checking. Search ahead and confirm by showing the card.
Is rice flour safe?
Rice flour (米粉) itself is gluten-free, but check whether the shop mixes it with wheat flour or fries in shared oil.
Related guides
Spot wheat words on any menu
Japan Interpreter translates menu text on your phone with no signal, so you can look for 小麦, 醤油 and 天ぷら before you order.
Japan Interpreter: offline camera and text translation for Japan. Allergen flags help, but never replace asking the restaurant.