Can You Eat Gluten-Free in Japan?
Yes, with planning. Packaged food must show wheat (小麦) as an allergen, so supermarket and convenience-store labels are a useful first check. Three things catch out people with celiac disease: regular soy sauce is brewed with wheat and goes into most dishes; barley (大麦) and rye do not have to be labelled at all; and restaurants are not legally required to tell you about allergens. Read 小麦 and 大麦 on every pack, ask before ordering, and carry a card in Japanese.
What Japanese Food Labels Tell You, and What They Do Not
Japan's Consumer Affairs Agency (CAA) lists 9 mandatory allergens, and wheat is one of them (CAA list, April 2026). On packaged food it must be named whenever the product contains it at a level of a few micrograms of wheat protein per gram, which CAA describes as "several ppm" (CAA notice). The label rules have gaps that matter for a gluten-free diet:
- Barley and ryeNot covered. CAA's Q&A says barley (大麦) and rye (ライ麦) are outside the allergen rules and do not need to be labelled (CAA Q&A). Oats are not on the list either.
- "May contain"Not allowed. A label cannot just say an allergen "might be in it". Makers may add factory notes instead, such as 本品製造工場では小麦を含む製品を生産しています ("this factory also makes products containing wheat") (CAA notice).
- "Not used" is not "not present". CAA's Q&A says a 使用していない ("not used") claim does not necessarily mean the food contains none (CAA Q&A).
- Unpackaged foodOften no label. Food sold loose, or made and sold in the same shop, does not need an allergen label (CAA Q&A).
"Gluten-Free" in Japan Is Not the EU or US Standard
In the EU and US, "gluten-free" means 20 ppm of gluten or less. CAA points out that this foreign gluten-free labelling and Japan's allergen labelling use different standards, and warns makers that putting グルテンフリー on food that still contains wheat may break the law on misleading claims (CAA leaflet). Treat a グルテンフリー sticker as a starting point, then check the allergen line yourself.
Japan has its own stricter mark for rice flour. Rice flour certified as ノングルテン ("non-gluten") contains 1 ppm of gluten or less (MAFF). That covers the flour only: CAA notes that rice-flour bread and similar products sometimes use wheat gluten, so read the label on anything made from it.
Eating Out: Restaurants Do Not Have to Label Allergens
Allergen labelling is mandatory only for packaged food. CAA's Q&A says restaurants and take-out are currently not required to provide allergen information, while encouraging them to do so voluntarily (CAA). Some large chains publish allergen charts online; small restaurants rarely do.
JNTO's advice for travellers with dietary requirements is to carry a written explanation in Japanese and to tell restaurants about your needs when you book (JNTO). For gluten, that card needs to mention soy sauce by name — staff who know a dish has no noodles or bread may not think of the soy sauce in it.
- Book ahead and send your needs in writing. A message in Japanese gives the kitchen time to plan.
- Show the card before you order. Ask staff to show it to the kitchen.
- Ask about shared oil and water. Tempura oil and noodle cooking water are often shared.
- Bring your own soy sauce. Wheat-free soy sauces are sold in Japan (for example Ichibiki's wheat-free soy sauce, made from soybeans and salt); a small bottle covers sushi and sashimi.
Japanese Words to Look For
Learn these words before you shop. On packs, the allergen line usually starts with （一部に … を含む）, "contains some …".
Before You Go: Checklist
Sort these at home:
- Make a card in Japanese. It should say you cannot eat wheat or gluten, and name soy sauce.
- Pack wheat-free soy sauce. Or buy it on arrival and carry a small bottle.
- Save the words 小麦 and 大麦. Check both on every pack, not only the allergen line.
- Look up chain allergen charts. Large chains often publish them online; small restaurants rarely do.
- Book with a written note. Send your requirements in Japanese when you reserve.
Frequently asked questions
Is Japan gluten-free friendly?
It takes planning. Wheat must be labelled on packaged food, but soy sauce made with wheat is in most dishes, barley does not have to be labelled, and restaurants are not required to give allergen information. A card in Japanese and your own wheat-free soy sauce help most.
Is soy sauce gluten-free in Japan?
Regular Japanese soy sauce is not: it is brewed from soybeans and wheat. Tamari is mostly soybean but can contain some grain. Wheat-free soy sauces are sold in Japan; check that the label shows no 小麦.
Does a Japanese label without 小麦 mean the food is gluten-free?
No. Barley (大麦) and rye are outside Japan’s allergen labelling rules, so read the full ingredients list. And a "not used" (使用していない) claim does not guarantee the food contains none.
Is soba gluten-free?
Usually not. Most soba is made with a binder such as wheat flour. Even 100% buckwheat soba may be cooked in water shared with wheat noodles, and soba dipping sauce is made with soy sauce.
Is barley tea (mugicha) gluten-free?
No. Mugicha is made from barley, which contains gluten, and it is often served free with meals. Barley is not a labelled allergen in Japan, so ask for water or green tea instead.
What does ノングルテン mean on Japanese rice flour?
It is a Japanese certification for rice flour with 1 ppm of gluten or less, stricter than the EU/US 20 ppm gluten-free rule. It applies to the flour; products made from it can still contain wheat, so check their labels.
Sources
- Consumer Affairs Agency — Allergen list (9 mandatory + 20 recommended, April 2026) (PDF) (Japanese)Wheat is a mandatory allergen
- Consumer Affairs Agency — Food labelling standards notice (PDF) (Japanese)Several-ppm threshold; "may contain" not allowed; factory notes; restaurants not covered
- Consumer Affairs Agency — Food labelling Q&A (PDF) (Japanese)Barley and rye not covered; "not used" is not "not contained"; unpackaged food
- Consumer Affairs Agency — Gluten-free labelling leaflet (PDF) (Japanese)EU/US gluten-free vs Japanese allergen labelling
- Consumer Affairs Agency — Allergen information when eating out (Japanese)Restaurants and take-out: voluntary information
- Food Labelling Standards (e-Gov) (Japanese)Barley miso, rice vinegar, dried soba ratio
- MAFF — JAS standard for soy sauce (PDF) (Japanese)Koikuchi, tamari and white soy sauce ingredients
- Japan Soy Sauce Brewers Association — Ingredients FAQ (Japanese)Soy sauce is made from soybeans, wheat and salt
- MAFF — Non-gluten rice flour (Japanese)Non-gluten rice flour: 1 ppm or less
- MAFF — Traditional foods: soba (Japanese)Soba binder such as wheat flour
- National Barley Tea Industry Cooperative — Q&A (Japanese)Barley tea is made from barley
- Ichibiki — Soy sauce made without wheat (maker page) (Japanese)Example of a wheat-free soy sauce
- JNTO — Vegetarian and dietary requirements guideCarry a written card; tell restaurants when booking
Sources checked: October 4, 2026
Researched and fact-checked by the TravelSafe Japan team against the sources above. AI tools helped with drafting; every rule, number and date was checked by an editor. General information, not legal or medical advice. Spotted an error? Tell us · How we verify