What to Know When Eating in Japan
**This page also serves as a personal reference and is updated from time to time.
In Japanese cuisine, ingredients and seasonings containing wheat may sometimes be found in foods where visitors might not expect them.
Gluten-free practices in Japan may differ from those in other countries, and definitions or expectations may vary depending on the region.
In Japan, the term “gluten-free” may be used in ways that differ from what visitors are accustomed to in their home countries.
Information regarding cross-contact, shared cooking equipment, ingredients, and preparation methods may not always be fully available or clearly communicated, so it is recommended to confirm directly when necessary.
Information about cross-contact, shared cooking equipment, ingredients, and preparation methods may not always be clearly available.If you have celiac disease, a wheat allergy, or require a strict gluten-free diet, it is recommended that you confirm the ingredients and preparation methods directly with the restaurant.
Hidden Sources of Wheat in Japanese Foods
This section provides examples of foods and seasonings in Japan that may contain wheat or whose ingredients may need to be confirmed.Japanese names are provided alongside the English names to help you check ingredient labels. Please note that the items listed here are only examples, and foods or seasonings not included in this list may also contain wheat or wheat-derived ingredients.
▼Ingredients That May Contain Wheat or Gluten
[Grains and Grain-Derived Ingredients]
- 小麦 (Wheat)
- 大麦 (Barley)
- ライ麦 (Rye）
- 押し麦 (Pearled barley / Rolled barley）
- もち麦 (Glutinous barley / Waxy barley）
[Wheat- and Gluten-Derived Ingredients]
- 小麦グルテン ( Wheat gluten）
- 小麦たん白/小麦蛋白/小麦タンパク/小麦たんぱく (Wheat protein）
- セイタン (Seitan/gluten meat）
- パン粉 Breadcrumbs (made from wheat bread)
[Seasonings and Fermented Seasonings]
- 醤油 Soy sauce (traditionally contains wheat in Japan)
- 麦芽 (Malt )
- 麦芽エキス Malt extract (usually from barley)
▼ Ingredients That May Require Confirmation of Their Source
The ingredients listed below are not necessarily derived from wheat. They may be made from a variety of sources, including soybeans, corn, milk, yeast, meat, or fish. If you require strict gluten avoidance, you may wish to check whether the label indicates "contains wheat" or confirm the source of the ingredient when necessary.
[Sugars and Sweeteners]* Ingredients and manufacturing methods may vary by product. When necessary, please check the ingredient label.
- 麦芽糖 (Maltose)
- 麦芽飴 (Malt syrup / Malt extract syrup）
- 水あめ/水飴/水アメ (Starch syrup/glucose syrup )
- ブドウ糖液糖 (glucose syrup)
- 米あめ/ もち米あめ (Rice syrup / Glutinous rice syrup）
[Processed Protein Ingredients]
- たん白加水分解物/蛋白加水分解物 (Hydrolyzed protein)
- 植物性たん白加水分解物/植物性蛋白加水分解物 ( Hydrolyzed vegetable protein (HVP))
- 植物性たん白/植物性蛋白/植物性タンパク (Vegetable protein)
[Starch-Derived Ingredients and Sweeteners]
- デキストリン (Dextrin)
- 加工でん粉/加工澱粉/加工デンプン (Modified starch (source should be confirmed))
[Food Additives and Seasonings]
- 調味料・調味料 (アミノ酸等））（Seasoning / Seasonings）
- 香料 (Flavoring / Natural flavoring)
- 増粘剤 (Thickener)】
[Other Ingredients]
- Oats (オーツ麦）
Oats do not naturally contain gluten. However, cross-contact may occur during harvesting, transportation, processing, or manufacturing.
Examples of Common Foods
This section provides examples of dishes commonly served at restaurants in Japan that may contain wheat. Please note that foods and dishes not listed here may also contain wheat or wheat-derived ingredients. If you have a wheat allergy, celiac disease, or require a strict gluten-free diet, please confirm the ingredients and preparation methods directly with the restaurant staff before ordering.
| ▼Seasonings/Sauces | |
| お醤油 (Soy sauce) | Soy sauce is widely used in Japanese cuisine and seasonings. |
| 味噌 (Miso) | Commonly used in many Japanese dishes and seasonings. |
| 穀物酢 (Grain vinegar) | The source ingredients vary by product. Confirmation may be necessary. |
| 出汁( だし ) (Soup stock) | May contain soy sauce or other seasonings containing wheat. |
| ラーメンのスープ (Ramen soup) | The ingredients used in the soup, seasoning sauce, and noodles vary by restaurant and product. |
| カレールウ (Curry roux) | Wheat flour is commonly used. |
| シチュー (Stew roux) | Wheat flour is commonly used. |
| ウスターソース / とんかつソース (Worcestershire sauce / Tonkatsu sauce) | May contain wheat-containing ingredients. |
| ポン酢 (Ponzu sauce) | Soy sauce is commonly used. |
| めんつゆ / 白だし (Noodle soup base / White dashi) | Soy sauce is commonly used. |
| 焼き肉のたれ (Barbecue sauce) | May contain soy sauce and other wheat-containing ingredients. |
| オイスターソース (Oyster sauce) | Some products may contain wheat-containing ingredients. |
| ソース / ドレッシング (Salad dressings) | Some products may contain soy sauce or other wheat-containing ingredients. |
| ▼Processed foods and prepared foods | |
| 天ぷらの衣 (Tempura batter) | Usually made with wheat flour. |
| かまぼこ・ちくわなどの練り物 (Fish cakes (kamaboko, chikuwa, and other surimi products)) | Wheat may be used as a binder. |
| さつま揚げ (Satsuma-age (fried fish cake)) | Wheat may be used as a binder. |
| ハム /ソーセージ (Ham / sausages) | Wheat may be included as a binder or in food additives. |
| カニかまぼこ (Imitation crab (kanikama)) | May contain wheat in starch or food additives. |
| コロッケ・唐揚げなどのお惣菜 Prepared foods such as croquettes and Japanese fried chicken (karaage) | Often coated with wheat flour; cross-contact (contamination) may also occur due to shared frying oil. |
| 餃子の皮 (Gyoza wrappers) | Usually made primarily from wheat flour. |
| ▼Snacks and Desserts | |
| せんべい (Rice crackers (senbei)) | Soy sauce-flavored varieties may contain wheat. |
| アイスクリーム (Ice cream) | Some products may contain wheat in additives or flavorings. |
| チョコレート (Chocolate) | Some products may contain wheat in additives or flavorings. |
| スナック菓子 (Snack foods / Snack chips) | Some products may contain wheat-containing ingredients or seasonings. |
| ▼ Beverages | |
| 麦茶 (Barley tea) | Made from barley. Those requiring strict gluten avoidance may wish to confirm whether it is suitable for their needs. |
| 一部のビール/ 発泡酒 (Some beers and happoshu (low-malt beer)) | Some products are made with malt or wheat. |
| ▼Restaurant menu items | |
| 寿司 (Sushi) | Rice vinegar is commonly used, but the vinegar and seasonings may vary by restaurant and product. Soy sauce commonly contains wheat. |
| 焼肉 (Yakiniku) | Marinades and dipping sauces commonly contain soy sauce and other wheat-containing ingredients. |
| お好み焼き/ たこ焼き/ もんじゃ (Okonomiyaki / Takoyaki / monjayaki) | Typically made mainly from wheat flour. |
| うどん / そば (Udon / Soba) | Udon is primarily made from wheat. Even 100% buckwheat soba may be prepared using shared equipment or boiling water. Soy sauce may also be used in the broth and dipping sauce. |
| 揚げ物全般 (Deep-fried foods) | Cross-contact may occur when frying oil is shared with other foods. |
Things to Watch Out for in Japan
1. "Gluten-free" may not always be understood
In Japan, understanding of gluten-free diets and celiac disease varies from restaurant to restaurant. Simply saying "I have celiac disease" may not fully explain your dietary needs.
In such situations, simply saying, "I cannot eat wheat," may help communicate your needs more clearly.
Of course, this does not fully explain your medical condition, but it may help communicate that you need to avoid wheat.
2. Restaurant menus may not include detailed ingredient information
Packaged foods sold at supermarkets and convenience stores in Japan often include allergen and ingredient information. However, restaurant menus may not always provide detailed ingredient information.
In some cases, restaurant staff may not be able to confirm every ingredient used. If you have any concerns, we recommend asking the restaurant directly about the ingredients and how the food is prepared.
3. About Cross-Contact
Food preparation methods vary from restaurant to restaurant in Japan. Some restaurants may use preparation methods like those listed below. If you have any concerns, we recommend asking the restaurant directly about the ingredients and how the food is prepared.
• Using the same frying oil for different foods
• Boiling different noodles or foods in the same • water
• Using shared cooking equipment and preparation areas
4. Examples of Foods That May Be Easier to Choose
The following foods may sometimes be easier options, but it is still recommended to confirm the ingredients and preparation methods before ordering.
• Plain white rice or brown rice
• Sashimi or natto (check the soy sauce and accompanying sauce)
• Salt-grilled fish without sauce
• Edamame
• Simply seasoned pickles
• Gluten-free specialty restaurants or natural food restaurants researched in advance
When choosing a menu item, please check the ingredients and preparation method if needed.
5. Helpful Tools and Apps
The following tools may be helpful during your trip:
• Allergy card apps (some support multiple languages)
•Translation apps
• AI chat tools
• A written allergy or dietary restriction card
[Examples]
"I cannot eat wheat or gluten. Does this contain wheat?"
"I have a wheat allergy. Do you have anything without wheat?"
Showing a written card may help communicate your dietary needs more easily when there is a language barrier.
(June 2026)
