Traveling to Japan with food allergies requires preparation. Japan's food labeling system is thorough by global standards, but it operates in Japanese — and the gap between understanding a label in English and reading one in kanji under time pressure is significant.
This guide explains how Japan's allergen disclosure system works, what you need to know about each major allergen category, and how to navigate restaurants, konbinis, and supermarkets safely.
Japan's Allergen Labeling System
Japan uses a tiered allergen disclosure system under the Food Labeling Standards (食品表示基準) regulated by the Consumer Affairs Agency.
The 8 Mandatory Allergens (特定原材料)
Manufacturers are legally required to declare these 8 allergens on all packaged foods:
| Japanese | Reading | Allergen |
|---|---|---|
| 卵 | tamago | Egg |
| 乳 | nyū | Milk / Dairy |
| 小麦 | komugi | Wheat |
| そば | soba | Buckwheat |
| 落花生 | rakkasei | Peanut |
| えび | ebi | Shrimp / Prawn |
| かに | kani | Crab |
| くるみ | kurumi | Walnut (added 2023) |
These must appear on the label — either within the ingredient list inline or in a separate 特定原材料 summary section.
The 20 Recommended Allergens (特定原材料に準ずるもの)
These 20 allergens are not legally mandatory but are officially recommended by the government, and most reputable manufacturers disclose them voluntarily:
Abalone (あわび), Squid (いか), Salmon roe (いくら), Orange (オレンジ), Cashew nut (カシューナッツ), Kiwi (キウイフルーツ), Beef (牛肉), Sesame (ごま), Salmon (さけ), Mackerel (さば), Soy (大豆), Chicken (鶏肉), Banana (バナナ), Pork (豚肉), Matsutake mushroom (まつたけ), Peach (もも), Yam (やまいも), Apple (りんご), Gelatin (ゼラチン), Almond (アーモンド)
How to Read Allergen Declarations on Japanese Packaging
Japanese labels declare allergens in two places:
1. Inline in the Ingredient List (原材料名)
Allergens are written in parentheses after the ingredient they come from. For example:
醤油（小麦・大豆を含む）
This means: "Soy sauce (contains wheat and soy)"
2. Separate Allergen Summary (一部に〜を含む)
At the end of the ingredient section, you may see a consolidated summary such as:
一部に卵・乳成分・小麦・えび・かにを含む
This means: "Contains egg, milk, wheat, shrimp, and crab"
Both formats are legal, and some products use both. Always check both sections.
Trace Contamination (コンタミネーション)
Some products include voluntary warnings such as:
本製品の製造工場では、落花生を含む製品を製造しています
Translation: "This product is manufactured in a facility that also produces products containing peanuts."
This is equivalent to a "may contain" warning and is especially relevant for peanut and tree nut allergies.
The Most Dangerous Allergens to Watch in Japan
Egg (卵)
Ubiquitous in Japanese cooking. Found in most tamagoyaki, many sauces (mayonnaise is used pervasively in konbini sandwiches and salads), pasta dishes, tempura batter, and most baked goods. Japanese mayo (Kewpie-style) is egg-yolk only and used heavily.
Wheat (小麦)
Present in soy sauce (醤油 is made from wheat and soybeans unless specified gluten-free), most ramen, udon, soba (often uses wheat flour mixed with buckwheat), tempura batter, many dressings, and seasonings. Tamari-style soy sauce (たまり醤油) is typically wheat-free.
Milk / Dairy (乳)
Found in many breads, pastries, canned coffee drinks, ice cream, some crackers, and processed foods. "乳成分" means "milk component" — this is the key phrase to watch.
Shrimp (えび) and Crab (かに)
Extremely common in Japanese cuisine — in sushi, tempura, sauces, many instant noodles, and flavored snacks. Cross-contamination risk is very high in seafood-heavy kitchens.
Buckwheat (そば)
Soba noodles are made primarily from buckwheat. However, many soba restaurants also cook udon (wheat) and ramen in shared water, creating significant cross-contamination risk. For severe buckwheat allergies, dedicated buckwheat-free restaurants are safer.
Sesame (ごま)
Sesame oil and seeds appear in many Japanese dressings, marinades, and side dishes. Though only a recommended allergen (not mandatory), it is widely disclosed. Ramen toppings and gyoza dipping sauces frequently contain sesame oil.
Soy (大豆)
Soy is fundamental to Japanese cuisine — soy sauce, miso, tofu, edamame, natto. For severe soy allergies, Japan presents significant challenges. Look for 大豆 in ingredient lists.
Communicating Your Allergy at Restaurants
The language barrier is the most significant risk factor for travelers with serious food allergies in Japan. Staff at chain restaurants often cannot improvise — they follow standardized recipes. Smaller independent restaurants may be more flexible but may also have less labeling knowledge.
Essential phrases to write on a card or save on your phone:
| Allergy | Japanese phrase |
|---|---|
| I have a [food] allergy | 〇〇アレルギーがあります |
| Does this contain [food]? | これに〇〇は入っていますか？ |
| It is life-threatening | 命に関わります |
| I cannot eat any dishes containing [food] | 〇〇が入っている料理は食べられません |
| Please check with the kitchen | キッチンに確認していただけますか？ |
Food-specific terms:
| Allergen | Japanese to use |
|---|---|
| Egg | 卵（たまご） |
| Milk/Dairy | 乳製品（にゅうせいひん） |
| Wheat / Gluten | 小麦（こむぎ）/ グルテン |
| Peanut | 落花生（らっかせい）/ ピーナッツ |
| Shrimp | えび |
| Crab | かに |
| Sesame | ごま |
| Soy | 大豆（だいず）/ 大豆製品 |
| Fish | 魚（さかな） |
| Tree nuts | ナッツ類 |
Allergy translation cards (アレルギー表示カード) are available from several travel organizations and apps. Carrying a printed card with your specific allergens listed in Japanese is strongly recommended for severe allergies.
Safe Shopping Strategies
At Konbinis (Convenience Stores)
Konbini chains publish full allergen tables for all their products on their websites and apps. The major chains — 7-Eleven Japan, Lawson, and FamilyMart — all maintain allergen databases that staff can access.
For packaged items with labels, AI scanner apps like Okaasan can analyze the allergen section in seconds and alert you to any of your flagged allergens.
At Supermarkets
Most supermarkets stock both pre-packaged items with full labels and deli/prepared food sections without individual ingredient labels. Pre-packaged items are safer for allergy management. Avoid deli counters and hot food stations unless you can communicate directly with staff.
At Vending Machines
Bottled and canned drinks are generally lower-risk for most allergies. Milk-based coffees and teas (canned café au lait, milk tea) obviously contain dairy. Some flavored drinks contain peach, banana, or kiwi extracts.
How AI Scanners Protect Allergy Travelers
Manually reading a Japanese ingredient list takes significant time and Japanese literacy. An AI food scanner app like Okaasan can:
- Instantly flag your specific allergens — set your personal allergen profile and get visual alerts when any are detected
- Detect hidden derivatives — identify "bonito extract" as a fish-derived ingredient, "casein" as a milk protein, or "L-cysteine" as a potentially animal-derived additive
- Translate the full ingredient list — so you can cross-check the AI analysis yourself
- Cover all 28 allergen categories — including both the 8 mandatory and 20 recommended allergens
- Save your scan history — build a list of safe products to reference throughout your trip
Emergency Information for Severe Allergy Travelers
If you are traveling with a severe, potentially anaphylactic allergy:
- Carry two epinephrine auto-injectors (EpiPens). Japan's emergency services are excellent but response times outside major cities can exceed 10 minutes.
- Inform your accommodation about your allergy when checking in. Many hotels can provide allergy information for their restaurants.
- Know the Japanese for anaphylaxis: アナフィラキシー (anafirakishii). In an emergency, saying this to a pharmacist or medical professional will be understood immediately.
- Japan's emergency number is 119 (ambulance and fire). For police: 110.
- Download a medical translation app or carry a medical alert card in Japanese stating your allergy and the action required.
Frequently Asked Questions
Is Japan safe for people with severe food allergies?
Japan has one of the most rigorous food labeling systems in Asia. Packaged foods have mandatory allergen disclosure. The main challenge is restaurants, where cross-contamination is common and communication can be difficult without Japanese language skills. With preparation and the right tools, most travelers with allergies navigate Japan successfully.
Can I trust the allergen labels on Japanese packaging?
Yes — Japanese food labeling standards are enforced by the Consumer Affairs Agency. Mandatory allergen disclosure violations carry penalties. However, voluntary allergens (the 20 recommended ones) are not legally required, so a product that does not list them may still contain them at trace levels.
What should I do if I accidentally consume an allergen in Japan?
Seek medical attention immediately for severe reactions. Call 119 for an ambulance. For mild reactions, pharmacies (薬局) stock antihistamines. Major hospitals in Tokyo, Osaka, and Kyoto have English-speaking staff or medical interpreters available.
Does Japan have dedicated gluten-free products?
Yes, though the range is smaller than in Europe or North America. Major supermarkets carry gluten-free soy sauce (グルテンフリー醤油 or たまり醤油), rice-based snacks, and some certified gluten-free products. Dedicated gluten-free sections are most common in international supermarkets and health food stores in major cities.
Is buckwheat cross-contamination a risk at soba restaurants?
Yes. Most soba restaurants cook wheat noodles in the same water or on the same surfaces as soba. For severe buckwheat allergies, avoid all soba restaurants. For mild sensitivities, some restaurants offer dedicated buckwheat-only cooking setups — ask specifically about cross-contamination before ordering.