Food Allergies in Japan: Communication Cards and Cross-Contamination Risk

Food allergy travel in Japan rewards preparation more than caution alone. Packaged food carries one of the strictest allergen-labeling systems in the world, yet restaurant meals sit outside that system entirely.¹

The gap between the packet and the plate is what catches visitors. This article explains what labels tell you, how to bridge the restaurant gap with a written Japanese card, and where cross-contamination hides.¹

Confirm current details with official sources

Fees, rules, and requirements can change. Confirm current details at the Consumer Affairs Agency. This article is general information, not medical advice; for your specific situation, consult a licensed physician.

Overview

Japan's allergen rules split into two worlds. Factory-sealed food must declare a fixed list of allergens by law, and restaurant food carries no equivalent obligation.¹

That split shapes every decision below. Use labels where they exist, use a communication card where they do not, and keep a verifiable fallback meal in mind for the moments when neither works.²

This article covers labeling literacy, the card workflow, kitchen norms, and emergency pointers. It gives no clinical guidance; severity assessment and medication planning belong with your own physician.¹

Allergen Labeling: What Packaged Food Tells You

Japan requires packaged processed food to declare 9 mandatory allergens: egg, milk, wheat, buckwheat, peanut, shrimp, crab, walnut, and cashew nut (as of 2026-04; confirm current figures with the Consumer Affairs Agency).¹³

Cashew nut is the newest addition. It became mandatory on 2026-04-01 under Cabinet Office Ordinance No. 34, with a transition period running to 2028-03-31, so some stock on shelves may not yet name it (as of 2026-04).³⁴

Walnut took the same path earlier. It became mandatory in 2023 with a grace period that ended in March 2025 (as of 2025-03).⁴ Egg, milk, wheat, buckwheat, and peanut have been mandatory since 2002, with shrimp and crab joining in 2008.¹

Allergen	Japanese	Mandatory since	As of	Source
Egg	卵 (tamago, "egg")	2002	2026-04	1
Milk	乳 (nyuu, "milk; dairy")	2002	2026-04	1
Wheat	小麦 (komugi, "wheat")	2002	2026-04	1
Buckwheat	そば (soba, "buckwheat; buckwheat noodles")	2002	2026-04	1
Peanut	落花生 (rakkasei, "peanut")	2002	2026-04	1
Shrimp	えび (ebi, "shrimp")	2008	2026-04	1
Crab	かに (kani, "crab")	2008	2026-04	1
Walnut	くるみ (kurumi, "walnut")	2023	2026-04	1
Cashew nut	カシューナッツ (kashuu nattsu, "cashew nut")	April 2026	2026-04	13

Below the mandatory list sits a recommended tier of roughly 20 further allergens that makers are urged but not legally required to declare. It includes soybeans (大豆, daizu, "soybean; soy") and sesame (ごま, goma, "sesame"), plus items such as almonds, pork, chicken, beef, salmon, mackerel, and gelatin, with pistachio added in April 2026 (as of 2026-04).¹³

Soy and sesame can legally be missing from a label

Soy and sesame sit on the voluntary tier in Japan, the reverse of the United States and the European Union where both are mandatory. Most large makers label them anyway, but a smaller producer may lawfully leave them off.¹

Japan declares a mandatory allergen present above 10 parts per million, including presence through cross-contamination. Western-style vague "may contain" warnings are not part of the framework, though some makers add production-line statements in plain prose that are easy to overlook.¹

All mandatory label information must be written in Japanese. On bilingual packaging, the Japanese-language portion is the legally operative one.⁵⁶

Reading a Convenience Store or Supermarket Label

Find the 原材料名 (genzairyou-mei, "ingredient name header on packaged food") block on the back of the package. Allergens appear either in parentheses after individual ingredients or gathered into a collective summary line reading 一部に…を含む ("partially contains...").¹

The collective line is the fastest scan. Memorize the kanji for your own allergens and check that one line first.¹

Major convenience chains label all mandatory plus recommended allergens voluntarily as corporate policy rather than legal duty (as of 2026-05).¹ Factory-sealed コンビニ (konbini, "convenience store") items therefore carry full labeling, while fresh items assembled in store, such as hot-counter oden or steamed buns, do not always carry it.¹

Imported goods in international supermarkets may follow different label formats. Read the Japanese-language portion rather than assuming the home-country format applies.¹

Restaurants Work Differently From Packaged Food

Japan's Food Labeling Act covers packaged processed food. It imposes no equivalent allergen-disclosure duty on restaurant meals, 居酒屋 (izakaya, "Japanese-style pub serving drinks and shared small dishes") dishes, or food-stall items.¹

In practice, most independent restaurants hold no allergen chart. Asking is the only channel, and the answer depends on that specific kitchen, not on any national rule.¹

The borrowed term コンタミネーション (kontamineeshon, "cross-contamination") is not widely understood outside allergy-aware kitchens. Do not assume staff share your vocabulary for it; the card below carries the explanation instead.¹

Chain Restaurants With Published Allergen Charts

Some large chains publish allergen matrices on their websites or on laminated sheets available on request. Examples reported for travelers include CoCo Ichibanya curry shops, MOS Burger outlets, and Ootoya restaurants, each as that chain's own business decision (as of 2026-03; confirm current figures with the individual chain).⁷

Check the chain's current chart before you go. Matrices change with menus, and a chart from last season may not describe today's recipe.⁷

Pre-check chains before you need them

A chain with a published chart is the closest thing to a labeled meal outside a convenience store. Save two or three such options near your route before hunger makes the decision for you.⁷

The Allergy Communication Card: Your Single Most Effective Tool

A written Japanese-language card is the single most effective restaurant tool. It names your allergens by kanji, explains shared-equipment risk where relevant, and stays polite enough that staff read it fully.¹⁴

The Consumer Affairs Agency publishes an official smartphone-use Food Allergy Communication Sheet with checkbox fields in English and other languages. Download the PDF before use so the checkboxes work.⁵

Third-party printable and digital card services also exist, and hotel concierges will often write a personalized card on request (as of 2026-03; confirm current figures with the service provider).⁷ Treat the official sheet as the default and the rest as conveniences, not authorities.

What to Put on the Card

Name each allergen in Japanese script. State severity plainly for a serious allergy so it is not mistaken for a preference. State that you will skip the dish if the ingredient cannot be confirmed.¹⁴²

Two phrases carry most of the weight. 食物アレルギーがあります (shokumotsu arerugii ga arimasu, "I have a food allergy") opens the exchange, and これは___を含みますか (kore wa ___ o fukumi masu ka, "does this contain ___") asks the specific question.⁴²

How to Use the Card at the Table

Show the card before ordering, not after food arrives. Hand it over and let staff carry it to the kitchen.⁴²

Ask whether the dish contains your allergen, never whether the dish is okay for you. The first question asks for a fact the kitchen can check; the second asks staff to make a medical judgment they cannot.⁴²

If staff cannot confirm, step back to a verifiable fallback rather than negotiating at the table. A polite refusal protects both sides: the kitchen makes no claim it cannot verify, and you take no gamble on an unclear meal.²

The flowchart above summarizes the table workflow. Confirmation leads to the meal; anything short of confirmation leads to the fallback.²

Cross-Contamination Norms in Japanese Kitchens

Smaller Japanese kitchens commonly share fryers, broths, utensils, and supplier-prepared sauces. By-default separation of the kind some Western allergy-conscious restaurants practice is less common, so assume shared equipment unless that specific venue says otherwise.⁴²

Tempura counters illustrate the pattern. Shared fryers and wheat batter create high cross-contact risk even for items that are not battered themselves.¹

Assume shared fryers unless this venue says otherwise

Fryer sharing is set kitchen by kitchen, not by law. Ask about the oil at the shop you are standing in; the answer from yesterday's shop does not transfer.¹

Grill surfaces carry similar residue. Meats may arrive lightly pre-seasoned, and tare-sauce traces persist between orders, so even a plain or salt-only request cannot guarantee zero trace contact in a restaurant kitchen.¹

Soba and Buckwheat: The Elevated-Risk Case

Buckwheat has been a mandatory packaged-food allergen since 2002, which makes sealed products reliably labeled.¹ Restaurant soba is the opposite case: boiling water, utensils, and airborne flour are routinely shared with wheat noodles inside soba shops.²

Buckwheat allergy is familiar domestically, so soba shops can typically answer a direct buckwheat question on the spot. Less-familiar allergens tend to get vaguer answers at small venues, which is another reason the written card matters.¹

Hidden-Ingredient Patterns to Learn

Fish-based だし (dashi, "soup stock, usually from bonito or kelp") is the near-universal flavor base for miso soup, noodle broths, and countless sauces. Dishes that look allergen-free routinely contain fish through dashi alone.⁴²

Standard soy sauce is wheat- and soy-based and appears across cooked dishes, tare sauces, pre-seasoning, and grill residue. Ordering 塩 (shio, "salt-only preparation") reduces exposure but does not eliminate trace contact.¹

Sesame hides in ごまだれ (goma-dare, "sesame dipping sauce"), sesame oil, dressings, and ふりかけ (furikake, "dry rice-bowl seasoning"). Each is worth a direct question when sesame is your allergen.⁴

Restaurant kitchens rarely stock gluten-free tamari, so travelers avoiding gluten sometimes carry a small bottle of their own. This is practical preparation, not excess.¹

Planning Ahead: Reservations, Accommodation Meals, and Backup Plans

旅館 (ryokan, "traditional Japanese inn") and kaiseki multi-course meals are prepared hours or days in advance. State allergies at booking, not at the table, since many ryokan booking forms ask about them specifically.¹

Email the card ahead so the chef can plan around it. Advance notice is the difference between an accommodated meal and an apology.¹

Visibility varies by restaurant format. Grill-your-own 焼肉 (yakiniku, "grilled meat eaten cooked at the table") and teppanyaki counters let you watch everything cook, and sushi counters display raw ingredients openly. Tempura shops offer the least visibility into shared equipment.¹

Keep fallback meals mapped along your route. Factory-sealed convenience-store items with readable labels, plain 白ごはん (shiro gohan, "plain steamed rice"), plain fruit, and bottled drinks cover the moments when no kitchen can confirm.¹²

If You Have a Severe Allergy: Physician, Medication, and Emergency Steps

Severity assessment, medication choice, and threshold tolerance belong with your own physician before departure. Discuss what labeling thresholds mean for your case and what your emergency plan requires.¹²

Bringing medication into Japan is controlled by the Pharmaceutical Affairs Law and the Customs Law under the Ministry of Health, Labour and Welfare. Depending on the type and amount, a 輸入確認書 (yunyu kakunin-sho, "import certificate for personal medication, formerly called yakkan shoumei") must be applied for and received before you leave home.⁸⁹

Certificate approval can take several weeks, so apply early and carry a copy of your doctor's prescription plus a letter stating each drug's purpose (as of 2026-05; confirm current figures with the Ministry of Health, Labour and Welfare).¹⁰

In an emergency, call 119 for an ambulance or fire response and 110 for the police.¹¹¹² The phrase アレルギー反応かもしれません。救急車を呼んでください (arerugii hannou kamoshiremasen; kyuukyuusha o yonde kudasai, "I may be having an allergic reaction; please call an ambulance") asks nearby staff to call for you.²

Good to know

Packaged-food labels do not cover restaurant meals

The labeling obligation that makes sealed products trustworthy stops at the restaurant door. Chains may disclose voluntarily and independents mostly do not, so every restaurant meal starts from asking rather than reading.¹

Plan accordingly. A day built only around restaurant meals leaves no verified fallback when a kitchen cannot confirm, while a day with two mapped convenience-store options never strands you.²

Soy and sesame are not on the mandatory list

Travelers from the United States or the European Union often assume soy and sesame are flagged everywhere. In Japan both sit on the voluntary tier, and smaller producers may lawfully omit them.¹

If either is your allergen, read every label rather than scanning for a flag. Major-brand products usually declare them, but "usually" is not a rule.¹

A card is read; a spoken request can be missed

Busy dining rooms swallow spoken English requests. A written card with correct kanji travels to the kitchen and gets read by the person cooking.¹⁴

Save the card as a screenshot and carry a printed copy. Phones run out of battery at exactly the wrong moment.⁴

Small kitchens may decline rather than adapt

A small shop that cannot confirm supplier sauces, shared broths, or fryer contents may refuse the order. That refusal is the safe answer, not rudeness, since the policy is set by that establishment alone.⁴²

Accept it gracefully and move to the fallback. Thanking staff keeps the exchange kind and leaves the door open for better-prepared venues.²

Soba shops answer buckwheat questions directly; less-familiar allergens get vaguer answers

Buckwheat recognition runs deep in Japan, so a direct soba question usually gets a direct answer. Questions about less-familiar allergens at small venues may draw hedged replies that reflect uncertainty rather than assurance.¹

Treat a hedged answer as a no. The fallback meal exists for exactly this moment.²

See also

• Ticket-Machine (Shokken) Restaurants: How to Order Without Speaking Japanese
• Hospitals and Clinics for Tourists: English-Speaking Options and How Billing Works
• Why Travel Insurance Genuinely Matters in Japan
• Finding a Pharmacy in Japan: What's Available Over-the-Counter (and What Isn't)
• Halal Food in Japan: Availability, Certification, and the Practical Reality

References

Footnotes

1. tabemasen.io. "Japan's allergen labeling, explained: what's on the packet vs. what's not on the menu." Updated for 2026 regulations. https://tabemasen.io/allergies/labeling-guide ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³ ↩²⁴ ↩²⁵ ↩²⁶ ↩²⁷ ↩²⁸ ↩²⁹ ↩³⁰ ↩³¹ ↩³² ↩³³ ↩³⁴ ↩³⁵ ↩³⁶ ↩³⁷ ↩³⁸ ↩³⁹ ↩⁴⁰ ↩⁴¹ ↩⁴² ↩⁴³ ↩⁴⁴ ↩⁴⁵

2. Real Japan Guide. "Japan Food Allergy Guide 2026: Labels, Restaurants and Plan B." 2026-07-05. https://real-japan-guide.com/japan-food-allergy-guide-2026/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷

3. ChemLinked (Rose Hong). "Japan Updates Food Labeling Standards Including Mandatory Allergen Labeling and Revised Specific Item Rules." 2026-04-23. https://food.chemlinked.com/news/food-news/new-compliance-alert-mandatory-labeling-changes-for-food-exports-to-japan ↩ ↩² ↩³ ↩⁴

4. japanprep.com. "Food Allergies in Japan (2026): Phrases, Hidden Foods and Allergy Card." Verified 2026-08-09. https://www.japanprep.com/logistics/japan-food-allergies-card/ ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³

5. Consumer Affairs Agency (消費者庁, CAA), Government of Japan. "Food Labelling." Official English page, hosts Food Allergy Communication Sheet downloads. https://www.caa.go.jp/en/policy/food_labeling/ ↩ ↩²

6. LegalClarity Team. "Japan Food Labeling Law: General Requirements." 2026-05-15. https://legalclarity.org/japan-food-labeling-law-general-requirements ↩

7. eatinjapan.jp. "Japan Food Allergies Guide 2026: Eating Safely with Allergies." 2026-03-26. https://eatinjapan.jp/articles/japan-food-allergies-guide ↩ ↩² ↩³ ↩⁴

8. Embassy of Japan in the United States. "Bringing Medications into Japan." Updated 2026-05-18. https://www.us.emb-japan.go.jp/itpr_en/bringing-medications-to-japan.html ↩

9. Ministry of Health, Labour and Welfare (厚生労働省, MHLW). "Information for those who are bringing medicines for personal use into Japan." https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kenkou_iryou/iyakuhin/kojinyunyu/topics/tp010401-1_00001.html ↩

10. U.S. Embassy and Consulates in Japan. "Bringing Over-the-Counter Medicine and Prescriptions into Japan." https://jp.usembassy.gov/services/importing-medication/ ↩

11. Japan National Tourism Organization (JNTO). "Staying Safe in Japan." https://www.japan.travel/en/plan/emergencies/ ↩

12. Fire and Disaster Management Agency (消防庁, FDMA). "Guide for Ambulance Services (English pamphlet)." https://www.fdma.go.jp/publication/portal/items/portal001_fryer_english.pdf ↩