Packaged foods sold at convenience stores and supermarkets in Japan must carry allergen labels. Restaurant meals and over-the-counter prepared foods do not — there is no legal obligation to provide allergy information at all. That asymmetry is the single most important thing to understand before eating out in Japan with a food allergy. Based on primary sources from the Consumer Affairs Agency and other official bodies, this article covers how the labeling system is structured, the risk of cross-contact in kitchens, how to use chain restaurants' voluntary allergen databases and where they fall short, concrete Japanese phrases for communicating your allergy, and emergency contacts. This is a document-based guide, not a report of firsthand testing.

No Mandatory Allergen Labeling When Eating Out — How the System Works

Japan's Food Labeling Act requires allergen labeling only for processed foods sold in containers or packaging. The Consumer Affairs Agency (CAA) states on its official site (accessed August 14, 2026) that the labeling obligation applies to packaged processed foods — which is why the onigiri or sandwich you buy at a convenience store lists its allergens. Restaurants, cafeterias, and prepared foods sold over the counter (bento and deli items) fall outside that obligation.

The CAA's consumer pamphlet on eating out and takeout (July 2026 edition) is explicit: information on food allergies is not legally required at restaurants and takeout counters, and no labeling rules comparable to those for packaged foods exist there. The practical implication is significant. A menu with no allergen information does not mean the allergen is absent. No information is the legal default, and if you need it, you have to actively ask.

That said, allergen disclosure in restaurants is officially encouraged as a voluntary practice. The pamphlet's reference materials include guidance for food-service businesses on providing allergen information, drawn up by a government-convened study group, and some restaurants do publish allergen charts on their own initiative. Whether to do so, however, remains each restaurant's decision. Since packaged-food labels are covered in our convenience store guide, this article focuses on what is specific to eating out.

Which Allergens Must Be Labeled — the 2026 Revision and Its Transition Period

For packaged processed foods, the list of allergens subject to mandatory labeling (tokutei genzairyo, or specified ingredients) currently has nine items, after cashew nuts were added by a revision of the Food Labeling Standards effective April 1, 2026 (Cabinet Office Ordinance No. 34 of 2026). The CAA's food allergy labeling handbook (April 2026 edition) confirms the current list.

The transition period matters. Under the revision's supplementary provisions, processed foods manufactured, processed, or imported by March 31, 2028 may keep labels based on the old eight-item standard. In other words, between 2026 and 2028, store shelves will carry a mix of new labels that include cashew nuts as a mandatory item and old labels that do not. If you have a cashew allergy, the absence of cashew on a label does not rule out its presence in a product made under the old standard.

In addition to the mandatory items, there are 20 recommended-labeling items as of April 2026 (per the same handbook; cashew moved up to the mandatory list, and pistachio was newly added). Recommended labeling is not compulsory, so absence from a label does not mean absence from the food. And to repeat the key point: these lists are packaged-food rules — none of this applies as a legal obligation to restaurant menus.

  • The nine mandatory allergens: shrimp/prawn, cashew nuts, crab, walnuts, wheat, buckwheat (soba), egg, milk, and peanuts

Cross-Contact: "Not Used" Does Not Mean "Not Present"

Even a dish described as free of your allergen can be affected by unintended contamination during preparation. The CAA pamphlet warns that restaurants and takeout kitchens usually prepare multiple dishes at once, that allergens can unintentionally end up in dishes meant to be allergy-safe, and that completely preventing unintended contamination (cross-contact) is difficult. The pamphlet gives four typical routes:

At restaurants serving soba, a specific issue is boiling soba and udon noodles in the same pot of water. Our soba and udon guide covers that cross-contact problem in detail in its allergy section, so readers with a buckwheat allergy should read it alongside this article.

  • Shared cutting boards and knives used across multiple dishes
  • Shared nozzles on drink dispensers
  • Shared spoons and tongs at deli or self-serve counters
  • Airborne soba flour or wheat flour settling on other food in the kitchen

Chain Restaurants' Voluntary Allergen Databases — How to Use Them and Their Limits

Many major chains publish allergen information voluntarily, despite having no legal duty to do so. McDonald's Japan offers an official menu-by-menu allergen search, and notes that items subject to cross-contact — shared frying oil, production lines, or in-store preparation — appear even in results filtered for "not used." The Skylark group (Gusto and other brands) runs a search site by brand covering the nine mandatory allergens plus 19 recommended items, with explicit warnings about shared cooking utensils, tableware, frying oil, and drink-bar nozzles. Mos Burger publishes its allergen data as PDF charts and notes that contamination at factories or in store kitchens remains possible (all per each company's official site as of August 14, 2026).

A practical caution: each site is current as of a different date. As of August 14, 2026, Skylark had updated to the nine-item standard, while the McDonald's search page still carried a note referring to the eight mandatory and 20 recommended items "as of September 2024." Before relying on any chain's database, check which date and which allergen standard the page is based on. A newly mandatory item like cashew may not be individually searchable in a database built on the old standard.

Finally, these databases are voluntary disclosures, and practice can vary from store to store. They describe ingredients, not what happens at the counter of the specific branch you walk into — cross-contact on site is outside their guarantee. Treat them as a pre-visit research tool, not a safety certification.

How to Communicate Your Allergy — Japanese Phrases and the Official Communication Sheet

The CAA pamphlet advises directing allergy questions to a manager or a staff member who actually knows the ingredients, and cautions that a staff member's quick "it's not in there" can be unreliable. The basic approach is not to settle for an instant answer at the register, but to ask that someone who knows the recipes confirm. Useful Japanese phrases include:

If you are not confident in Japanese, the CAA publishes a Food Allergy Communication Sheet — a bilingual Japanese-English sheet with pictogram checkboxes that you mark and show to staff. Note one gap: the current English version is the April 2024 edition, so its allergen list still follows the old eight-item standard. For cashew nuts or anything else not on the sheet, add a spoken or written note.

On the question of who decides, the pamphlet is clear: the final judgment on whether you can eat something rests with you or your family, not with the restaurant. Information from the staff is input for that decision — the decision itself stays with you.

  • "◯◯ no arerugī ga arimasu" （◯◯のアレルギーがあります） — I have a ◯◯ allergy
  • "Kono ryōri ni ◯◯ wa haitte imasu ka" （この料理に◯◯は入っていますか） — Does this dish contain ◯◯?
  • "Genzairyō o kakunin shite itadakemasu ka" （原材料を確認していただけますか） — Could you check the ingredients?
  • "◯◯ o nuku koto wa dekimasu ka" （◯◯を抜くことはできますか） — Can you leave out ◯◯?

Small Independent Restaurants — Why "We Can't Guarantee It" Is an Honest Answer

Unlike chains, small independent restaurants typically cook with a mix of commercial sauces, seasonings, and semi-prepared ingredients, and the owner may not be able to trace every allergen in them. If you ask and the answer is "we can't accommodate that" or "we can't guarantee it," treat it as more honest than an unfounded "it's fine" — and as a signal to choose another restaurant rather than to press for accommodation.

Risk tolerance differs from person to person. The CAA pamphlet notes that even trace contamination can cause severe symptoms, and that eating out should follow the guidance of your doctor. This article does not attempt to judge what level of risk is acceptable for you. If you have a history of reactions, decide the scope of your eating out in consultation with your physician.

Emergencies: 119 and the Japan Visitor Hotline

If symptoms develop, call 119 for an ambulance. The Fire and Disaster Management Agency publishes a Guide for Ambulance Services for foreign visitors as PDFs in 16 languages, including English, Chinese, Korean, and Spanish, covering how to call and what to say.

Japan also has #7119, a phone line for advice on whether to call an ambulance, staffed by doctors, nurses, and paramedics — but as of August 14, 2026 it operates in only 41 regions nationwide, and its official page makes no mention of multilingual support, so it is best regarded as a Japanese-language service. For foreign visitors, the primary contact is JNTO's Japan Visitor Hotline at 050-3816-2787 (from overseas: +81-50-3816-2787), available 24 hours a day, 365 days a year in English, Chinese, and Korean, covering emergencies such as illness and accidents.

If you have a history of anaphylaxis, confirm your doctor's instructions before traveling or eating out, including carrying any prescribed medication. If symptoms progress rapidly, do not hesitate — call 119. This article explains the system based on published sources; for any medical decision, consult a physician.

Sources & References