Japan Food Allergen Labeling: Mandatory and Recommended Declarations for Importers

Japan's Food Labeling Act (Shokuhin Hyoji Ho), enforced by the Consumer Affairs Agency (CAA), mandates allergen declaration for all pre-packaged food products sold in Japan, including imported goods. Unlike the US system where the FDA requires declaration of 9 major allergens under FALCPA, Japan operates a two-tier system: 8 specific raw materials requiring mandatory declaration (tokutei genzairyo) and 20 items requiring recommended voluntary declaration (tokutei genzairyo ni junzuru mono). Taiwan food exporters must comply with both tiers on Japanese market labels to avoid import rejection at quarantine inspection and to meet retailer expectations.

The 8 mandatory allergens in Japan are wheat, buckwheat, egg, milk, peanut, shrimp, crab, and walnut. Walnut was added to the mandatory list in March 2025 after a Cabinet Office Consumer Commission review found increasing allergy incidence. Every pre-packaged food product containing these 8 allergens as ingredients or processing aids must declare them in the allergen section of the Japanese label, regardless of quantity. This includes trace amounts from shared manufacturing equipment, which is a stricter approach than the US threshold-based system. The penalty for non-compliance is a product recall order from the CAA and potential criminal prosecution under Article 6 of the Food Labeling Act.

The 20 recommended allergens include abalone, squid, salmon roe, orange, cashew, kiwifruit, beef, sesame, salmon, mackerel, soybean, chicken, banana, pork, matsutake mushroom, peach, yam, apple, gelatin, and almond. While declaration of these 20 items is technically voluntary, in practice virtually all Japanese food manufacturers and importers declare them because failure to do so creates consumer trust issues and retailer pushback. Major Japanese retailers including Aeon, Seven & i Holdings, and Lawson require declaration of all 28 allergens (8 mandatory plus 20 recommended) as a condition of product listing. Taiwan brands targeting Japanese retail should treat all 28 as mandatory.

The allergen declaration format in Japan differs from Western labeling conventions. Japan allows two display methods: the individual declaration method (kobetsu hyoji), where each allergen is listed in parentheses after the relevant ingredient in the ingredient list, and the collective declaration method (ikkatsu hyoji), where all allergens are listed together at the end of the ingredient list following the phrase "ichibu ni...wo fukumu" (contains some of...). The collective method is simpler but the individual method provides more transparency. Since April 2025, the CAA has recommended the individual method for new products, and many retailers require it. Choose the individual method for your Japanese labels to future-proof compliance.

Japanese food labels must follow the format prescribed in the Food Labeling Standards (Shokuhin Hyoji Kijun), including specific font size requirements. All mandatory label information, including allergen declarations, must be printed in a minimum font size of 8 points for packages with a display area of 150 square centimeters or larger, and a minimum of 5.5 points for smaller packages. The label must be in Japanese using standard kanji, hiragana, or katakana characters. Taiwan brands cannot rely on bilingual labels that include only Chinese characters, even when the characters are visually similar to Japanese kanji, because the CAA requires compliance with Japanese orthographic standards.

Cross-contamination advisory statements (kontamineshon hyoji) are not governed by the Food Labeling Act but are addressed in the CAA's labeling guidance documents. Japanese industry practice is to include a precautionary statement when a product is manufactured on shared equipment with any of the 28 allergen items. The standard phrasing is "honhin seihin setsubi de wa [allergen] wo fukumu seihin wo seizo shiteimasu" (this product is manufactured on equipment that also processes [allergen]). Unlike US "may contain" statements, which have no regulatory standing, Japanese cross-contamination statements are considered by the CAA during label review and are expected by Japanese consumers, particularly parents of children with allergies.

The nutrition facts panel on Japanese food labels must also declare specific nutrients in a prescribed order: energy (kcal), protein (g), fat (g), carbohydrate (g), and sodium (expressed as salt equivalent in grams). This differs from the US Nutrition Facts format and the Australian NIP format. Additionally, if you make any voluntary nutrition claims (such as "high in calcium" or "low fat"), the claim must meet the thresholds specified in the Nutrition Labeling Standards. Taiwan brands should prepare separate label artwork for the Japanese market rather than attempting to adapt existing US or Australian labels, because the format requirements are fundamentally different.

Label approval in Japan is not a formal government process like TGA labeling review in Australia. Instead, the importer of record is responsible for ensuring label compliance, and labels are inspected during quarantine at the port of entry by the Ministry of Health, Labour and Welfare (MHLW) quarantine stations. Products with non-compliant labels are rejected at the border and must be re-labeled or destroyed at the importer's expense. To avoid border rejection, Taiwan brands should engage a Japanese regulatory affairs consultant (typically JPY 150,000 to JPY 300,000 per SKU) to review and approve label artwork before printing. The consultant will verify allergen declarations, nutrient calculations, ingredient name translations, and format compliance against current CAA guidance.

All food imports into Japan must pass through the MHLW quarantine inspection system, which operates at 31 quarantine stations across major ports and airports. When your shipment arrives, the importer files an Import Notification (yunyu todoke) with the quarantine station, declaring the product type, ingredients, country of origin, and manufacturing facility. The quarantine station determines whether the shipment requires document review only, laboratory testing, or both. Approximately 8 to 12 percent of food import shipments are selected for laboratory testing based on risk assessment, product history, and random sampling. First-time importers and new product categories face a higher probability of testing selection.

Laboratory testing for allergens at MHLW quarantine stations uses ELISA (enzyme-linked immunosorbent assay) methodology to detect specific allergenic proteins. The detection threshold for mandatory allergens is 10 micrograms per gram of food, which is approximately 10 parts per million (ppm). If an allergen is detected above this threshold in a product that does not declare it on the label, the entire shipment is rejected and the product is placed on the MHLW's monitoring list, triggering mandatory testing for future shipments. Taiwan manufacturers using shared production lines must implement validated allergen cleaning procedures and verify effectiveness through in-house testing before each production run.

The MHLW publishes a list of food safety violations on its website, including allergen labeling failures, updated monthly. Appearing on this list has cascading commercial consequences: Japanese retailers monitor the violation list and will delist products from non-compliant suppliers, competing brands may use the violation in sales presentations, and the importer's credibility with quarantine stations is permanently damaged. In fiscal year 2024, the MHLW recorded 47 allergen-related violations among imported food products, with the most common failures being undeclared milk protein in processed foods, undeclared wheat in sauces, and undeclared shrimp in seasoning blends.

Taiwan brands exporting processed foods that contain complex ingredient blends (sauces, seasonings, compound flavors) face the highest allergen compliance risk because sub-ingredient allergens may not be visible in the primary ingredient list. Japan requires declaration of allergens present in sub-ingredients down to the lowest level of the ingredient hierarchy. For example, if your product contains a seasoning blend that uses soy sauce (which contains wheat and soybean), both wheat and soybean must be declared even though they appear only as sub-ingredients of a sub-ingredient. Request full allergen declarations from every ingredient supplier in your supply chain and verify their accuracy through independent testing. Budget JPY 50,000 to JPY 100,000 per product for comprehensive allergen testing at a Japanese accredited laboratory.

Start by conducting a complete allergen audit of every product intended for the Japanese market. Map every ingredient, sub-ingredient, and processing aid against the list of 28 Japanese allergens (8 mandatory plus 20 recommended). Request allergen declarations from each ingredient supplier using a standardized questionnaire that specifically asks about the 28 Japanese allergens, not just the US Big 9 or EU 14 allergens. Japan's list includes items not covered by US or EU regulations, such as buckwheat, matsutake mushroom, yam, and salmon roe, which means your existing allergen documentation may be incomplete for Japan compliance.

Engage a Japanese food labeling specialist (shokuhin hyoji senmon ka) early in the product development process. These specialists typically charge JPY 150,000 to JPY 300,000 per SKU for complete label development including allergen declaration review, nutrition calculation, ingredient name translation using approved Japanese terminology, and format compliance verification. Firms such as Japan Food Research Laboratories (JFRL), Nippon Shokuhin Bunseki Center, and independent consultants affiliated with the Japan Food Labeling Association provide these services. Provide them with complete product specifications, certificates of analysis, and supplier allergen declarations so they can develop accurate Japanese labels.

Implement allergen control procedures at your Taiwan manufacturing facility that meet Japanese expectations. This includes documented allergen segregation during storage and production, validated cleaning procedures between production runs using different allergen profiles, and regular allergen verification testing. The Japan Food Sanitation Association recommends lateral flow immunoassay rapid testing for production-line allergen verification, with ELISA confirmation testing for each product formulation at least quarterly. Document all allergen control procedures in a HACCP-based food safety plan that your Japanese importer can present during quarantine inspections or retailer audits.

Plan for a Japanese label printing lead time of 4 to 6 weeks from final artwork approval to delivery. Japanese label printing requires specialized Japanese font support and often uses different label materials than Taiwan domestic products. Many Taiwan brands find it cost-effective to print Japanese labels in Taiwan using a printer experienced in Japanese market requirements, but the alternative is to ship products to Japan with blank back panels and apply Japanese labels at a Japanese warehouse. This re-labeling approach adds JPY 30 to JPY 80 per unit but provides flexibility to adjust labels without reprinting the primary packaging. Whichever approach you choose, always produce printed proofs reviewed by your Japanese labeling specialist before committing to production quantities.