Japan Act Against Unjustifiable Premiums and Misleading Representations Guide

The Act Against Unjustifiable Premiums and Misleading Representations (Keihinhyoujiho, formally Act No. 134 of 1962, comprehensively amended in 2014) is Japan's primary consumer protection law governing advertising claims and promotional premiums. Administered by the Consumer Affairs Agency (CAA) and enforced by prefectural governments, this law applies to all goods and services sold in Japan regardless of the seller's nationality. Taiwan brands selling through Amazon Japan, Rakuten, or Japanese distributors are fully subject to the Act's requirements.

The Act addresses two main areas: misleading representations (futou hyouji) and unjustifiable premiums (futou keihin). Misleading representations include any advertising claim that makes a product appear significantly superior to competitors when it is not (superiority misrepresentation) or significantly cheaper or more advantageous than it actually is (advantageous misrepresentation). Unjustifiable premiums are promotional gifts, prizes, or incentives that exceed legally prescribed limits and distort consumer purchasing decisions.

The CAA has significantly increased enforcement activity since 2019. In fiscal year 2023, the CAA issued 50 cease-and-desist orders (sochi meirei) under the Act -- a record high. Penalties for violations include surcharge orders (kachoukin) calculated at 3% of the affected sales revenue for up to 3 years. A Taiwan brand with JPY 100 million in Japan sales over 3 years during a violation period faces a potential surcharge of JPY 3 million. Repeat offenders face surcharges increased by 50% to 4.5% of affected revenue.

For Taiwan brands, the most common violations involve product listing claims on e-commerce platforms. Exaggerating ingredient efficacy, using unsubstantiated comparison claims, misrepresenting country of origin or manufacturing methods, and offering excessive promotional premiums all trigger enforcement risk. The CAA monitors major e-commerce platforms systematically and accepts consumer complaints through the National Consumer Affairs Center hotline.

Superiority misrepresentation (yuryou goso) occurs when advertising makes a product appear substantially better than it actually is or substantially better than competing products without legitimate basis. This prohibition covers claims about product quality, specifications, performance, ingredients, manufacturing methods, and origin. A Taiwan food brand claiming "premium organic ingredients" when only 30% of ingredients are organic commits superiority misrepresentation. A skincare brand claiming "clinically proven to reduce wrinkles by 80%" without published clinical data violates the same provision.

Advantageous misrepresentation (yuuri goso) occurs when advertising makes the transaction terms appear significantly more favorable than they actually are. This covers pricing claims, discount representations, and terms of sale. Common violations include displaying a high "original price" that was never actually charged to create the appearance of a significant discount, advertising "limited time" offers that run continuously, and representing free shipping when shipping costs are actually embedded in the product price at a premium over market rates.

The 2023 amendment introduced a particularly important provision: the burden of proof for superiority claims now rests on the business. When the CAA issues a demand for substantiation (gojou shounin), the business must provide reasonable evidence supporting the claimed superiority within 15 days. Failure to produce evidence within this period creates a legal presumption that the representation is misleading. This reversal of burden of proof means Taiwan brands must maintain substantiation files for every advertising claim used in the Japan market.

Country of origin misrepresentation is aggressively enforced. Products manufactured in one country but implied to be from another through packaging design, brand naming, or advertising imagery violate the Act. A Taiwan brand using Japanese-sounding brand names, Mount Fuji imagery, or Japanese characters in packaging to imply Japanese origin when the product is manufactured in Taiwan commits origin misrepresentation. The product must clearly state the actual country of manufacture.

Specific industries face additional representation restrictions through CAA fair trade codes. The cosmetics industry is governed by the Cosmetics Fair Trade Code, which restricts efficacy claims to 56 approved claim categories. The food industry is governed by the Health Promotion Act, which restricts health claims on food products. Taiwan brands should identify all industry-specific fair trade codes applicable to their product categories and ensure advertising claims comply with both the general Keihinhyoujiho and the specific industry codes.

The Act prescribes maximum limits for promotional premiums (keihin) based on the type of promotion and the transaction value. For general premiums (sougo keihin) -- premiums offered to all purchasers -- the maximum premium value is 20% of the transaction price, with an absolute ceiling of JPY 100,000. For example, a product priced at JPY 5,000 can include a premium worth up to JPY 1,000. A product priced at JPY 1,000,000 can include a premium worth up to JPY 100,000 (the absolute ceiling, not 20%).

Lottery premiums (kentou keihin) -- premiums offered through random drawings, contests, or sweepstakes -- have different limits. The maximum prize value for a single winner is capped at 20 times the transaction price (up to JPY 100,000 ceiling). The total prize value for all winners combined must not exceed 2% of total expected sales during the promotion period. A Taiwan brand running a sweepstakes on Amazon Japan for a JPY 3,000 product can offer a maximum single prize of JPY 60,000, and total prizes cannot exceed 2% of expected campaign sales.

Open premiums (kaihou keihin) -- promotional incentives not tied to a purchase -- are capped at JPY 100,000 per recipient. This applies to giveaways, social media contests not requiring a purchase, and promotional samples above minimal value. Point programs, cashback offers, and loyalty rewards are generally classified as general premiums and subject to the 20% transaction price limit.

Taiwan brands must be particularly careful with bundle promotions on Amazon Japan. Offering a "buy one, get one free" promotion is permissible because the free item is part of the transaction, not a premium. However, offering a promotional gift valued above 20% of the transaction price with purchase violates the premium limits. Amazon Japan's promotional tools (coupons, lightning deals, bundle discounts) are generally compliant, but custom premium promotions managed outside Amazon's system must be independently verified against premium limits.

Violations of premium limits result in cease-and-desist orders and surcharge penalties. The CAA has issued enforcement orders against both domestic and foreign companies for excessive premium campaigns. In 2022, the CAA ordered a major e-commerce company to cease a promotion offering prizes exceeding lottery premium limits. Taiwan brands running promotional campaigns in Japan should document the premium value calculation and verify compliance with the applicable limit category before launch.

Enforcement of the Keihinhyoujiho involves three levels: prefectural government guidance (shidou), CAA administrative orders (sochi meirei), and CAA surcharge orders (kachoukin meirei). Prefectural guidance is informal and advisory -- a prefectural consumer affairs office may contact a brand to request voluntary correction of a potentially misleading claim. If the brand complies promptly, no formal action follows. CAA administrative orders are formal cease-and-desist orders that are publicly disclosed and require the business to correct the violation, publish a public notice, and implement preventive measures.

Surcharge orders impose financial penalties calculated at 3% of affected sales revenue during the violation period (up to 3 years). The CAA may reduce the surcharge by 50% if the business self-reports the violation before investigation begins and fully cooperates. Conversely, surcharges increase by 50% (to 4.5%) for repeat offenders who have received a cease-and-desist order within the preceding 10 years. Criminal penalties are available for egregious violations but are rarely pursued.

For Taiwan brands, practical compliance requires three measures. First, maintain a claims substantiation file for every advertising statement used in Japan -- including product listings, social media posts, packaging claims, and point-of-sale materials. Evidence should be specific, relevant, and current (studies older than 5 years may be challenged). Second, implement a pre-publication review process for all Japanese market advertising. Have a Japanese regulatory consultant or the MAH partner review all claims before publication.

Third, establish a rapid response protocol for CAA inquiries. The CAA's substantiation demand process gives businesses only 15 days to produce evidence. Taiwan brands should maintain organized, readily accessible evidence files -- not scattered across different departments or stored only in Taiwan headquarters. Store substantiation files digitally with the Japanese MAH partner and designate a compliance officer authorized to respond to CAA inquiries within 48 hours.

Consumer complaints are a primary trigger for CAA investigations. The National Consumer Affairs Center (Kokumin Seikatsu Center) processes approximately 900,000 consumer inquiries annually, and complaint trends drive enforcement priorities. Taiwan brands should monitor consumer reviews on Amazon Japan and Rakuten for complaint patterns that might trigger regulatory attention. Proactively addressing product quality issues, correcting misleading listing claims, and responding to consumer complaints reduces the likelihood of CAA investigation referrals.