Overview
The Japan Patent Office (JPO, 特許庁) examines patents, utility models, designs, and trademarks in Japan. The tool a cross-border seller actually opens for Amazon.co.jp is J-PlatPat, the Japan Platform for Patent Information run by INPIT: a free official search of Japanese trademarks by pronunciation, similar-group code, goods, and legal status, then a JPO filing whose number enrolls Brand Registry. The office site is jpo.go.jp; the search app is j-platpat.inpit.go.jp. English pointers live on the JPO Trademark Search page.
This is not an agency and not Amazon Japan support. J-PlatPat search is free; application and registration fees are official JPO yen fees per class. Applicants without a Japanese domicile generally must appoint a Japanese benrishi (patent attorney). The distinctive Japanese risk is 称呼 (pronunciation): two marks with different Latin spellings can still collide if the katakana reading is close. If you do not sell on Amazon.co.jp, do not pay JPO trademark fees for a store you do not run.
J-PlatPat also searches Japanese patents, utility models, and designs. This entry is written for the seller’s usual job — Japanese trademarks. Switch databases on the same platform for Japanese patents.
Core features and advantages
J-PlatPat trademark search
J-PlatPat offers number search, keyword/class search, well-known Japanese marks, unregistrable signs, the CFE device table, and a goods/services name search. A seller’s minimum pass: 称呼（類似検索） with full-width katakana readings, plus 「商標（検索用）」 for the Latin/kanji string, plus the similar-group code for the goods (the JPO’s own startup guide uses examples such as 26A01 for printed matter — always confirm in the goods search). The JPO warns that a single query can miss hits; change fields and re-run, and read the J-PlatPat manual chapter on trademarks. An English UI exists; pronunciation search still wants katakana. Results are not a legal opinion.
Pronunciation, similar groups, and goods
Japanese examination looks at appearance, pronunciation, and concept, then whether the designated goods/services fall in similar groups. An English brand needs every plausible Japanese reading (KAKAKU, カカク, カカクドットコム) searched separately. Similar groups are finer than Nice classes; ticking an international class is not enough. The goods/services search finds standard names by keyword, class, and similar-group code. The well-known mark database is how you avoid certified famous Japanese brands. Device marks need CFE codes, not word search alone.
E-filing, official fees, and representation
Filings go to the JPO (electronic filing is the normal path). On the JPO schedule of fees (Japanese and English tables checked 2026-09-06): trademark application ¥3,400 + ¥8,600 per class (¥12,000 for one class); registration ¥32,900 per class for ten years, or ¥17,200 per installment; renewal ¥43,600 per class. Paper filings add a digitization fee. Madrid designations of Japan moved to a single individual-fee payment for international registration dates on or after 1 April 2023. J-PlatPat helpdesk: helpdesk@j-platpat.inpit.go.jp. The JPO trademark-search policy page lists PA0630@jpo.go.jp. Official X: @JPO_JPN (English) and @jpo_NIPPON (Japanese).
Supported platforms
A JPO trademark is a Japan right: Amazon.co.jp Brand Registry, Rakuten/Yahoo! Shopping brand protection, and a Japan Shopify store. It does not cover the United States or the EU. Amazon.com and Amazon EU still want USPTO or EUIPO. J-PlatPat’s patent collection is Japanese; it does not replace Espacenet for worldwide families or USPTO for U.S. drawings. Nothing writes into Seller Central. INPIT posts planned J-PlatPat outages (for example a patent-search window announced for October 2026) — check the live banner.
Who it's for
- Solo / small teams building a Japan private label: J-PlatPat pronunciation search, then a benrishi filing, then Amazon.co.jp Brand Registry.
- Mid-size brands with multi-class Japan portfolios, watching new Japanese filings, calendaring ten-year renewals.
- Sellers with no Japan domicile, who must appoint a benrishi rather than drafting Japanese goods language themselves.
- Skip it if you do not sell in Japan, or if you only needed Japanese patents/designs (same platform, different database).
Concrete use case: freeze the Latin brand, list every reasonable katakana reading, search J-PlatPat with 称呼（類似検索） plus the similar-group code, then search the Latin string. If nothing obvious blocks you, have a benrishi file standard goods names. Official fees for one class are about ¥12,000 to file and ¥32,900 to register — cheaper than a dead Japan inbound. After the application number is searchable, enroll Amazon.co.jp Brand Registry.
Pricing and value
J-PlatPat search is free. JPO official fees (formula ¥3,400 + ¥8,600 × classes):
- One class, application: ¥12,000
- Two classes, application: ¥20,600
- Registration (10 years): ¥32,900 per class
- Renewal: ¥43,600 per class
Benrishi fees are extra. For Amazon.co.jp Brand Registry, about ¥44,900 in official fees for one class is usually cheaper than one hijacked Japan listing. Extra classes and a missed pronunciation are how attorney and refusal costs stack. Confirm on the Japanese fee table and the English schedule of fees.
Community feedback
Sellers and benrishi blogs treat J-PlatPat as mandatory and repeat the same warning: an English-only search is not a search. Amazon.co.jp Brand Registry can start from a pending or registered Japanese mark (confirm Amazon’s live rules); you do not always wait for the certificate, but a later JPO refusal can still hurt the brand tools. The English UI exists; deep work and the manual are still better in Japanese. The helpdesk answers how to search, not whether you can register. The JPO will not decide your case on X. Official fees are rarely the complaint; Japanese goods language, similar groups, and the benrishi requirement are.
Competitive positioning
JPO / J-PlatPat is the official Japan register; pronunciation and similar groups are the moat. USPTO is the U.S. federal path. One EUIPO EUTM covers 27 states, not the UK and not Japan. Espacenet is patents, not Japanese trademark examination. Commercial screens such as iP51 are a first pass and cannot file at the JPO. WIPO’s Global Brand Database helps with devices; it is not the authority for Japanese goods language.
Alternatives
- United States Patent and Trademark Office — USPTO for Amazon.com Brand Registry.
- European Union Intellectual Property Office — EUTM for Amazon EU.
- iP51 trademark search — a commercial multi-country screen; official Japan search remains J-PlatPat.
Limitations
No Japan domicile means a benrishi. Missed pronunciation is the main practical failure. The English UI is thinner. A search is not legal advice. Examination takes months; official fees are not a “success-or-refund” product. J-PlatPat has planned outages. A Japanese trademark does not cover the U.S. or EU. Amazon will not pay your renewal for you.
Verdict
If you run a private-label brand on Amazon.co.jp, make J-PlatPat pronunciation and similar-group search a fixed step, file through a benrishi, and enroll Brand Registry with the number. U.S. and EU stores use those offices.
Next step: open J-PlatPat, search katakana readings and similar-group codes, then — if you will file — use the current JPO fee table and a Japan-domiciled benrishi. Search-tool questions: helpdesk@j-platpat.inpit.go.jp.
Data notes
Rechecked 2026-09-06 against jpo.go.jp, J-PlatPat, the English Trademark Search page, and the industrial-property fee tables (¥3,400 + ¥8,600 per class to file; ¥32,900 per class to register). published (2024-03-15), monthlyVisits, domainRating, and authorityScore are catalog placeholders and unverified. The JPO’s institutional history dates to 1885; the catalog date is not the founding day. Benrishi fees, pendency, and registrability are case-specific. Brand Registry rules should be confirmed in Amazon Japan’s portal.