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Intellectual Property

Japanese Investors Registering Trademarks in Vietnam: Conflict Search Before Filing

4 min readFLAT LAW FIRM
Modern office workspace — illustrating Japanese investors registering trademarks in Vietnam

Japanese companies are famous for thorough preparation — yet many file in Vietnam without a proper conflict search, trusting that a mark registered with the JPO will sail through. Vietnam’s register is dense, examination is strict on similarity, and a refusal costs a year. For Japanese investors, the filing is the last step; the search is the first.

Legal basis

Law on Intellectual Property 50/2005/QH11, amended by Law 07/2022/QH15 (effective 01/01/2023) and Laws 93/2025/QH15 and 131/2025/QH15 (effective 01/04/2026); consolidated document 67/VBHN-VPQH 2026. Decree 65/2023/ND-CP details industrial property. Article 119 sets the examination track (1-month formality, 1-month publication, 5-month substantive examination; a 3-month fast-track examination is available under Clause 2a of Article 119). Article 112a (added by the 07/2022 amendments) gives third parties 5 months from publication to file oppositions; the period cannot be extended. All instruments remain in force as of the writing date.

Where to search — and what a search actually tells you

Three sources, used together:

  • The IP Office of Vietnam’s database — the authoritative record of national filings and registrations;
  • WIPO Global Brand Database — for international registrations designating Vietnam under the Madrid system, which also block national filings;
  • Market reality — unregistered but well-known marks can still matter in disputes, though they do not block examination the way registered marks do.

A search does not give a yes-or-no answer. It gives a risk map: identical prior marks (near-certain refusal), similar marks in the same class (arguable — depends on distinctiveness and goods proximity), similar marks in distant classes (usually safe). Japanese headquarters accustomed to JPO examination should note that Vietnam’s examiners apply similarity strictly, including across Vietnamese transliterations of foreign words.

The transliteration trap for Japanese brands

A distinctive feature of Vietnamese practice: a foreign word mark and its Vietnamese transliteration or translation can be held confusingly similar. A katakana or romaji brand rendered into Vietnamese phonetics by local distributors — on packaging, invoices, advertising — creates a paper trail of an “equivalent” mark. If a third party registers that Vietnamese version first, the Japanese owner faces a genuine conflict. The defensive answer is to register the Vietnamese transliteration and translation alongside the original from the start, before distributors or competitors do.

When refusal or opposition comes

If the examiner issues a provisional refusal, the applicant has a set period to respond with arguments and evidence — this is where the pre-filing search pays for itself, because the arguments are prepared in advance. If a third party files an opposition within the 5-month window under Article 112a, the Office examines the opposition alongside the application; there is no extension of the opposition period, so monitoring the publication gazette matters. In both cases, having a local IP agent who knows the examiners’ practice is decisive — Japanese companies should not navigate this correspondence from Tokyo alone.

Action checklist

  • Search the national database and WIPO Global Brand Database before filing — including Vietnamese transliterations of the brand.
  • File the original mark plus its Vietnamese transliteration/translation defensively.
  • Prepare refusal-response arguments at the search stage, not after the refusal arrives.
  • Monitor the publication gazette during the 5-month opposition window (Article 112a).
  • Appoint a licensed Vietnamese IP agent; keep all correspondence local and timely.

Frequently asked questions

1. Is our JPO registration enough for Vietnam?
No. Trademark rights are territorial. File nationally in Vietnam or designate Vietnam through the Madrid Protocol.

2. How long do third parties have to oppose?
Five months from the publication date under Article 112a; the period cannot be extended.

3. Should we register the Vietnamese version of our brand name?
Yes, defensively. If distributors or competitors register the transliteration first, you face a real conflict over the name the market actually uses.

4. What if the examiner refuses for similarity?
Respond within the set time limit with arguments distinguishing the marks and goods, plus evidence of distinctiveness. A pre-filing search makes this response far stronger.

5. Can we file in English?
No — national applications must be in Vietnamese and filed through a licensed local IP representative.

IP advice for FDI enterprises

For Japanese investors, Vietnam rewards the same thoroughness Japan is known for — applied before filing, not after refusal. FLAT LAW FIRM provides conflict searches, filing strategy and opposition handling for Japanese companies. Contact us for advice tailored to your case.

This article provides general legal information and does not substitute advice for specific cases.

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