Trademark Search in Japan: How to Check Prior Marks Before Filing (and What People Miss)

"Our mark is registered at home — will it be fine in Japan?" "We searched the English spelling and found nothing. Is that enough?"

A mark that is clear in your home country can still be blocked in Japan by an earlier Japanese mark you never saw. In this article, Japanese Patent Attorney Toru Kano of BrandAgent explains what a prior trademark search in Japan covers, the points most often missed, and how to use the results to decide what to file.

What you will learn

What a prior trademark search is and why it matters in Japan
The five layers of a proper search
Common oversights that lead to refusals
How to turn search results into a filing strategy

What is a prior trademark search?

A prior trademark search checks, before you file, whether an identical or similar mark has already been filed or registered in Japan for the same or similar goods or services.

Japan is a first-to-file country. Rights go to whoever files first, not to whoever used the mark first abroad. Registration in China, Korea, the EU or the US has no effect in Japan, so a Japanese search is needed even for well-established brands.

Why search first: the risks of skipping it

Office Action: the JPO objects to your mark citing an earlier one. You must respond through a Japanese patent attorney, and the process gets longer.
Final refusal: if the objection cannot be overcome, the application is refused and the filing costs are lost. You may have to change the brand and file again.
Delayed market entry: marketplace brand registration, packaging, ads and listings for Japan can all stall while the mark is uncertain.

The five layers of a proper search

Checking only for the exact spelling is the most common reason searches fail. A proper search works through these layers in order.

1. Exact match

Start with identical marks — in the Latin alphabet and in katakana (the Japanese script used for foreign words).

2. Spelling and script variants

This is where most misses happen. Check:

Latin letters, katakana and hiragana versions of the name
Upper/lower case
With or without spaces, hyphens, dots or other symbols
Word order and joining in multi-word names ("A B", "AB", "A-B")

3. Pronunciation (the most important layer)

Japanese examiners compare how marks sound when read in Japanese. A Latin-letter mark is converted into its natural katakana reading, and two marks with different spellings can be found similar if their readings are close. Short names, marks that differ only in the ending, and differences in long vowels or small "tsu" sounds are high-risk. Foreign applicants often miss this because two names that look and sound distinct in English or Chinese can collapse into nearly the same katakana reading.

4. Closeness of goods and services

Different class numbers do not guarantee safety: goods in different classes can still be treated as similar. Conversely, marks in the same class may be low-risk if the specific goods are far apart. Japan uses "similarity group codes" to judge this, and reading this distance correctly is the hardest part of a search.

5. Logos: dominant part and overall impression

For a logo, the examiner may focus on its most prominent part rather than the whole design. A text element inside a logo is also searched and compared on its reading.

Common oversights

Oversight	Why it causes trouble	What to check
"Spelled differently, so it's safe"	Similarity is judged by sound too	The katakana reading of every variant
"Different class, so it's safe"	Goods in different classes can be similar	The specific goods/services, not just the class number
Missing a partial match in a composite mark	One element of a longer mark can be the conflict	Each element of combined marks
Logo looks different overall	The dominant part can decide the outcome	The core visual and text elements
Checking registrations only	An earlier pending application can block you too	Pending applications, not just registered marks

Tip for e-commerce sellers

Short invented names of five to seven letters are popular for online brands, but they are also the names most likely to collide with an existing Japanese mark on pronunciation. Search before you print packaging or set up a store for Japan.

How to use the results

A search is not a simple pass/fail. It is the basis for deciding how to file. If a similar earlier mark turns up, the options include:

Narrowing or reorganizing the goods/services to avoid the overlap
Adjusting the mark itself to create distance
Changing the combination of word and logo (e.g. filing the logo rather than the word alone)

We then weigh three things together: the likelihood of registration, the scope of protection you would actually get, and the cost.

Cases where a professional search is especially important

The name is short or close to an ordinary word, so there are many hits
The name can be read or written in several ways in Japanese
You also want to protect a logo
Your business spans several classes
You need to launch in Japan quickly and cannot afford a refusal

BrandAgent's prior search

If you instruct us to file, the prior trademark search is free of charge. A licensed patent attorney — not an assistant — reviews the results personally and tells you how likely the mark is to be registered and which classes you need. With more than 4,000 applications filed, we know where Japanese examiners tend to draw the line.

Attorney fees: filing JPY 25,000 per class; registration JPY 25,000 per class (excluding Japanese consumption tax, where applicable).

FAQ

Q. Is a search legally required before filing?
A. No, but we strongly recommend it. It reduces the risk of an Office Action, a refusal and having to rebrand.
Q. Our mark is registered in China. Do we still need to search in Japan?
A. Yes. Trademark rights are national. A Chinese, Korean or other foreign registration does not prevent an earlier Japanese mark from blocking yours.
Q. A similar mark was found. Is it over?
A. Not necessarily. Adjusting the goods/services or the mark itself often makes registration possible.
Q. Can we see the search result before deciding to file?
A. Yes. We report our view on registrability first, and you decide whether to go ahead.

Summary

Key points

Japan is first-to-file; a foreign registration does not protect you in Japan.
Search exact matches, script variants, Japanese pronunciation, goods/services and logo elements.
Pronunciation in katakana is the layer foreign applicants most often miss.
Check pending applications, not just registrations.
BrandAgent's search is free when you instruct us to file.

Planning to protect your brand in Japan?
Tell us your mark and your products — we will reply with the classes you need and a fixed quote, free of charge.

BrandAgent Patent Office (Kyoto, Japan)
Toru Kano, Japanese Patent Attorney

Get a free quote for your Japanese trademark