Do You Need a Trademark in Japan? Risks of Not Registering for Overseas Brands

"We are only testing the Japanese market — do we need a trademark yet?" "Nobody has copied us so far, so why bother?"

In this article, Japanese Patent Attorney Toru Kano of BrandAgent explains whether trademark registration in Japan is really necessary, and what can happen if you do not register — written for overseas companies, individuals and cross-border e-commerce sellers.

Conclusion first

Registration is not mandatory for everyone, but it is very important if you will invest in a brand name in Japan.
The main reason: it reduces the risk of someone else taking your name first.
The risks of not registering: forced rebranding, warning letters, and difficulty stopping copycats.
It matters most if you will use the name long term, advertise, sell on Amazon Japan / Rakuten, or expand through distributors.

Why register a trademark in Japan at all?

The purpose is simple: to keep using your brand name in Japan with confidence. This applies to company names, brand names, product names, service names, logos, store names and app names.

The more value the name gains through advertising, social media, reviews and sales, the more unstable your position becomes without a registration. And because trademark rights are territorial, your registration at home does not help you in Japan.

What happens if you do not register?

Problems do not always appear immediately. But there are four main risks.

1. Someone else registers your mark first

Japan is first-to-file. Even if you have used the name for a long time, a third party who files a similar mark first can put you in a difficult position. For overseas brands, the most common cases are resellers, former distributors and squatters who register a brand that is starting to sell well in Japan. "We are already using it" is not enough.

2. You may have to change the brand name

Rebranding means redoing packaging, labels, your Japanese website, social media, marketplace listings and advertising. Beyond the cost, the recognition and reviews you have built up are lost. On marketplaces, a forced name change can also mean losing listing history.

3. You may receive a warning letter

A trademark right covers similar marks used on similar goods/services. If you use a name close to someone's registered mark, you may receive a warning letter or a platform complaint, and your listings may be taken down. Whether there is actual infringement depends on the facts, but without your own registration you are always on the defensive.

4. It is hard to act against look-alikes

Without a registration, it is difficult to take a firm stand against third parties using similar names. With a Japanese trademark right, you can seek an injunction and damages, and you can use the registration for Amazon Japan Brand Registry and infringement reports on Rakuten and other platforms.

Who should consider registration most?

Brands that will keep using a product or service name in Japan
Businesses spending on advertising in Japan
Sellers on Amazon Japan, Rakuten, Yahoo! Shopping and other platforms
Brands planning to work with Japanese distributors, licensees or franchisees
Brands planning to expand into Japan as part of a multi-country strategy

One-off event names or names used only briefly may be a lower priority. The key question is: will you invest in this name in Japan?

Is a company registration enough?

No. Company registration and trademark registration are separate systems. Company registration concerns the company name as a legal entity; trademark registration protects a brand name in relation to specific goods and services. Even if you set up a Japanese subsidiary under the brand name, that does not give you a trademark right.

Is owning the domain enough?

No. A domain name is like an address on the internet; owning it does not create a trademark right. The same is true of a marketplace store name or a social media account — without a registration, your brand protection is not sufficient.

"We are small, so we don't need it yet" — true?

Half true, half dangerous. While you are small, disputes may not arise. But changing the name after you have grown costs far more: packaging, recognition, reviews, search rankings, followers and marketplace ratings are all affected.

In fact, squatters tend to target brands just as sales in Japan start to grow. The practical yardstick is not your size, but whether this is a name you intend to grow.

Are there cases where you can skip registration?

It is hard to say registration is ever completely unnecessary, but it can be a lower priority for:

Names used only for a short-term event
Product names you do not plan to use for long
Internal project names that are not used publicly

For any name you will keep using in Japan, it is safest to consider registration early.

The best time to file

Ideally, after deciding the name but before investing seriously in Japan:

Before launching the brand, product or service in Japan
Before launching a Japanese website or starting advertising
Before opening a store on Amazon Japan, Rakuten or other platforms

If you filed at home within the last 6 months, you can claim Paris Convention priority for your Japanese application. If you are filing in many countries, a Madrid designation of Japan is another option, though if the JPO raises an objection, a Japanese patent attorney will be needed to respond.

What to do before filing

Decide which name and/or logo you want to protect
List the goods and services you sell or plan to sell in Japan
Check for earlier conflicting marks in Japan (prior search)
Prepare the applicant's name and address in the original language and in English

An applicant with no domicile or business office in Japan must file through a Japanese patent attorney. At BrandAgent, the prior search is free when you instruct us to file, and consultations and quotes are always free.

Not registering vs. registering

Item	Not registered	Registered
Stability of the name	Easily unstable	Easier to protect
Dealing with copycats	Difficult	Easier to act
Defense against warnings	Weak	More predictable
Platform brand protection	Limited	Available
Safety of brand investment	Low	High

FAQ

Q. Is trademark registration absolutely necessary?
A. Not for everyone, but it is important for any brand or service name you will keep using in Japan.
Q. Is it illegal not to register?
A. No. But using a name close to someone else's registered mark can cause problems.
Q. Our mark is registered in our home country. Isn't that enough?
A. No. Trademark rights are territorial; you need a Japanese registration.
Q. We are a small seller. Should we still register?
A. If you will keep using and growing the name in Japan, it is worth considering early, regardless of size.
Q. How much does it cost?
A. For 1 class, about JPY 79,200 (5 years) or JPY 94,900 (10 years) in total, including official fees and BrandAgent's fees of JPY 25,000 per class at filing and at registration (excluding tax, where applicable).

Summary

Key points

Registration is not legally required, but it is very important for names you will invest in in Japan.
Without it, you risk squatting, forced rebranding, warning letters and difficulty stopping copycats.
Company registration, domain names and store names are not substitutes.
File after deciding the name and before investing in Japan.
Foreign applicants must file through a Japanese patent attorney — every BrandAgent case is handled personally by a licensed attorney.

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