Foreign companies deciding to put a person on the ground in Japan usually reach for one of two structures before they have committed to a full subsidiary: hire the person through an Employer of Record (EOR), or register a branch office and employ them directly. Both avoid incorporating a KK or GK. Both let you have a legal, compliant Japan hire within weeks rather than months. But they solve different problems, and picking the wrong one creates a cost or a tax exposure that does not show up until later. This guide compares the two structures on the questions that actually decide it: setup time, ongoing cost profile, liability exposure, and what happens when the arrangement needs to scale or unwind.
What Each Structure Actually Is
EOR (Employer of Record): a Japan-resident entity, in this case Aplash, becomes the legal employer of record for your hire. The worker performs services for your business under your direction, but the EOR entity signs the Japanese employment contract, runs Japanese payroll, withholds income tax, and enrolls the employee in Japan's mandatory social insurance and labor insurance programs. Your company pays the EOR a service fee plus the underlying employment cost; you never register a Japan entity of your own for this purpose.
Branch office (支店, 外国company registration): your existing foreign company registers a branch with the Legal Affairs Bureau (法務局) under the Companies Act (会社法). The branch is not a separate legal entity; it is the same legal person as the parent, operating in Japan. Your foreign company becomes the direct employer, with the branch as the local operating presence, and you handle Japan payroll and social insurance registration under the branch's own registration.
Neither structure requires incorporating a new Japanese company. That is precisely why they get compared against each other, and why founders often assume they are interchangeable. They are not.
Setup Timeline: EOR Wins Decisively for a Single Hire
An EOR arrangement can typically have an employee legally on payroll within one to a few weeks: the EOR provider drafts and executes the Japanese employment contract, registers the employee for health insurance, pension, and labor insurance, and runs the first payroll cycle. No government registration is required on your side because you are not the direct employer of record.
A branch office requires registering the branch itself before any employee can be lawfully employed under it: appointing a Japan-resident representative (日本における代表者), apostilling and translating the parent company's constitutional documents, and filing the registration application with the Legal Affairs Bureau. That registration step alone typically takes several weeks once documents are in order, before payroll and social insurance registration for the employee can even begin. If your only goal is "get one person legally paid in Japan as soon as possible," EOR is structurally faster because it skips an entity-registration step entirely.
Liability and Employer Exposure
Under EOR, the EOR entity is the named employer on the Japanese employment contract and carries the direct statutory employer obligations: dismissal procedure under the Labor Standards Act (労働基準法), social insurance enrollment, and payroll withholding compliance. Your company directs the work but does not sit as the counterparty on the Japan employment contract itself.
Under a branch office, your foreign company is the direct employer. Japan labor law applies in full regardless of entity type: dismissal is difficult, statutory notice and severance exposure apply, and your parent company bears that liability directly rather than through an intermediary. A branch also creates unlimited parent liability for branch debts generally, a broader exposure than the employment relationship alone, which is a separate reason many companies choose a subsidiary over a branch once operations mature (see Japan Branch Office vs. Subsidiary for that comparison).
The Tax Question a Branch Office Forces and EOR Avoids
This is where the two structures diverge most sharply, and where founders most often get surprised later. A branch office is, by definition, a permanent establishment (PE) in Japan: the National Tax Agency (NTA) taxes the branch on Japan-source income at standard Japanese corporate tax rates, and your company takes on Japan corporate tax filing obligations from the point the branch is active.
A properly structured EOR arrangement is designed to avoid creating a PE for your company: the EOR entity, not your business, is the Japan employer of record, and your company's activity in Japan is limited to directing work performed by someone else's legal employee. This is not automatic. Whether an EOR arrangement actually avoids PE risk depends on facts specific to the engagement, including what the worker is authorized to do, whether they can conclude contracts on your company's behalf, and how the relationship is documented. For the fact pattern that most commonly turns a "safe" EOR hire into a PE exposure, see Does Hiring in Japan Through an EOR Create Permanent Establishment Risk for Foreign Companies?. The short version: if your Japan-based hire is limited to non-contract-concluding functions such as engineering, support, or market research and the EOR relationship is properly documented, PE risk is generally manageable; the moment that person starts negotiating and concluding sales contracts on your company's behalf, the analysis changes and should be reviewed before it happens, not after.
Cost Profile: Different Shapes, Not Just Different Sizes
A branch office carries a government registration fee, translation and apostille costs for the parent's constitutional documents, and the ongoing cost of Japan corporate tax compliance (filing, and in most cases a Japan-based accountant) once the branch is active, on top of the employee's direct payroll and social insurance cost. Those are largely fixed costs that do not scale down for a single hire.
An EOR arrangement carries a service fee layered on top of the employee's payroll and statutory social insurance cost, but no separate government registration fee and no separate corporate tax filing obligation for your company in Japan, because your company is not the registered Japan entity. For one or two hires, this generally produces a lower total first-year cost than standing up a branch purely to employ them. The cost comparison inverts as headcount grows: EOR service fees are charged per employee, while a branch office's fixed registration and compliance costs get spread across a larger team, and at some headcount and revenue scale a full subsidiary, not a branch, becomes the more relevant comparison. See Japan EOR Total Cost of Employment Guide for how the per-employee EOR cost is actually built.
When a Branch Office Is Actually the Better Fit
EOR is not automatically the right answer just because it is faster and cheaper for one hire. A branch office (or, more often, a subsidiary once the branch's unlimited parent liability becomes unattractive) is the better fit when:
(a) The Japan operation is expected to generate Japan-source revenue directly, not just employ people who support a foreign-billed business; a revenue-generating presence in Japan needs to be a registered taxpayer regardless of how the employees are structured.
(b) You need the Japan presence to hold contracts, licenses, or bank accounts in its own name, which an EOR arrangement, by design, does not provide since the EOR is the employer, not a business registration for your company.
(c) Headcount is expected to scale well beyond a handful of hires within the first year or two, at which point the fixed costs of a registered entity are spread across more people and an EOR's per-employee fee stops being the cheaper structure.
When EOR Is the Better Fit
(a) You need one hire, or a small initial team, on the ground quickly to test the market before committing to any Japan entity.
(b) The hire's function is limited to support, engineering, or research, without contract-concluding authority on your company's behalf, keeping PE risk manageable.
(c) You are not yet certain whether Japan will justify a permanent local entity, and want to preserve the option to walk away without an entity to deregister.
Decision Framework
If the honest answer to "how many people, doing what, for how long" is "one or two people, non-contract-concluding roles, testing the market for the next 6 to 18 months," EOR is generally the faster and lower-friction path. If the honest answer is "we already know we are building a revenue-generating Japan operation and need a registered local presence," a branch office, or more commonly a subsidiary, is worth the longer setup and higher fixed cost from the start. The mistake to avoid is defaulting to a branch office because it "sounds more established," without first modeling whether the registration and tax-filing burden it creates is actually justified by what the Japan hire is there to do.
For the full three-way comparison including a subsidiary, see Japan Branch Office vs. Subsidiary. For the mechanics of standing up an EOR hire from scratch, see How to Hire Your First Employee in Japan Without Setting Up a Company.
This article is for informational purposes only and does not constitute legal or tax advice. Permanent establishment risk assessment depends on the specific facts of a given engagement and should be reviewed with a qualified advisor before structuring a Japan hire. Last updated: 2026-07.