A foreign group decides to move an employee from one entity to another within Japan — a Tokyo subsidiary to a regional affiliate, a manufacturing arm to the holding company, a sales entity to a newly formed joint venture. Internally, this gets described in one sentence: “we’re transferring her over.” HR sends a notice, updates the org chart, and expects the employee to start at the new entity the following month.

The single word “transfer” is doing a lot of unexamined work in that sentence. Japanese employment law recognizes several distinct types of internal move, and they are not interchangeable. Some can be ordered unilaterally, with no individual consent required beyond what the employment rules already provide for. Others require the employee’s specific, individual agreement, and proceeding without it does not just create a compliance gap — it can render the move legally ineffective, leaving the employee’s original employment relationship intact regardless of what the org chart says.

This article walks through the four categories — reassignment and relocation within the same employer, secondment to another entity, and transfer of employment to another entity — what authority the company has for each, and where the line between “we can just order this” and “we need this person to sign off” actually sits.

Why “It’s Just an Internal Transfer” Is the Phrase That Gets HR Teams Into Trouble

The phrase “internal transfer” is doing real harm here precisely because it flattens four legally distinct moves into one. A reassignment to a different department, a relocation to a different city, a secondment to an affiliate while staying employed by the original company, and a full switch to a new employer within the group are treated, in everyday HR language, as variations on the same theme. Under Japanese employment law, they are not variations on a theme — they are different legal acts with different consent requirements, and getting the category wrong is the single most common way foreign companies end up with a move that does not actually hold up.

The risk is compounded by group structure. A foreign company moving someone between two entities it owns tends to view the move as internal almost by definition — both entities answer to the same headquarters, the employee’s badge and benefits may barely change, and the whole exercise feels administrative rather than legal. Japanese law does not extend that informality to the most consequential category of move, regardless of how closely related the two entities are within the group. The underlying structure of the employment relationship — and how Japanese law treats the employer as the legal counterparty, group affiliation notwithstanding — is covered more broadly in Hiring Employees in Japan: Legal Considerations for Foreign Companies.

What the Company Can Order Without Consent — and Where That Authority Ends

The two most flexible categories are reassignment to a different role or department (配置転換) and relocation to a different work location (転勤), both occurring within the same employer. Where the employment rules (就業規則) and the employment contract contain a basis for the company to make such assignments — language reserving the right to assign duties and work locations as business needs require — the company can generally order these moves unilaterally, unless the employment contract or the circumstances of hire include a specific limitation on role or location that restricts that authority. Where no such limitation exists, the company can generally proceed without obtaining the individual employee’s separate consent for each instance.

This authority is broad but not unlimited. Even with a clear basis in the employment rules, a reassignment or relocation order can still be found to constitute an abuse of the employer’s right to order it — for example, where the order is shown to serve no legitimate business purpose, where it is motivated by an improper purpose such as retaliation, or where it imposes a burden on the employee plainly disproportionate to any ordinary expectation, such as where the employee faces personal or family circumstances — a spouse’s medical condition, childcare obligations, or other comparable factors — that make the specific move unreasonably severe given all the circumstances. The basis for the order existing in the employment rules is necessary but not sufficient; the order also has to survive scrutiny as a legitimate exercise of that authority rather than its abuse.

For foreign HR teams, the practical takeaway is that this category — the one most home-market “at-will reassignment” instincts map onto reasonably well — does work largely as expected, provided the employment rules contain the right language and the move is not used in a way that looks punitive or arbitrary. Whether the employment contract and employment rules actually contain language that supports this kind of unilateral authority is itself worth confirming rather than assuming; what belongs in the employment contract to support exactly this kind of flexibility is addressed in Drafting Employment Contracts in Japan: Must-Have Clauses and Pitfalls.

Secondment vs Transfer of Employment: A Distinction Foreign Companies Often Miss

Once a move crosses from one entity to another, the legal picture changes — and changes differently depending on which of two distinct arrangements is actually involved. Secondment (在籍出向) keeps the employee’s original employment contract with the original employer intact, while the employee works under the day-to-day direction of a different entity, typically an affiliate within the group. Transfer of employment (転籍, sometimes called 移籍出向) is structurally different: it ends the original employment relationship and replaces it with a new employment contract at the receiving entity.

That structural difference is also what determines the consent requirement, and it is where the gap between the two categories opens up. Secondment, because the original employment relationship continues, can in some circumstances be ordered on a basis comparable to reassignment — where the employment rules or a labor agreement contain a sufficiently specific basis for secondment — and where the conditions of the secondment, including its duration, the nature of the role, and the working conditions at the receiving entity, are within what the employee could reasonably have anticipated from that basis — individual consent for each instance may not be strictly required. Courts, however, tend to construe that basis narrowly: a general clause referencing “reassignment” without specifically addressing secondment to another entity, or a clause that does not give the employee meaningful notice of what working conditions at the seconded entity might look like, is less likely to be treated as sufficient authority on its own.

Transfer of employment is a different matter altogether, addressed in the next section, but the distinction matters here because foreign companies frequently fail to recognize which of the two they are actually doing. A move described internally as “secondment” that in substance ends the person’s employment with the original entity and substitutes a new employer is not secondment in the legal sense, regardless of the label used internally — and the consent analysis that applies is the one for transfer of employment, not the more flexible secondment standard. The practical and HR considerations specific to bringing someone into Japan on secondment are addressed separately in Secondments to Japan: Employment, Tax, and HR Risk Checklist, which assumes the secondment structure is correctly identified in the first place.

When a Group Transfer Actually Requires Employee Consent

This is the section that resolves the question most foreign HR teams actually came here with: when does a move within the group require the employee’s individual, affirmative consent, rather than relying on a general clause in the employment rules?

Transfer of employment is the clearest case. Because it terminates the original employment relationship and replaces it with a new contract at a different legal entity, the employee’s individual consent is treated as essential — not a procedural nicety that a sufficiently broad employment-rules clause can substitute for, but a substantive requirement going to whether the new employment relationship was validly formed at all. A general reference to “the company may reassign employees as needed” in the employment rules does not extend to authorizing a change of employer; the two are not the same kind of authority, however adjacent they may look in an HR policy document.

The practical line, then, runs roughly as follows: reassignment and relocation within the same employer generally do not require fresh individual consent for each move, provided the employment rules support it and the order is not abusive. Secondment occupies a middle position — sometimes orderable without fresh individual consent where the basis is specific enough, sometimes not, depending on how the clause is drafted and how significantly the seconded role differs from the original. Transfer of employment sits at the far end: individual consent is required — specific to the particular transfer, the receiving entity, and the conditions of employment at that entity — and a general employment-rules clause is not sufficient to provide it, and a transfer carried out without it is exposed to being treated as ineffective, leaving the employee’s original employment relationship intact as a matter of law regardless of what internal paperwork says otherwise.

The Consent Requirement That Cannot Be Worked Around

This is the single most consequential misunderstanding in the entire transfer landscape, and it deserves to be stated plainly rather than folded into the general framework above: where a move is, in substance, a transfer of employment, the employee’s individual consent cannot be supplied by a clause in the employment rules, by a general acknowledgment signed at the time of hire, or by the fact that the receiving entity belongs to the same corporate group. Courts treat this requirement as going to the foundation of the new employment relationship, and a transfer pushed through without genuine, specific consent runs a real risk of simply not having happened in the eyes of the law — the employee remains, legally, employed by the original entity, with whatever practical confusion that creates for payroll, benefits, and supervision in the meantime.

The failure pattern that produces this outcome is rarely a deliberate attempt to bypass the requirement. It is usually a labeling problem: a move that is functionally a transfer of employment gets called a “reassignment” or “secondment” internally because that is the vocabulary the HQ HR system uses for any move between entities, and the team executing it never separately asks which Japanese legal category the move actually falls into. By the time the mislabeling is discovered — often when the employee disputes the move, or when an unrelated audit surfaces it — the company may be dealing with an employment relationship that, legally, never moved at all.

A Checklist by Transfer Type: What to Prepare Before You Move Someone

Before initiating any internal move, identifying which of the categories actually applies — and preparing accordingly — avoids most of the problems above:

• Reassignment / relocation within the same employer: confirm the employment rules contain a clear basis for assigning duties and work locations, and document a legitimate business reason for the specific move to guard against an abuse-of-right challenge.
• Secondment to another group entity: confirm whether the employment rules or a labor agreement specifically address secondment (not just general reassignment), and assess whether the conditions at the seconded entity are different enough from the original role that individual consent should be obtained even if not strictly required.
• Transfer of employment to another group entity: treat individual, informed, documented consent as mandatory in every case, obtained specifically for this move rather than inferred from a general onboarding acknowledgment.
• Any cross-entity move, regardless of label: confirm internally which legal category the move actually falls into before describing it to the employee or to HQ, since the label used in internal communications has no bearing on which consent standard a court will apply.
• Documentation: retain the employment rules provision relied upon, the business rationale for the specific move, and — where consent is required — consent that specifically identifies the new employer, the conditions of employment at the receiving entity, and the nature of the role — obtained in writing as a matter of strong practical recommendation, since written documentation is what allows the company to demonstrate the consent was genuinely specific and informed rather than a general acknowledgment, not a generic acknowledgment signed at an earlier point in time.

Read together, the checklist points to one habit worth building into any cross-entity move: identify the legal category first, and only then decide what process and documentation the move requires — rather than starting from the internal label and working backward into whatever paperwork seems sufficient.

Conclusion

The word “transfer” hides a real legal fork in the road. Reassignment and relocation within the same employer are, in most cases, squarely within the company’s authority to order, subject to the employment rules actually supporting it and the order not being abusive. Secondment sits in between, its flexibility depending heavily on how specifically the basis for it was drafted. Transfer of employment is different in kind, not just degree — it ends one employment relationship and starts another, and the employee’s individual consent is not something a well-drafted employment-rules clause or group affiliation can substitute for.

The companies that avoid trouble here are the ones that ask, before anything is communicated to the employee, which of these four categories the planned move actually is — and then build the process around that answer, rather than around whatever the internal HR system happens to call it. The legal question is rarely whether an employee is moving. It is whether the legal employer is changing — because that answer determines the consent requirement and the entire process.

Planning an Internal Transfer, Secondment, or Relocation in Japan?
 Our team regularly helps foreign companies confirm which category a planned employee move falls into and what consent and documentation it requires.

If you are planning an internal transfer, secondment, or relocation within Japan and want to confirm what type of consent is required, our team is happy to walk through the situation with you. Contact the TSL Partners – International Business Desk