Switching EOR providers in Japan starts with identifying the legal employer on each side and agreeing how employment will move. If the employer changes, an employee-approved transfer of the existing contract may be possible. Fresh employment is a different route, with different rights and settlement consequences. Changing the service agreement alone does not accomplish either.
Japan adds two practical checks: whether the supervision arrangement falls under worker-dispatch rules, and whether a foreign employee’s permission allows work for the incoming employer. Settle those questions before asking anyone to resign or closing payroll. Below, EOR A is the outgoing employer and EOR B is the incoming employer.
Rules checked October 30, 2026.
What changes when you switch EOR in Japan?
Compare the signed employment contract, amendments, payslips and insurance records with the incoming employer’s proposed documents. A brand, platform or corporate-register entry identifies a business; it does not prove the employment-transfer mechanism.
| Situation | Legal mechanism to verify | Evidence required | Implication |
|---|---|---|---|
| Only the service or platform changes | Existing employment continues with the same legal employer | Same contracting entity; unchanged employment obligations; amended service and data arrangements | Avoid unnecessary employee termination and insurance exits |
| Different employers agree to transfer the existing contract | Consensual transfer of contractual status | Agreement between A and B; employee consent; exact obligations and effective date | Document the continuing contract and responsibility for existing rights |
| A genuine merger or company split occurs | Applicable corporate succession rules | Transaction documents; affected contracts; statutory notices, consultation and objection process | Apply the actual restructuring regime; a supplier switch does not establish one |
| Existing employment ends and B hires afresh | Valid termination or mutual ending plus new employment | Lawful exit basis; employee agreement where relevant; signed B terms; rights settlement | Determine what survives by law, what B recognizes and what A must settle |
Civil Code Articles 539-2 and 625 provide the consent framework for transferring contractual status and an employer’s rights. They do not make every commercial EOR switch an automatic employment transfer.
For an actual business transfer, Japan’s revised transfer guidance, applicable from May 25, 2026, requires individual employee consent and explains prior discussion of the transferee, employment conditions and transaction circumstances. Company splits have a separate succession framework.
Also verify who directs the work. Under the Worker Dispatching Act, employing someone to work under another party’s direction can constitute worker dispatch; operating that business requires a licence. B must explain the permitted structure for the actual client, workplace and duties, including a cross-border supervision chain. Incorporation alone is insufficient. If B cannot substantiate the route, defer the employment move while the parties establish a lawful alternative.
Review the existing service and employee position
Review the commercial agreement separately from the employee’s position. The client can owe a contractual fee even when an employee cannot move on the proposed date.
Commercial agreement checklist
- Identify the contracting supplier and the actual employing entity, including any local partner.
- Check notice receipt, renewal, minimum term, exit charges, continued service during an extension and dispute handling.
- Identify payroll cutoffs, funding deadlines, deposits, permitted offsets, refund conditions and final reporting duties.
- Agree who exports records, who retains originals and who handles later corrections or claims.
Employee arrangements checklist
- Verify employer, start date, fixed or indefinite term, probation, job, workplace and supervision.
- Reconcile salary, overtime, allowances, bonuses, equity documents, leave balances, retirement arrangements and benefits.
- Identify pregnancy, protected leave, pending benefit claims, grievances, litigation and collective agreements.
- Check nationality or residence status, designated employer where applicable, insurance identifiers, wage periods and actual pay dates.
- Obtain assignment history where dispatch applies. Do not replace the historical start date with B’s onboarding date.
The Labor Contract Act makes dismissal without objectively reasonable grounds and social acceptability invalid. Fixed-term dismissal before expiry requires unavoidable circumstances. A commercial cancellation does not establish those grounds. If a lawful dismissal is actually contemplated, the separate dismissal notice rule generally requires 30 days’ notice or the corresponding average-wage payment, subject to statutory exceptions. Payment alone does not cure an invalid dismissal.
Establish transfer and continuity treatment
Create a signed rights schedule before finalizing employment documents. An original start date printed in B’s system is too vague: specify which entitlements use it and which liabilities move.
| Item | Statutory treatment to verify | Recognition or settlement needed | Who confirms |
|---|---|---|---|
| Prior service and probation | Effect of the selected mechanism on the existing contract | Record original service date and treatment of probation; identify any proposed change | A, B and employee; Japanese employment adviser |
| Annual paid leave | Statutory entitlement and substantive continuity of employment | Reconcile days, grant dates, expiry and leave already taken; specify B’s obligation or A’s exit treatment | A and B payroll/HR |
| Notice and retirement payments | Dismissal protections; applicable contract, work rules or retirement scheme | Allocate accrued obligations and any agreed settlement; avoid a universal severance formula | A and B with employee |
| Protected leave and benefits | Eligibility and ongoing claims under the relevant scheme | Confirm benefit administrator, insurance transition, dependants and any private-cover waiting period | B and scheme administrators; A supplies history |
| Bonus, equity and allowances | Governing employment and separate plan terms | Identify earned amounts, payment owner and any plan-specific employer-change condition | A, B and client/plan issuer |
| Fixed-term and dispatch history | Conversion rights, renewal protections and assignment limits are distinct questions | Preserve contract and assignment history; determine the applicable treatment explicitly | A, B and receiving client |
| Immigration | Whether the existing status permits the new employer and duties | Obtain necessary permission and complete applicable notifications | Employee and incoming employer’s immigration lead |
For annual leave, MHLW says continuous employment is assessed against the substance of the employment relationship. Do not assume paperwork resets entitlement, or promise that every entitlement carries merely because B recognizes seniority.
Dispatch has a separate clock. MHLW identifies two period limits: establishment and individual organizational-unit limits, generally three years. Indefinitely employed dispatched workers and certain other categories are exceptions. Its receiving-employer guidance expressly counts the same worker’s time in the same organizational unit across different dispatching employers. Changing agencies does not itself reset that time. Check the establishment’s separate consultation requirements too.
For a genuine business transfer, allow sufficient time for informed individual consent and applicable union discussions. The May 2026 guidance does not treat refusal to consent as a sufficient reason for dismissal. For an ordinary contractual transfer, explain the agreement and proposed changes clearly; do not impose an invented nationwide consent deadline.
Set one coordinated cutover calendar
The following is a hypothetical case, continued through the cash and payroll checks below. The employee is a Japanese citizen on an indefinite contract. A, B and the employee agree to transfer the existing contract, effective Tuesday, December 1, 2026, under the consent framework above. Assume both providers have substantiated the permitted arrangement for this role and supervision structure.
The agreement preserves the existing terms, original service date and eight verified unused leave days with their existing expiry dates, with no new probation. A retains the obligation to pay November wages; B assumes December wages and the scheduled continuing obligations. This allocation is an express scenario assumption, not an automatic statutory result for every switch.
Assume the commercial contract requires 30 calendar days’ notice, accepted on Friday, October 30 for a November 30 service end, with a written extension option. Monthly base salary is paid on the 25th for that calendar month; no variable pay is assumed. Use the actual pay cycle when adapting these dates.
| Milestone | Dependency | Outgoing EOR | Incoming EOR | Client or employee action | Completion evidence |
|---|---|---|---|---|---|
| October 30: commercial notice | Actual notice clause and extension agreement | Acknowledge receipt and scope | Confirm proposed capacity | Client serves notice; employee receives an explanation | Receipt and extension terms |
| November 13: documents for review | Employer identities and route established | Provide contract, balances and assignment history | Supply transfer terms, rights schedule and benefit plan | Employee reviews; client supplies accurate job/supervision details | Matched documents and open-question list |
| November 20: readiness gate | Agreed documents and required employee consent; permitted route; benefits and payroll plan confirmed | Confirm existing obligations and continuing support | Confirm legal employer, permissions if needed, December 1 cover and first-payroll owner | Confirm informed consent; client confirms approved funding | Signed documents and readiness record; employment remains with A |
| November 25: last ordinary A payroll | November 1 to 30 base salary verified | Pay November salary | Test December calculation without releasing wages | Employee checks payslip | A payment receipt; separate B test file |
| November 27: final reconciliation and funding | Gate still satisfied; secure records validated | Resolve balances; confirm no extra live salary instruction | Receive December funding and approve payment controls | Client funds B; employee receives final handoff | Bank receipt, payroll signoff, rights schedule |
| November 30: last day under A | All transfer conditions remain satisfied | Close responsibility through this date under the agreement | Confirm December 1 activation | Parties implement agreed transfer; no resignation is assumed | Effective transfer confirmation |
| December 1 to 4: coverage and filings | A coverage through November 30; B from December 1 | Submit applicable loss notifications | Activate benefits; submit applicable acquisition notifications | Employee checks access and dependants | Submission receipts and coverage confirmation |
| December 25: first B payday | December 1 to 31 base salary; test passed | Supply outstanding historical corrections | Release December salary once | Client reviews cash; employee checks payslip | Payment and exception reconciliation |
November 23 is a national holiday; the example places its gate before that holiday. November 30, December 1 and December 25 are weekdays and are not Japanese national holidays. Confirm each party’s banking and office cutoffs separately.
For covered employees, health/pension acquisition and loss filings generally have a five-day submission requirement. The example targets submission by December 4, rather than relying on a weekend deadline. Have the administrators confirm the actual employer-change filing treatment. Employment insurance has different deadlines: acquisition by the tenth of the following month; loss within ten days counted from the day after the loss event. Plan both submissions during the first cutover week.
If the November 20 gate or November 27 reconciliation fails, the client owns the extension decision with A and B. Defer the effective transfer before A closes employment or coverage. Keeping work with A is contingent on A’s continued lawful employment and the employee’s permission; a funding promise from B cannot bridge an authorization gap.
Reconcile transition costs and cash
Keep employee entitlements, supplier charges and client funding in separate ledgers. Not every row below applies to every switch.
| Fee, liability or funding item | When due | Responsible party | Refund or settlement treatment |
|---|---|---|---|
| A’s notice-period service or exit fee | Actual commercial terms | Client under its contract | Confirm disputed amounts and agreed final invoice |
| November wages and corrections | Agreed wage dates and applicable law | A under this scenario’s allocation | Prove payment; retain a correction owner |
| Leave or retirement settlement | Only if the mechanism and entitlement require it | Party legally liable under the documents and rules | Case example carries eight days to B; no duplicate cash settlement is assumed |
| Notice pay or negotiated exit payment | Only if applicable to the actual exit | A as employer, with contractual client funding where agreed | Separate statutory entitlement from supplier reimbursement |
| Benefit or service overlap | Agreed coverage and service dates | A/B administer; client funds agreed charges | Explain any temporary overlap and reconciliation |
| A’s retained deposit | Contractual reconciliation date | A accounts to client | Confirm deductions and refund date; do not treat it as cash already available at B |
| B’s first payroll and employer costs | B’s verified funding cutoff | Client funds; B pays and remits | Reconcile unused funding against the agreed ledger |
Worked cash control: assume A paid JPY 600,000 gross each month from January through November, including November on the 25th. Verified historical gross is 11 × JPY 600,000 = JPY 6,600,000. B’s December salary is JPY 600,000, making full-year gross JPY 7,200,000. Import JPY 6,600,000 as prior-employer history, with zero live payment attached. Fund B for the new JPY 600,000 gross salary component, plus separately calculated employer charges, fees and any other approved liabilities. This is not a net-pay calculation or the total funding invoice.
That distinction matters for Japan’s year-end adjustment. An eligible midyear joiner’s previous salary, withholding and social-insurance deductions must be verified, normally through the previous employer’s withholding certificate. Prior gross is tax history, not another December salary. B must establish whether the employee qualifies for adjustment and obtain the actual figures.
Pension contributions also need a month-boundary check. The Japan Pension Service explains that loss normally occurs the day after leaving, with contributions due through the month before loss. Under the example’s confirmed enrollment treatment, A accounts for November and B for December. Check the contribution month separately from the payslip deduction month.
If the chosen route actually ends employment, an employee request can trigger the Labor Standards Act’s seven-day rule for outstanding wages and employee property; disputed amounts do not justify withholding the undisputed part. Do not assume a supplier’s refund timetable controls employee payment.
Test the first payroll and close the old arrangement
Treat each item as pass or fail. A failed material item needs an owner and resolution before the affected payment or cutover proceeds.
- Wage period: A covers November 1 to 30 and B December 1 to 31 in the example. Separate any later correction from fresh earnings.
- Historical values: reconcile gross, withholding and social-insurance deductions to source records; distinguish prior-employer values from B’s earnings.
- Deductions and contributions: B validates the current tax inputs, insurance basis, applicable scheme and deduction month. Transfer pension and employment-insurance identifiers accurately.
- Benefits: confirm actual December 1 eligibility, dependants, access documents and any private-cover conditions. Platform access alone does not establish cover.
- Balances: reconcile eight carried leave days, expiry dates, bonuses, expenses and outstanding claims against the signed allocation.
- Duplicate prevention: test calculations in parallel, then authorize only the intended live pay file. B’s test must not release a second November payment.
- Filings and records: retain submission evidence, resolve rejected filings, arrange withholding certificates and confirm municipal resident-tax collection treatment where relevant.
- Cash: reconcile A’s final ledger and any deposit separately from B’s funding, wages and remittances.
Send the employee a clear handoff with the November 13 documents: employer names, December 1 effective date, agreed service and leave treatment, pay dates, benefits and contacts. Explain which rights follow the legal mechanism and which are express commitments. The example asks for review by November 20, an agreed planning date rather than a statutory deadline. A answers historical-pay and balance questions; B answers contract, coverage and December payroll questions; the client explains operational supervision.
Use a restricted, encrypted transfer process with named recipients and a defined lawful basis for each data category. My Number information needs particular care: the privacy regulator’s FAQ requires consent for the specified employer-to-employer provision under that route after the destination is determined and disclosed. A blanket consent obtained at initial hiring is insufficient for that purpose. Do not circulate identifiers through the client’s general project tracker.
If A delays or refuses records, B’s payroll lead owns a documented recovery plan. Minimum verified inputs include the contract and amendments, identity/right-to-work evidence, wage and tax history, insurance identifiers, leave ledger and relevant assignment history. Employee-held documents or official records may help reconstruct a record only through lawful collection and validation. Unverified totals cannot become live opening balances. If year-end history remains unverified, NTA says the employer cannot perform the affected year-end adjustment; the employee must settle through a tax return. Explain that consequence separately from any decision to defer a cutover whose essential employment or payroll records remain insufficient.
Two employee situations that change the switch
1. A worker with independent authorization
The hypothetical Japanese citizen above needs no employer-linked immigration change. That removes one dependency. It leaves consent, the permitted employment structure, rights allocation and payroll readiness intact.
If the gate passes, the existing contract transfers on December 1; B carries the eight documented leave days and the agreed service treatment, and pays December salary on December 25. The example achieves a conditional, documented outcome. It does not promise preservation of an unidentified benefit or erase A’s retained obligations.
2. A worker whose permission names the employer
Assume a second employee holds Highly Skilled Professional (i)(b) status with A as the designated institution. ISA’s HSP guidance, Q49, says changing the designated institution requires a change-of-status application even when remaining in HSP(i). B’s proposed date is insufficient: obtain the necessary permission before work under B’s arrangement begins. An application receipt does not establish permission for new activities.
Different statuses have different procedures. For covered contract-based statuses, institutional changes generally require notification within 14 days. ISA’s notification FAQ also identifies an exception where change-of-status permission has already been obtained in connection with the move. Check the actual sequence rather than filing blindly or treating notification as permission.
A and B must also check their separate foreign-worker employment reports. For employment-insurance-covered foreign workers, the hiring and separation reports generally use the insurance qualification forms. These employer reports do not replace the employee’s applicable ISA procedure.
If permission is outstanding on November 20, this employee does not pass the example’s gate. Retain the existing lawful arrangement if possible, or defer and arrange an authorized contingency. Do not ask the employee to exit A first and assume they can continue the same work while B waits.
Questions about switching EOR in Japan
Must employees resign to switch providers?
No universal resignation step applies. Establish whether the employer stays the same, the existing contract transfers with consent, a qualifying restructuring applies, or validly ended employment is followed by a new contract. Use documents matching that mechanism.
Can we retain the employee’s original start date?
Record it, but also document its legal and contractual effect for each right. Leave, retirement arrangements, fixed-term history and private benefits can require different treatment. A seniority field cannot settle those questions.
Does switching agencies restart Japan’s dispatch limit?
No automatic reset follows. For the same worker in the same organizational unit, time can count across dispatching employers. Check the individual and establishment limits and any genuine statutory exception.
Can the switch happen at any point in the year?
The permissible date follows the route, consent, permissions, benefits and payroll readiness. A December switch also puts prior-employer tax records close to year-end adjustment. Build the calendar around those dependencies and the actual contracts.
Can we complete the switch while a worker is on leave?
Treat it as an individual case. Establish the continuing contract or new-employment route, protected status, insurance and benefit eligibility before agreeing an effective date. Obtain administrator confirmation of ongoing claims rather than promising that a transferred leave balance preserves every benefit.
Borderless AI’s EOR services cover employment contracts, payroll and benefits administration. To discuss a Japan switch, bring the employing entities, supervision arrangement, employee category and proposed date. Ask us to assess whether the particular arrangement can be supported before committing to an employee exit.
