API-Governed Firms and External Dependency Enforcement

In Japanese employment law, shukko (出向) generally refers to a situation in which an employee remains employed by the original employer (shukko-moto / 出向元) but works for another company (shukko-saki / 出向先) under the latter's direction and supervision.

The most important statutory provision is Article 14 of the Labour Contract Act (労働契約法). It provides that where an employer has the authority to order a secondment, the order is invalid if, considering the necessity of the secondment, the circumstances concerning selection of the employee and other circumstances, it constitutes an abuse of rights. The Ministry of Health, Labour and Welfare describes Article 14 as principally addressing zaiseki-gata shukko (在籍型出向)—secondment while the employee remains employed by the original company.

1. Meaning of shukko

There are two important concepts:

A. Zaiseki shukko (在籍出向) — secondment while retaining employment

The employee:

• remains an employee of the original employer;
• works at the secondment company;
• is subject to the secondment company's day-to-day direction;
• normally has an employment relationship with the original employer throughout the secondment; and
• normally returns to the original employer when the secondment ends.

Japanese administrative guidance recognizes that, in a typical zaiseki shukko, employment relationships can exist with both the original and receiving employers, with the respective rights and responsibilities allocated according to the secondment arrangements.

B. Ishoku / ten-seki (移籍・転籍) — transfer of employment

Here the employee leaves the employment relationship with the original employer and becomes an employee of the receiving company.

This is materially different from shukko. Japanese case law generally requires the employee's individual consent for a true transfer of employment.

2. Why shukko is legally different from ordinary transfer

An ordinary internal transfer normally leaves the employee working under the same employer.

Shukko is more complicated because the employee's actual work is performed under another company's direction.

Thus, three relationships need to be considered:

1. Original employer ↔ employee
2. Receiving company ↔ employee
3. Original employer ↔ receiving company

The secondment agreement should therefore allocate responsibility for:

• work instructions;
• working hours;
• salary;
• overtime;
• leave;
• social insurance;
• workers' compensation;
• occupational safety;
• disciplinary authority;
• performance evaluation;
• confidentiality;
• intellectual property;
• expenses;
• business travel;
• harassment complaints;
• accident reporting;
• termination/return; and
• dispute resolution.

Japanese administrative guidance specifically recognizes that the Labour Standards Act and related legislation may apply to the original and receiving employers according to their respective contractual responsibilities.

3. Can an employer order shukko without individual consent?

Yes, potentially—but not automatically.

The leading principle is that an individual employee's consent is not invariably required for zaiseki shukko where:

• the employment contract or applicable work rules provide a sufficiently clear basis for secondment;
• a collective agreement contains appropriate provisions;
• the secondment system is sufficiently detailed;
• the employer has a legitimate business reason;
• the employee-selection criteria are reasonable;
• the employee does not suffer excessive disadvantage; and
• the order is not an abuse of the employer's rights.

The MHLW specifically identifies these factors in its explanation of the relevant case law.

However, a generic statement such as "the company may transfer employees anywhere" should not automatically be treated as unlimited authority to second an employee to another legal entity.

4. Labour Contract Act Article 14

Article 14 is central:

Where an employer is entitled to order secondment, an order becomes invalid if, considering the necessity of the secondment, the circumstances surrounding selection of the employee and other circumstances, it constitutes an abuse of rights.

The statutory test therefore requires consideration of several circumstances rather than a single factor.

Important considerations include:

Business necessity

Examples include:

• corporate restructuring;
• business outsourcing;
• group-company integration;
• temporary personnel shortages;
• training;
• transfer of expertise;
• establishment of a new subsidiary;
• rehabilitation of an affiliated company;
• business downturn;
• technology transfer.

Employee selection

The employer should have a rational basis for selecting the particular employee.

Working conditions

Courts may consider:

• salary;
• bonus;
• retirement benefits;
• working hours;
• location;
• commuting burden;
• job duties;
• career impact;
• housing;
• family circumstances.

Duration

A temporary secondment is generally easier to justify than an indefinite arrangement, although duration alone does not automatically invalidate a shukko.

5. Six important Japanese cases

Case 1 — Supreme Court, 19 October 1973

Supreme Court, Second Petty Bench, 19 October 1973

This is an important early authority concerning the legal foundation for zaiseki shukko.

The Court recognized the concept of secondment in which an employee retains employee status with the original company while working under the direction of another company.

The case is important because it established that a secondment arrangement cannot simply be treated as an ordinary internal transfer. A sufficiently clear contractual or employment-rule basis is important.

Japanese Labour Bureau guidance cites this Supreme Court judgment for the proposition that a zaiseki shukko order requires a clear basis in a labour-management agreement or work rules, unless it is otherwise based on individual agreement.

Principle:
The employer's authority to order secondment must have a legal/contractual foundation.

Case 2 — Nippon Steel / Nippon Steel Transportation Case

Supreme Court, Second Petty Bench, 18 April 2003

This is the leading modern Japanese Supreme Court case on shukko.

Nippon Steel outsourced an internal transportation function to another company and seconded employees to the receiving company while retaining their employment status.

The employees challenged the secondment orders.

The Supreme Court upheld the orders.

The Court emphasized that the employer could order secondment without individual consent because:

• applicable work rules contained provisions concerning external work;
• collective agreements contained secondment provisions;
• the external-work agreement contained detailed provisions;
• the secondment period and employee status were addressed;
• treatment during secondment was regulated;
• there was a business need for the secondment;
• employee selection was reasonable;
• working duties and location were not materially changed; and
• the employees did not suffer significant disadvantage.

The Court also held that merely because secondment became prolonged, it did not automatically become equivalent to a transfer of employment.

Principle:
A well-designed secondment system supported by work rules/collective agreements and reasonable business necessity can permit secondment without obtaining fresh individual consent for every employee.

Case 3 — Japan Stainless / Nissho Packaging Case

Niigata District Court, Takada Branch, 31 October 1986

Employees were ordered to secondment to affiliated companies and challenged the orders.

The court recognized that work rules could provide a sufficient basis for secondment without individual consent.

However, the court also examined the personal circumstances of the affected employees.

One employee had significant responsibilities concerning care of elderly parents. A relocation-based secondment was found particularly problematic because it conflicted with the employer's own personnel-selection policy concerning family circumstances.

The court consequently regarded the order as an abuse of personnel authority.

Principle:
Even where work rules permit shukko, the employer must consider individual circumstances and the proportionality of the particular assignment.

Case 4 — New Japan Steel / Nippon Steel Transportation Case at the lower-court stage

Fukuoka District Court, Kokura Branch, 26 March 1996

This litigation concerned secondment connected with outsourcing and restructuring of an internal transportation department.

The court examined the fact that:

• the employee remained employed by the original company;
• the secondment had a defined period;
• employment conditions were protected through the external-work agreement;
• return to the original company was contemplated; and
• the arrangement was formally zaiseki shukko rather than transfer of employment.

The court nevertheless recognized that the secondment was expected to become long-term, which meant that this factor could not simply be ignored when examining its legal basis.

The later Supreme Court judgment ultimately upheld the secondment order.

Principle:
A long secondment remains potentially zaiseki shukko, but expected duration and the practical reality of the arrangement matter when determining whether the employer has sufficient authority.

Case 5 — Return-from-secondment case

Supreme Court, 27 May 1983

This case concerned an employee who had already been seconded and was subsequently ordered to return to the original employer.

The Supreme Court held, in substance, that where the employee remained an employee of the original company, the original employer could generally order the employee's return without obtaining separate consent, absent special circumstances.

The reasoning was that the original employment relationship had never disappeared. Secondment merely temporarily placed the employee under the receiving company's direction.

The court distinguished the situation from a transfer in which the original employment relationship is terminated.

Principle:
Where a genuine zaiseki shukko continues to preserve the original employment relationship, return to the original employer is generally part of that continuing relationship.

Case 6 — Sanwa Kizai Case

Tokyo District Court, 31 January 1992

This case involved a restructuring in which a business division was separated into a new company. Employees were ordered to transfer to the new company and some challenged the transfer.

The court stressed the distinction between:

• an internal personnel transfer; and
• a transfer between two legally independent companies.

Where the two companies are genuinely independent legal entities, the transfer cannot simply be treated as an ordinary internal personnel assignment merely because the companies have strong capital or personnel connections.

The court therefore treated the transfer as requiring a different legal foundation from an ordinary internal transfer.

Principle:
Corporate-group relationships do not by themselves eliminate the legal distinction between secondment and transfer of employment.

6. Shukko vs. ten-seki

The distinction is important because Japanese authorities recognize that ten-seki generally requires individual consent, whereas a properly structured zaiseki shukko may be ordered under an existing contractual/work-rule framework.

7. Salary during secondment

Salary arrangements should be expressly addressed.

Possible structures include:

Model A — Original employer pays salary

The original company continues payroll and the receiving company reimburses the cost.

Model B — Receiving company pays

The receiving company pays some or all remuneration under the secondment agreement.

Model C — Split arrangement

The original employer continues paying base salary while the receiving company pays certain allowances or incentives.

The agreement should specify:

• basic salary;
• overtime;
• bonuses;
• allowances;
• housing;
• travel expenses;
• tax treatment;
• social insurance;
• retirement contributions;
• salary review;
• performance-related compensation.

Ambiguity is particularly dangerous where the receiving company's compensation system is less favourable.

8. Working hours and overtime

The parties should clearly establish who is responsible for:

• recording working hours;
• approving overtime;
• managing rest periods;
• holiday work;
• annual paid leave;
• compliance with the 36 Agreement;
• night work;
• overtime payments.

The receiving company ordinarily controls the employee's actual day-to-day work, so it should have an effective system for recording hours and communicating them to the original employer.

A secondment agreement should never be drafted on the assumption that transferring an employee to another company removes statutory working-time protections.

9. Disciplinary authority

This is one of the most frequently overlooked issues.

The parties should determine:

Who can:

• issue warnings;
• investigate misconduct;
• suspend the employee;
• impose disciplinary sanctions;
• terminate employment;
• recommend termination;
• control access to company facilities?

The receiving company normally has operational authority, but the original employer generally retains significant employment-related authority because the employee remains its employee.

The agreement should therefore avoid contradictory disciplinary provisions.

10. Harassment and workplace safety

Both companies should have procedures for:

• harassment complaints;
• power harassment;
• sexual harassment;
• discrimination;
• occupational accidents;
• mental-health concerns;
• safety violations;
• whistleblowing.

An employee seconded to another company should not be placed in a legal "gap" where neither company accepts responsibility.

The secondment agreement should specify:

who receives the complaint, who investigates, who preserves evidence, who communicates with the employee, and who ultimately takes employment action.

11. Duration and extension

A secondment should preferably specify:

• commencement date;
• initial period;
• extension mechanism;
• maximum/expected duration;
• conditions for extension;
• return procedure.

The Nippon Steel case demonstrates that a long duration does not automatically transform zaiseki shukko into ten-seki. The Supreme Court accepted continued secondment even after multiple extensions because the underlying employment relationship with the original company remained intact and the relevant employment framework supported the arrangement.

Nevertheless, indefinite or repeatedly extended secondment can increase legal risk, especially where:

• the original employer becomes merely nominal;
• the employee's conditions deteriorate;
• the receiving company exercises virtually all employment authority;
• return becomes unrealistic; or
• the arrangement effectively resembles permanent transfer.

12. When can a shukko order become an abuse of rights?

The following circumstances can create substantial risk:

1. No contractual/work-rule basis

The employer has no sufficiently clear authority to second employees.

2. No genuine business necessity

The secondment appears arbitrary or personal.

3. Punitive purpose

The employee is sent to an undesirable affiliate as punishment without proper disciplinary procedure.

4. Discriminatory selection

The employee is selected because of union activities, whistleblowing, complaints, protected activities or other improper reasons.

5. Excessive family hardship

The secondment creates severe and foreseeable personal consequences without adequate justification.

6. Major deterioration of conditions

Salary, benefits, career prospects or other fundamental conditions are significantly worsened.

7. Unreasonable location

A distant transfer imposes extraordinary commuting or relocation burdens.

8. No meaningful return

The "temporary" secondment is effectively permanent.

9. Inconsistent employee selection

The employer cannot explain why the particular employee was selected.

10. Procedural unfairness

The employer ignores consultation requirements contained in its own rules or collective agreement.

Article 14 expressly directs attention to the necessity of the secondment, employee selection and other circumstances.

13. Corporate restructuring and M&A

Shukko is frequently used during:

• mergers;
• acquisitions;
• group reorganizations;
• business transfers;
• spin-offs;
• shared-service restructuring;
• outsourcing;
• establishment of subsidiaries.

However, an acquisition does not automatically give the acquiring group unlimited authority to move employees among different legal entities.

The parties should determine whether the proposed arrangement is:

(a) ordinary internal transfer,

(b) zaiseki shukko,

(c) ten-seki, or

(d) another employment arrangement.

Mischaracterizing a transfer as "secondment" can create substantial employment-law problems.

14. Recommended contents of a Japanese shukko agreement

A comprehensive secondment agreement should address at least:

1. Names of original and receiving employers.
2. Employee identification.
3. Legal nature of the secondment.
4. Commencement date.
5. Duration.
6. Extension procedure.
7. Duties.
8. Work location.
9. Working hours.
10. Overtime procedure.
11. 36 Agreement responsibility.
12. Salary payer.
13. Salary protection.
14. Bonus.
15. Allowances.
16. Housing.
17. Travel expenses.
18. Annual leave.
19. Social insurance.
20. Workers' compensation.
21. Performance evaluation.
22. Disciplinary authority.
23. Harassment procedures.
24. Health and safety responsibilities.
25. Confidentiality.
26. Intellectual property.
27. Data protection.
28. Information-security obligations.
29. Business expenses.
30. Accident reporting.
31. Termination of secondment.
32. Return-to-original-employer procedure.
33. Early termination.
34. Dispute resolution.
35. Treatment of retirement benefits and seniority.

15. Practical compliance checklist

Before issuing a shukko order, the employer should ask:

Conclusion

Japanese law permits shukko (出向) as an important mechanism for corporate-group management, restructuring, employee development and outsourcing. But shukko is not simply a managerial label: it changes the entity exercising day-to-day control over the employee and therefore requires a sound legal framework.

The key principles emerging from the cases are:

1. A clear contractual, work-rule or collective-agreement basis is important.
2. Individual consent is not invariably necessary for zaiseki shukko.
3. Business necessity is a major consideration.
4. The selection of the particular employee must be reasonable.
5. The employee's working and personal circumstances must be considered.
6. Excessive disadvantage can make a secondment order an abuse of rights.
7. A long secondment does not automatically become ten-seki.
8. True transfer of employment to another independent company generally requires the employee's individual consent.
9. The secondment agreement should allocate salary, working-time, safety, disciplinary and benefits responsibilities precisely.
10. Article 14 of the Labour Contract Act provides the principal statutory safeguard against abusive secondment orders.

The Nippon Steel case (Supreme Court, 18 April 2003) is particularly important: where detailed secondment provisions existed, the business necessity and employee-selection criteria were reasonable, working conditions were protected, and significant disadvantage was absent, the Court accepted the employer's authority to order zaiseki shukko without individual consent.

The cases concerning Japan Stainless, return from secondment, and Sanwa Kizai, however, demonstrate that the analysis changes where employee-specific hardship, the absence of a sufficient contractual foundation, or the distinction between secondment and transfer of employment becomes significant.