Japan Expansion on a Small Team? Your Stress Check Obligations Before and After the 2028 Mandate
Introduction
You've set up your Japan entity. You have 8, 15, maybe 30 employees — enough to be a real operation, not enough to hit the 50-employee threshold that triggers Japan's most intensive occupational health obligations.
Good news: you're not yet subject to the mandatory annual stress check (ストレスチェック制度). That obligation currently applies only to companies with 50 or more regularly employed workers.
Here's the thing: that changes in April 2028.
Legislation passed in 2025 extends the mandatory stress check to all employers in Japan, regardless of headcount. If you have even one employee in Japan after that date, you will be required to conduct an annual psychological wellbeing survey under the Industrial Safety and Health Act.
For foreign companies building their Japan presence now, this isn't a distant policy footnote — it's a compliance milestone that should be in your infrastructure planning.
This guide explains what applies now, what changes in 2028, and why setting up early (even before you're required to) is usually the smarter move.
1. The Current Situation: Headcount Thresholds
Japan's occupational health compliance system scales with employee headcount. Here's where a small or growing foreign company stands today:
| Headcount | Stress check required? | Industrial physician required? | Occupational Health Committee? |
|---|---|---|---|
| 1–9 | ❌ Not yet (mandatory from April 2028) | ❌ Not required | ❌ Not required |
| 10–49 | ❌ Not yet (mandatory from April 2028) | ❌ Not required | ❌ Not required |
| 50+ | ✅ Required now | ✅ Required now | ✅ Required now |
What IS required for all employers regardless of size, from employee 1: - Annual health checkups (定期健康診断) — physical health check, employer-funded - Social insurance enrollment (health insurance, pension, employment insurance, workers' comp) - Standard employment contract obligations under the Labor Standards Act
The stress check is the significant addition coming for everyone in 2028.
2. What the 2028 Mandate Means
2.1 Timeline
- 2025: Legislation passed extending stress check obligation to all employers
- April 2028: Mandatory implementation begins for companies under 50 employees
- After April 2028: All employers in Japan must conduct an annual stress check for all employees, regardless of headcount
If you're building a Japan operation now, the clock starts in under two years.
2.2 What the Stress Check Actually Is
The stress check is an annual psychological wellbeing survey — not a clinical diagnostic, and not a tool for management surveillance. Key features:
- What it measures: Three dimensions — job stressors (workload, autonomy, relationships), stress reactions (psychological and physical symptoms), and support resources (manager support, peer support, organizational support)
- Who implements it: Must be conducted by a qualified implementer — your industrial physician (if you have one), or a certified external provider
- Data ownership: Individual results belong to the employee, not the employer. HR does not see individual scores unless the employee explicitly consents. This is different from most corporate wellness surveys in other markets.
- What employers receive: Aggregate/group analysis data — how departments or the team as a whole are scoring on various stress dimensions
For a small company under 50 employees, there's no industrial physician requirement yet — but you will need to engage a qualified implementer (a physician, certified nurse, or accredited external service provider) to run the survey lawfully.
2.3 The Privacy Design — Why It Matters for Foreign HR
If you're coming from a US, UK, or European HR background, the privacy structure of the Japanese stress check is likely unfamiliar. In many markets, employee wellness data flows to HR as a matter of course. Japan's system is different by design.
The stress check was introduced with explicit privacy safeguards to prevent employers from using mental health data in employment decisions. When employees know their individual results won't be seen by their manager or HR (unless they choose to share), participation rates are significantly higher — and the data is more honest.
This also means you cannot use stress check results to: - Assess an individual employee's fitness for a role - Justify a disciplinary action - Make placement or promotion decisions based on stress scores
Individual data used in this way is a violation of the Act and creates serious legal exposure.
3. What Small Teams and Startups Should Do Now
3.1 Understand What You're Currently Missing (And What It Costs)
Many small foreign company Japan entities skip voluntary stress check implementation entirely, reasoning "we're not required to." This is technically correct but misses a few things:
Voluntary implementation before 2028 is recognized practice. The Ministry of Health, Labour and Welfare (MHLW) specifically encourages companies under 50 to implement voluntarily. Doing so signals to employees that the company takes occupational health seriously — relevant for talent attraction in Japan's competitive market.
Building the infrastructure early is cheaper than doing it under deadline pressure. Finding a certified implementer, establishing the questionnaire process, communicating with employees about data privacy — these take time. Companies that scramble at the 2028 deadline typically do so at higher cost and with more employee confusion.
3.2 Vendor Selection: Start Looking Now
For companies under 50 employees, the options for stress check implementation are:
Option A: Industrial physician as implementer You don't need an industrial physician yet (under 50), but you may choose to engage one voluntarily. A contracted physician can implement the stress check as part of their service. This is typically more expensive but provides integrated occupational health support.
Option B: External certified service provider Companies like COCKPITOS provide end-to-end stress check implementation at scale — digital questionnaire, individual result delivery, group analysis — without requiring your own industrial physician. This is the most practical option for most small Japan entities.
For foreign companies with multilingual workforces, language support is a critical selection criterion. The standard stress check questionnaire is in Japanese. If your Japan team includes non-Japanese speakers (common in foreign-affiliated companies), you need a provider that offers the questionnaire in multiple languages.
3.3 Policies to Put in Place Before 2028
Even before the legal obligation kicks in, consider establishing:
Stress check data handling policy: Document how individual results are kept confidential, who in the organization has access to what data, and how group analysis will be used.
Communication plan: When you launch the stress check (voluntarily or mandatorily), employees need to understand what it is, why it's being done, and — critically — that individual results are private. Poorly communicated implementations generate employee suspicion and low participation.
High-stress follow-up protocol: When the survey identifies high-stress employees (which it will), what's the process? Who do employees reach out to? For companies under 50 without an industrial physician, this typically means establishing a relationship with an external occupational health clinic or EAP provider.
4. The Growth Scenario: Approaching 50 Employees
If you're currently at 20–40 employees and growing, the 50-employee threshold will add multiple obligations simultaneously. Planning ahead prevents the common pattern of discovering these requirements only after crossing the line:
6 Months Before 50 Employees
- [ ] Begin identifying an industrial physician (contracted) — lead time can be 1–3 months
- [ ] Confirm whether any current staff hold the health management officer (衛生管理者) qualification — if not, begin training
- [ ] Review your existing stress check vendor arrangement (if voluntary implementation is in place) — some arrangements are designed for small workplaces and may need to be upgraded
3 Months Before 50 Employees
- [ ] Sign industrial physician contract
- [ ] Draft Occupational Health Committee formation plan
- [ ] Confirm who will represent employees on the committee
At 50 Employees
- [ ] File industrial physician and health management officer appointments with Labor Standards Inspection Office
- [ ] Hold first Occupational Health Committee meeting
- [ ] Begin formal stress check implementation (if not already running voluntarily)
- [ ] Scale group analysis from team-wide to department-level reporting
5. The Particular Challenge for Foreign Company Japan Teams
Small foreign company Japan entities face specific challenges the 2028 mandate highlights:
5.1 Multinational Workforces
Foreign-affiliated companies in Japan have higher proportions of non-Japanese employees than domestic companies. The standard stress check questionnaire is in Japanese — which means a Japanese-only implementation effectively excludes or disadvantages a significant portion of your workforce.
When evaluating vendors, multilingual questionnaire support isn't optional for most foreign company Japan entities. COCKPITOS supports 10 languages including English, Vietnamese, Chinese, Korean, Filipino, Indonesian, Thai, and Portuguese.
5.2 Global HQ Expectations vs Japanese Legal Requirements
If your Japan entity is part of a larger multinational, your global HR function likely has its own employee wellbeing programs — annual engagement surveys, EAP programs, mental health days. These do not substitute for the mandatory Japanese stress check.
Japan's stress check is a legal obligation with specific requirements: qualified implementer, defined questionnaire structure, mandatory individual privacy, government-format reporting. A global engagement survey that doesn't meet these requirements won't satisfy the legal obligation.
Conversely, data from the Japanese stress check (individual results) cannot be fed into global people analytics platforms without individual employee consent — the privacy requirements are stricter than in most other markets.
5.3 Reporting Lines and Organizational Complexity
For companies where the Japan entity is relatively small but part of a global matrix, questions arise about organizational structure for the Occupational Health Committee (when you reach 50+ employees). The committee requires employee representatives — which can be complex in flat or matrix organizations.
Building a plan for committee structure before you reach 50 is much easier than retrofitting governance into a grown organization.
6. 2028 Preparation Timeline
If you're a company currently under 50 employees in Japan, here's a practical preparation schedule:
| Timeframe | Actions |
|---|---|
| Now (2026–2027) | Review current occupational health practices; identify stress check vendor; establish data handling policy; consider voluntary implementation for high-engagement signal |
| Mid-2027 | Confirm vendor contract for 2028 implementation; finalize employee communication plan; multilingual materials prepared |
| Q1 2028 | Employee communication rollout; finalize implementation logistics |
| April 2028 | First mandatory implementation cycle begins |
| Q3–Q4 2028 | First group analysis available; document and review results |
How COCKPITOS Supports Small Teams in Japan
COCKPITOS is designed to scale with your Japan entity — from voluntary small-team implementation through mandatory compliance:
- Multilingual stress check: 10 languages, no additional setup for non-Japanese speakers
- No industrial physician required for implementation: certified external provider handles the qualified implementer requirement
- Employee result portal: secure, private individual result access
- Group analysis: team-level reporting useful even for small organizations
- Growth path: same platform scales to 50+ employee requirements including industrial physician coordination and department-level analysis
Contact us to plan your 2028 compliance roadmap →
Summary
| Now (under 50 employees) | From April 2028 | |
|---|---|---|
| Annual health checkup | ✅ Required | ✅ Required |
| Stress check | Voluntary (recommended) | ✅ Required for all |
| Industrial physician | Not required | Still not required under 50 (but useful) |
| Occupational Health Committee | Not required | Still not required under 50 |
The 2028 mandate removes the headcount threshold for stress checks. If you're building a Japan entity now, you have a two-year window to build the infrastructure thoughtfully rather than under deadline pressure. Companies that implement voluntarily in 2026 or 2027 arrive at 2028 with working systems, experienced employees, and genuine occupational health data — rather than a compliance checkbox rushed through in Q1 2028.
Related Articles
- The 50-Employee Milestone in Japan: New HR Compliance Obligations You Must Meet
- Japan Stress Check Law — A Complete Guide for Foreign Companies
- Japan's Stress Check Mandate Expands to All Employers: What HR Needs to Know for April 2028
- Occupational Health in Japan: Mandatory Health Checkups, Stress Checks, and Industrial Physician Requirements
- Japan Employment Law for Foreign Companies: What HR Needs to Know Before Hiring Your First Employee