Workplace Mental Health Compliance in Japan: What Every Employer Needs to Know (And What Most Miss)
Introduction
Japan has experienced high-profile cases of karōshi (過労死, death by overwork) and karōjisatsu (過労自殺, overwork-related suicide) that have driven successive waves of legislative response. The result is an employer compliance environment around mental health that is more detailed, more enforceable, and more legally risky to ignore than in almost any other market.
For foreign companies operating in Japan — particularly those coming from markets where mental health is treated primarily as an individual or voluntary wellness matter — this compliance landscape is often a significant discovery.
This guide covers the full range of Japanese employer obligations related to workplace mental health: the mandatory systems, the guidelines that function as de facto standards, the harassment prevention laws, and the work accommodation duties that apply when employees develop mental health conditions.
1. The Legislative Architecture
Japan's workplace mental health compliance framework sits across several laws and ministerial guidelines:
| Instrument | What it covers |
|---|---|
| Industrial Safety and Health Act (労働安全衛生法) | Annual stress check, industrial physician, Occupational Health Committee, health checkup obligations |
| MHLW Mental Health Promotion Guidelines (労働者の心の健康の保持増進のための指針) | Four-care model framework, employer expectations for mental health programs |
| Act on Comprehensive Promotion of Labor Policies (労働施策総合推進法, "Power Harassment Prevention Law") | Mandatory measures to prevent power harassment, including mental health impacts |
| Act on Securing Equal Opportunity and Treatment between Men and Women (均等法) | Sexual harassment prevention measures |
| Labor Standards Act (労働基準法) | Work accommodation duties, leave entitlements, overtime regulation |
| Workers' Compensation Insurance Act (労災保険法) | Coverage for work-related mental health conditions, including stress-induced illness and suicide |
Understanding these as a system — not as isolated requirements — is essential. They interact and reinforce each other in ways that create overlapping employer duties.
2. The Stress Check: The Central Mandatory Survey
The annual stress check (ストレスチェック制度) under Article 66-10 of the Industrial Safety and Health Act is the cornerstone of Japan's mandatory workplace mental health infrastructure.
Currently mandatory for: Companies with 50+ employees
Mandatory for all companies from: April 2028
The stress check is a standardized psychological wellbeing survey — 57 or 80 items — that assesses: - Job stressors: workload, work pace, role control, physical environment, interpersonal dynamics - Stress reactions: psychological symptoms, physical symptoms, behavioral indicators - Support resources: manager support, colleague support, organizational fairness
Critical design feature: Individual results are owned by the employee, not the employer. The employer sees only group/aggregate data. This prevents the data from being used in performance or employment decisions.
What employers receive: Department-level stress profiles through "group analysis" (集団分析). This is the basis for workplace improvement initiatives, which the Occupational Health Committee must formally deliberate and act on.
For a full breakdown of the stress check system: Occupational Health in Japan: Mandatory Requirements
3. The Mental Health Promotion Guidelines: The Four-Care Model
In 2006, the Ministry of Health, Labour and Welfare issued Guidelines for Maintaining and Improving Workers' Mental Health (commonly called the Mental Health Guidelines). These are not legally binding law, but they establish the framework that courts, labor inspectors, and tribunals use to evaluate whether an employer took reasonable mental health precautions.
Following the Guidelines is effectively the standard of care in Japan.
The Four-Care Framework
The Guidelines define four levels of care that should operate simultaneously:
| Care Level | Who delivers it | What it involves |
|---|---|---|
| Self-care | Employees | Stress awareness training; teaching employees to recognize and manage their own stress; promoting help-seeking behavior |
| Line care | Managers (directly) | Training managers to recognize early signs of mental health concerns in team members; appropriate check-in behavior; knowing when and how to refer to professional support |
| Industrial health staff care | Industrial physician, occupational health nurses, clinical psychologists | Professional consultation, crisis intervention, coordination with treatment |
| External resource care | EAP, external counseling, community health resources | Confidential external support channels outside the company structure |
For foreign companies, line care is often the weakest link. Japanese management training traditionally emphasizes technical and performance skills — not mental health first aid or psychological check-in practices. Structured manager training on recognizing and responding to team member mental health concerns is an employer obligation under the Guidelines and a genuine cultural gap in many organizations.
What This Means for HR
The Guidelines create employer expectations around: - Mental health education programs for all employees - Manager training on recognizing and responding to team member mental health concerns - Clear referral pathways from manager to professional support - Return-to-work protocols for employees returning after mental health leave
None of these are checked off with a single annual survey. The Guidelines envision a year-round mental health management culture.
4. Harassment Prevention: Mandatory Legal Obligations
4.1 Power Harassment (パワーハラスメント)
The "Power Harassment Prevention Law" (改正労働施策総合推進法), which took full effect for all companies in 2022, imposes mandatory obligations on employers to:
- Clearly define what constitutes power harassment in company policy
- Establish and publicize a consultation channel for harassment complaints
- Investigate complaints promptly, fairly, and confidentially
- Protect complainants from retaliation
- Take corrective action when harassment is confirmed
Power harassment is defined across six types, including: - Physical assault or threats - Mental attacks: abusive language, personal degradation - Isolation: excluding someone from team activities - Overwork demands: unreasonable workload, impossible deadlines - Skill undermining: assigning tasks far below capability - Invasion of privacy
Power harassment has a direct mental health dimension. A significant proportion of work-related mental health conditions claimed under workers' compensation are attributed to harassment dynamics. Employers who cannot demonstrate functioning harassment prevention and investigation systems face both labor law liability and workers' comp exposure.
4.2 Sexual Harassment (セクシャルハラスメント)
Under the Act on Securing Equal Opportunity (均等法), employers have long-standing mandatory obligations to prevent and respond to sexual harassment. These overlap with the mental health framework: victims of workplace sexual harassment frequently develop anxiety disorders, depression, and PTSD that, if work-caused, are compensable under Japan's workers' compensation system.
4.3 Maternity Harassment and Caregiving Harassment (マタニティハラスメント / ケアハラスメント)
Amendments to equality and childcare laws added employer obligations to prevent harassment related to pregnancy, childcare leave, or caregiving responsibilities.
5. Working Hours: The Mental Health Risk That Creates Legal Liability
5.1 The 80-Hour Rule and Brain and Heart Disease Compensability
Japan's workers' compensation system includes specific recognition of karōshi (死亡) and work-related mental health conditions caused by overwork. The legal standard for compensability:
- Overtime hours exceeding 80 hours/month in the 2 months before onset create a compensable basis for brain/heart disease (cerebral and cardiovascular events)
- Overtime hours exceeding 100 hours/month in the month before onset create a stronger presumption
For work-related mental health conditions (depression, anxiety, adjustment disorder): - A different causation analysis applies, looking at specific work-related stressors and their intensity - The "Psychosocial Factors Recognition Criteria" (精神障害の労災認定基準) lists events and conditions that, if occurring in the period before mental health symptom onset, create a compensable basis — including being the target of harassment, experiencing serious business incidents, or being placed under extreme work pressure
Implication for employers: Excessive overtime isn't just an HR or labor standards problem — it's a direct mental health liability vector.
5.2 The 36 Agreement and Overtime Caps
The 36 Agreement (三六協定) must be filed for any overtime beyond statutory maximums. Since 2019, the law imposes hard caps: - General cap: 45 hours/month, 360 hours/year - Special circumstances (with special provisions in the agreement): 100 hours/month (single month), 80 hours/month (2–6 month average)
These caps are the direct result of karōshi prevention policy. Exceeding them creates both Labor Standards Act liability and workers' compensation exposure.
6. Work Accommodation Duties: When Mental Health Conditions Arise
6.1 The Employer's Obligation to Accommodate
When an employee develops a mental health condition — diagnosed or assessed by a physician — the employer has work accommodation obligations under Japanese law. These derive from: - Industrial Safety and Health Act (industrial physician opinion → employer must act) - Labor contract law (employer's duty of care, 安全配慮義務) - Court precedent establishing employer liability for failing to prevent foreseeable mental health harm
Typical accommodations the industrial physician may recommend: - Reduction in working hours - Elimination of overtime - Transfer from a high-stress work environment or supervisor - Temporary reassignment to less demanding duties - Part-time return following mental health leave
The employer is not required to implement all physician recommendations, but must document the rationale for any accommodation it declines to make. Courts examine this documentation in work-related illness cases.
6.2 Mental Health Leave (休職)
Japan's labor law does not mandate a specific mental health leave entitlement, but most Work Rules (just業規則) contain leave-of-absence provisions. For employees on mental health leave:
- The employer typically cannot dismiss the employee during the leave period (under most Work Rules provisions)
- The employer has duties around return-to-work management — including a graduated return program and coordination with the industrial physician
Poor return-to-work management is a significant source of discrimination claims and workers' compensation disputes.
6.3 Workers' Compensation for Mental Health Conditions
Japan's workers' compensation system (労災保険) covers work-related mental health conditions. If an employee is diagnosed with depression or another mental health condition attributable to working conditions, they may file a workers' compensation claim. The employer does not control this process.
Employers face secondary liability when: - Workers' compensation is approved for a mental health condition - The employer failed to implement required stress check, harassment prevention, or working hours management - Courts may award additional damages for employer negligence beyond the workers' compensation amounts
7. The Annual Compliance Cycle: What Good Practice Looks Like
For a company with 50+ employees, a functioning annual mental health compliance cycle includes:
| Quarter | Activity |
|---|---|
| Q1 | Stress check implementation: survey delivery to all employees |
| Q1–Q2 | Individual results delivered privately to employees; high-stress follow-up consultations with industrial physician (as requested) |
| Q2 | Group analysis data available; Occupational Health Committee reviews results |
| Q2–Q3 | Workplace improvement actions documented and implemented based on group analysis |
| Q3 | Annual health checkup cycle (can overlap with stress check planning) |
| Q4 | Manager mental health training (annual or periodic); line care program review |
| Ongoing | Monthly Occupational Health Committee meetings; harassment consultation channel maintenance; working hours monitoring; return-to-work case management |
8. What Foreign Companies Consistently Miss
| Missed obligation | Why it's missed |
|---|---|
| Stress check | No equivalent in most home markets; absent from standard Japan HR compliance overviews |
| Four-care framework implementation | Understood as "nice to have"; actually functions as standard of care in tribunal decisions |
| Manager line care training | Global manager training programs don't include Japan-specific mental health check-in obligations |
| Harassment consultation channel formalization | Informal "open door" policies don't satisfy the legal requirement for a named consultation channel with documented process |
| Working hours and workers' comp connection | Overtime tracked for labor standards; workers' comp mental health exposure not modeled |
| Return-to-work protocol | Case management handled ad hoc; no documented graduated return process creates liability |
9. How COCKPITOS Supports Mental Health Compliance
COCKPITOS provides the stress check infrastructure and employee engagement tools that form the operational core of Japan's mandatory mental health compliance:
- Annual stress check: certified implementation, multilingual (10 languages), individual privacy protection, group analysis for committee review
- 1on1 management tools: supporting manager line care through structured check-ins and relationship data
- Pulse survey: continuous team-level wellbeing monitoring between annual stress checks
- Industrial physician coordination: high-stress follow-up appointment management
- External counseling integration: referral pathways from the stress check to professional support
Contact us to discuss your Japan mental health compliance infrastructure →
Summary
Japan's workplace mental health compliance framework is not a single law — it's a system of mandatory surveys, professional health infrastructure, harassment prevention obligations, working hours controls, and work accommodation duties. Foreign companies that treat mental health compliance as "just a wellness initiative" miss the legal architecture that surrounds it.
The mandatory stress check is the most visible element — and from April 2028, it applies to all employers regardless of size. But it sits within a broader system that includes:
- Annual stress check — mandatory for 50+ now, all companies from 2028
- Four-care mental health framework — Guidelines-based standard of care
- Harassment prevention — mandatory reporting, investigation, and correction obligations
- Working hours controls — karōshi prevention as workers' compensation exposure
- Work accommodation duties — when conditions arise, documented response required
Getting the infrastructure right is both a legal compliance matter and a genuine investment in the stability and wellbeing of your Japan team.
Related Articles
- The 50-Employee Milestone in Japan: New HR Compliance Obligations You Must Meet
- Occupational Health in Japan: Mandatory Health Checkups, Stress Checks, and Industrial Physician Requirements
- Japan Expansion on a Small Team? Your Stress Check Obligations Before and After the 2028 Mandate
- When Employees Refuse Stress Check Interviews in Japan
- Japan Employment Law for Foreign Companies