Stress Check Group Analysis in Japan — How to Read Results and Drive Workplace Improvement
Introduction
Every company with 50 or more employees in Japan is required to conduct an annual stress check (sutoresu chekku, ストレスチェック) under the Industrial Safety and Health Act (労働安全衛生法 Article 66-10). But the legal obligation doesn't stop at collecting individual results.
Group analysis (集団分析, shūdan bunseki) — aggregating stress check responses by department, team, or job type — is where the data becomes most valuable for HR and management. Under Article 52-14 of the Industrial Safety and Health Regulations, employers are expected to use group analysis results to improve the workplace environment.
This guide explains how group analysis works, how to read the results, and how to translate the data into concrete action.
1. What Is Stress Check Group Analysis?
Group analysis aggregates individual stress check responses across a defined group (e.g., a department or team) and produces a collective picture of workplace stress levels. Unlike individual results, group analysis data is shared with the employer — because it reflects the work environment rather than any individual's personal health status.
What it measures
The standard questionnaire (職業性ストレス簡易調査票, 57-item version) assesses three dimensions:
| Dimension | What it captures | Example questions |
|---|---|---|
| Job stressors | Workload, pace, control over work | "Do you have too much work?" / "Can you work at your own pace?" |
| Stress reactions | Physical and psychological symptoms | "Do you feel exhausted?" / "Do you feel anxious?" |
| Modifying factors (support) | Support from managers and colleagues | "Can you talk to your supervisor about problems?" |
Group analysis reports show average scores for each dimension, broken down by department or team, often with year-over-year comparison.
Privacy threshold
Group analysis results are only disclosed when the group contains 10 or more respondents. For groups with fewer than 10, results are withheld to protect individual privacy. This is an important constraint to plan around when designing your analysis structure.
2. How to Read Your Group Analysis Report
Step 1: Identify which departments to prioritize
Don't try to address every department at once. Focus on groups where multiple dimensions are simultaneously low, as these carry the highest burnout and turnover risk.
Priority signals to look for:
| Signal | Why it matters |
|---|---|
| Low "job control" score | Even heavy workloads are manageable if employees have some autonomy. Low control is the strongest predictor of burnout. |
| Low "supervisor support" score | Poor manager-employee relationships are the #1 driver of voluntary turnover in Japan. |
| "Stress reactions" score rising year-over-year | Absolute scores matter less than trends. A worsening trend signals emerging risk even if the score isn't yet in the danger zone. |
| Multiple low scores in the same department | The compound effect is non-linear — a department scoring low on three dimensions needs immediate attention. |
Step 2: Compare against company average and industry benchmarks
A score of 3.2 on "workload" means little without context. Compare each department's score against: - The company average for the same dimension - Prior-year scores for the same department - Industry benchmarks (available from the Ministry of Health, Labour and Welfare)
Departments performing significantly below the company average — even if scores aren't absolute lows — often indicate management or structural problems unique to that team.
Step 3: Don't over-interpret small groups
For groups just above the 10-person disclosure threshold (10–15 people), scores may vary significantly based on a few individuals. Treat small-group results as directional signals rather than definitive evidence, and supplement with qualitative data (interviews, pulse surveys).
3. From Data to Action: A 4-Step Process
Step 1: Prioritize 1–2 departments for focused intervention
Spreading improvement efforts too thin produces no measurable results. Choose the 1–2 departments with the most urgent combination of low scores, and commit resources to address them deeply before the next stress check cycle.
Step 2: Diagnose root causes through interviews
Low scores show where problems exist, not why. Before designing interventions, conduct structured interviews with:
- Department managers: "What makes this period especially demanding for your team?" / "Do you sense that team members hesitate to speak up?"
- Team members (anonymous survey): "What is the main reason your workload feels excessive?" (Multiple choice: understaffing / task concentration / unclear priorities / other)
Involving the occupational health nurse or industrial physician (sangyoi, 産業医) in these conversations increases the likelihood of honest responses.
Step 3: Design and implement targeted interventions
Match interventions to the specific dimension that scored low:
Low "job control" score:
| Intervention | Description |
|---|---|
| Workload audit | Identify tasks that can be eliminated, automated, or redistributed |
| Priority clarity | Managers explicitly declare "the top 3 priorities this month" — everything else can be deprioritized |
| Overtime visualization | Share monthly overtime data with the team to surface imbalances |
Low "supervisor support" score:
| Intervention | Description |
|---|---|
| Regular 1-on-1s | Implement weekly or bi-weekly 1-on-1 meetings between managers and direct reports |
| Manager coaching | Provide listening and feedback training for department managers |
| Alternative consultation channels | Publicize internal EAP, industrial physician appointments, and HR as accessible channels |
Low "colleague support" score:
| Intervention | Description |
|---|---|
| Structured team communication | Add a brief weekly check-in or informal session to team meetings |
| Skill visibility | Create a team skill map so members know who to ask for what |
| Cross-functional projects | Create opportunities for collaboration across team boundaries |
Step 4: Measure results at the next stress check
Evaluate whether interventions worked by comparing group analysis scores year-over-year. The questions to answer:
- Did the priority departments improve on the dimensions we targeted?
- Can we correlate score changes with the timing of our interventions?
- Did any new problem dimensions emerge?
Share the results of this evaluation with your industrial physician, occupational health team, and HR leadership to close the improvement loop.
4. Connecting Group Analysis to Other HR Data
Group analysis is most powerful when combined with other HR metrics:
| Data source | How it connects to group analysis |
|---|---|
| Pulse surveys | Monthly pulse data tracks whether mid-year interventions are working, without waiting for the next annual stress check |
| Turnover data | Departments with chronically low stress check scores that also show above-average turnover confirm the intervention priority |
| Overtime records | High overtime in a department with low "job control" scores confirms workload as the root cause |
| 1-on-1 records | Manager-level patterns visible in 1-on-1 notes can explain why "supervisor support" scores are low |
This multi-source approach gives HR managers a fuller picture and stronger evidence base for recommending organizational interventions.
5. Frequently Asked Questions
Q: Can we share group analysis results with department managers?
A: Yes — this is the intended use. Group analysis results (not individual results) should be shared with relevant managers so they can take action. Ensure managers understand that individual responses are anonymous and aggregated.
Q: What if a department has fewer than 10 employees?
A: Group analysis results cannot be disclosed for groups under 10. Options include: combining with an adjacent team for analysis purposes, using pulse surveys as a substitute, or relying on qualitative methods (interviews, observations).
Q: Are we legally required to act on group analysis results?
A: The obligation is defined as a "duty of effort" (努力義務), not a hard mandate. However, companies that demonstrably ignore group analysis findings may face administrative guidance. Health and Productivity Management (健康経営) certification also evaluates whether group analysis results are actively used.
Q: Who should review the group analysis results?
A: Minimally: HR, the industrial physician, and department managers for the relevant teams. For organization-wide patterns, executive leadership should also be briefed.
Summary
| Step | Key action | Success indicator |
|---|---|---|
| Read results | Identify priority departments (multiple low scores, worsening trends) | 1–2 focus departments selected |
| Diagnose | Interview managers and team members to find root causes | Root causes confirmed before interventions designed |
| Intervene | Match interventions to the specific low-scoring dimension | Actions assigned with owners and timelines |
| Measure | Compare year-over-year scores; share findings with key stakeholders | Quantified improvement visible in next cycle |
Group analysis is only valuable if it triggers action. The organizations that get the most from their stress check program are those that treat group analysis not as a compliance report, but as an annual diagnostic that shapes their workplace improvement agenda.
For more detail on post-analysis improvement steps, see Stress Check Group Analysis: Step-by-Step Implementation Guide.
COCKPITOS's stress check platform provides automated group analysis reports, department-level score comparisons, year-over-year trend visualization, and integration with pulse surveys for year-round monitoring. Contact us for a free consultation.