The hidden epidemic of voluntary overwork in Japan continues to challenge HR professionals and company leadership alike. In Japan, excessive work often isn’t enforced but socially reinforced. This unspoken culture, where staying late is a loyalty badge and leaving on time draws disapproval, continues despite legal reforms. Overwork isn’t just long hours; it’s a cultural pattern deeply embedded in the day-to-day rhythms of companies.
Despite the 2018 Work Style Reform Act, capping overtime at 100 hours monthly, the law allows loopholes. In 2021, the Ministry of Health, Labor & Welfare found that 44.5% of companies still reported illegal overtime practices. Hidden overtime (“Moguri”) and unlogged work remain prevalent.
Why It Matters: Legal, Health, and Talent Risks
- Health Consequences: Excessive overtime is linked to strokes, heart disease, depression, injuries, and suicidal behavior. Health guidance laws now mandate HR engagement for long-hour workers.
- Talent Drain: New hires quickly burn out or leave, while long-time staff struggle to balance life and work. Hidden fatigue hurts productivity and harms retention.
- Legal Exposure: Persistent unpaid or illegal overtime can trigger labor penalties and karōshi-related compensation claims.

Root Causes: The Social Fabric Behind Voluntary Overwork
- “Wa” and Harmony: Employees stay late to maintain team cohesion and avoid embarrassment.
- Managerial Modeling: When leaders stay late, that behavior becomes the norm.
- Evaluation Based on Hours, Not Outcomes: Time spent at the desk is still valued more than actual productivity.
- Work as Identity: Work defines one’s worth. Taking time off feels disloyal or unproductive.
Successful Strategies: What Japanese Companies Can Do

While legal reforms set the framework, real change happens through daily practices inside the workplace. The following strategies are grounded in cultural understanding and proven experience, offering HR teams a practical path to reshape expectations and support healthier work patterns.
Leadership by Example
Leaders should consistently leave on time and model healthy behavior, especially during high-pressure periods like the end of the month. This small but visible act can normalize work-life balance across teams. Additionally, symbolic gestures such as periodic announcements or gentle reminders can help signal that the workday should wrap up.
Structural Supports & Smart Controls
Installing automatic PC shutdowns after working hours can be an effective deterrent against lingering at the office. Where flexibility is needed, allow opt-outs with transparent approval. Also, using third-party cues like security staff or front desk announcements can create neutral and culturally resonant end-of-day signals.
Focus on Outcomes, Not Presence
Refocus performance management systems to reward achievements rather than time spent in the office. Recognizing and celebrating projects completed efficiently and on schedule helps shift internal perceptions away from equating long hours with value.
Promote Life-Balance Culture
Spotlighting and rewarding personal milestones or community contributions—like volunteer work or skill development—can validate diverse definitions of success. Supporting this with cultural references, such as characters from Watashi, Teiji de Kaerimasu, can reinforce positive behavioral shifts through familiar storytelling.
Continuous Monitoring & Dialogue
Regular anonymous surveys and facilitated focus groups can help HR detect invisible pressures and behavioral patterns. Monthly workspace reflections involving HR can surface concerns early. Tracking department-wide overtime trends also allows for proactive intervention when workloads spike.
Leverage Policy and Resources
Partner with national initiatives like MHLW hotlines and karōshi prevention campaigns to embed external accountability into your internal processes. Ensure that high-risk staff receive mandatory health guidance under labor safety law revisions, and maintain transparent, compliant work-hour logs to build trust.
Looking Ahead: Building a Sustainable Work Culture
Solving the problem of voluntary overwork in Japan is not about quick fixes—it’s about long-term cultural change. HR departments have the unique opportunity to shift workplace norms through consistent leadership, structural nudges, and open dialogue. Small, well-chosen interventions today can create an environment where employees are empowered to value both their contribution and their well-being. The goal isn’t just compliance—it’s a healthier, more sustainable, and ultimately more productive workforce.
Here are some practical first steps HR teams can use to begin shifting workplace norms and safeguarding employee wellbeing:

- Run a Time Culture Audit: Interview or survey employees anonymously to uncover why people stay late, what’s unspoken, and where pressure points exist.
- Identify Cultural Gatekeepers: Find the informal leaders who influence behavior and invite them to shape new norms—such as leaving on time.
- Trial “No Overtime Days”: Pilot one day per week where everyone is expected to leave on time, no exceptions. Monitor reactions and barriers.
- Start a “Leave Proud” Campaign: Use internal messaging to normalize and even celebrate employees who leave at 定時 (on time).
- Create a Safe Reporting Channel: Allow staff to share concerns about overwork pressures or “Moguri” overtime anonymously, and take action visibly.
- Host a Roundtable with New Hires: Ask newer employees what surprised them about work hours and why. Use these insights to improve onboarding and culture.
- Remove Subtle Overwork Cues: Turn off hallway lights after 6pm, or schedule building music to play as a soft reminder that the day is ending.
- Publish Overtime Trends Transparently: Share department-level overtime trends monthly so leaders are accountable, and teams see progress.
Final Thoughts
Japan’s voluntary overwork culture is deeply rooted in tradition, team loyalty, and unspoken expectations. But cultural patterns are not unchangeable—they evolve when companies choose to lead differently. HR professionals are uniquely positioned to initiate that shift by making room for reflection, rewarding smarter work habits, and leading with empathy. Even in organizations where change feels slow or difficult, the effort to prioritize human wellbeing always pays off in the long run.
