Japan’s relationship with overtime is one of the most discussed — and most misunderstood — aspects of working life in the country. The concept of karoshi (death from overwork) entered the international lexicon for a reason. But the reality for foreign workers in Japan today is more nuanced, and there are both legal protections and practical strategies that can significantly shape your experience.

Japan’s Labor Standards Act sets clear rules on overtime:

Standard Working Hours

The legal standard is 8 hours per day and 40 hours per week. Work beyond this requires either overtime pay or a formal agreement.

The 36 Agreement (Sanjurokukyo)

For an employer to legally require overtime, they must first conclude a 36 Agreement (named after Article 36 of the Labor Standards Act) with employees or their representatives. This agreement sets limits on the maximum hours of overtime.

Post-2019 caps (mandatory):

  • 45 hours per month in regular periods
  • 100 hours per month in exceptional periods (with upper limit)
  • 720 hours per year maximum total overtime

Penalties for violation are now enforceable, though enforcement remains inconsistent.

Overtime Pay Rates

When overtime is worked:

  • Standard overtime: 125% of hourly rate
  • Late-night overtime (10pm–5am): 125% + 25% = 150%
  • Holiday overtime: 135%
  • Late-night holiday overtime: 160%

The “Fixed Overtime” Clause (Mitomegata Zōgyō)

One of the most important things to understand before signing a Japanese employment contract is the fixed overtime (Kotei Zangyo) clause.

Many Japanese job offers include a phrase like:

“Monthly salary of ¥300,000 includes fixed overtime of 40 hours.”

This means you are already paid for 40 hours of overtime per month within your salary. Only overtime beyond 40 hours triggers additional pay.

This is completely legal and extremely common. The key questions to ask:

  • How many hours of fixed overtime are included?
  • What is the base salary without the overtime component?
  • What happens if you regularly work fewer than the fixed overtime hours?

Always calculate the implied hourly rate before accepting an offer that includes fixed overtime.

The Cultural Reality of Overtime

Despite legal protections, overtime culture in Japan remains strong at many traditional companies. Several factors drive this:

Presenteeism: In many workplaces, being seen to work long hours is still associated with dedication and loyalty. Leaving at the official end time — even when all tasks are complete — can feel socially awkward.

Nemawashi and meetings: Decision-making in Japanese companies often involves lengthy consultation processes (nemawashi) and frequent meetings, consuming hours that other work cultures would spend on independent execution.

Understaffing at peak periods: Project deadlines, fiscal year ends, and tax seasons can create genuine crunch periods.

The Work Style Reform (Hataraki-Kata Kaikaku)

Since 2019, the Japanese government’s Work Style Reform legislation has imposed hard legal limits on overtime and introduced mandatory paid leave usage (at least 5 days per year). Many companies have actively reformed — some genuinely, others superficially.

Signs of genuine reform include:

  • Systematic tracking of actual working hours (not just clock-in/clock-out)
  • Management actively encouraging employees to leave on time
  • Metrics that evaluate output rather than hours

How Foreigners Experience Overtime

Foreign workers in Japan often report a mixed experience:

  • At foreign-owned companies: Overtime tends to be lower, and finishing on time is more normalized.
  • At Japanese companies with international divisions: Variable — often the international division operates somewhat differently from the Japanese-facing teams.
  • At smaller Japanese firms: Overtime norms vary enormously and are hard to gauge from outside.
  • At IT companies and startups: Often more output-focused and less tied to hours.

Setting Your Own Limits

Foreigners often find it easier than Japanese colleagues to establish personal limits, because cultural expectations on them are different (or simply lower). Practical approaches:

  1. Set the precedent early: Leave on time occasionally in your first weeks. It signals your baseline without creating conflict.
  2. Be explicit about priorities: If you’re busy, communicate clearly — in Japanese or English — what you can and can’t finish today.
  3. Use your paid leave: You are legally entitled to it. Use at least 5 days per year (required by law).
  4. Document your hours: Keep your own record of actual hours worked.
  5. Read your contract: Know whether you have fixed overtime and what your legal baseline is.

Warning Signs to Avoid

When job hunting, watch out for:

  • No 36 Agreement mentioned (legally required for overtime)
  • Fixed overtime covering 80+ hours per month
  • Reviews on sites like Glassdoor Japan or Kaisha no Hyoban showing chronic overwork
  • Job ads that heavily emphasize “commitment” and “dedication” with vague salary information