Overtime in Japan: Contractual Hours, Statutory Limits, and Premium Pay
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Category: Work Styles
Authors: Shusaku Yosa
Working past your scheduled finishing time does not always mean statutory overtime. A company's contractual working hours and the legal limits are different reference points. To check a payslip, separate the hours worked, their classification, and the wages paid for each part.
This guide starts with an ordinary working-time arrangement in Japan, then checks daily hours, weekly totals, and premium rates.
Contractual overtime and statutory overtime
The general statutory limits are eight working hours a day and 40 a week, excluding breaks. Contractual working hours are the hours set by your employment terms and workplace rules.
Classification | Meaning | What to check |
|---|---|---|
Extra work within statutory limits | Work beyond contractual hours that remains within the legal limits | Ordinary wages for the work and any additional contractual rate |
Statutory overtime | Work exceeding the general daily or weekly statutory limit | Ordinary wages plus the required overtime premium |
No statutory overtime premium does not mean unpaid work. Check how ordinary wages for those hours are covered, including the scope of any monthly salary. More generous contractual rates also matter. For contractual hours and monthly averages, see the prescribed working hours guide.
Daily example: a seven-hour day extended by two hours
Suppose scheduled work is 9 a.m. to 5 p.m. with a one-hour break. You instead finish at 7 p.m., and total breaks remain one hour. Actual work is nine hours. Under the ordinary eight-hour/40-hour arrangement, assuming the weekly limit does not create additional overtime:
Period | Cumulative work | Classification |
|---|---|---|
9 a.m.–5 p.m., including a one-hour break | Seven hours | Contractual hours |
5–6 p.m. | Eight hours | One extra hour within the daily statutory limit |
6–7 p.m. | Nine hours | One hour of statutory overtime |
If the ordinary hourly wage used for this calculation is ¥1,600, monthly statutory overtime is no more than 60 hours, there is no night work, and there is no higher contractual rate, pay for the two extra hours is ¥1,600 × 1 + ¥1,600 × 1.25 × 1 = ¥3,600. The premium component alone is ¥400.
Neither applying 1.25 to both hours nor treating ¥400 as the entire payment is correct under these assumptions. See hourly pay and working-time calculations for converting minutes.
A day below eight hours can still contribute to weekly overtime
For example, seven hours on each day from Monday through Saturday totals 42 hours. Under the ordinary 40-hour week, with no statutory-holiday work or special working-time arrangement, two hours exceed the weekly limit even though no day exceeds eight hours.
Do not count the same hours twice when reconciling daily and weekly overtime. Confirm the start of the employer's working week, daily actual hours, and holiday classifications. A Saturday or Sunday is not automatically the statutory holiday; use the statutory holiday guide for that separate question.
Monthly totals and night work change the rate
The ordinary statutory overtime premium is at least 25%. The portion exceeding 60 statutory overtime hours in a month attracts at least 50%, including at small and medium-sized employers. The higher rate does not retrospectively apply to every overtime hour that month.
Night work from 10 p.m. to 5 a.m. attracts at least 25% extra. Combined with ordinary statutory overtime, the total premium is at least 50%; combined with overtime beyond the monthly 60-hour threshold, it is at least 75%. Statutory-holiday work has a minimum 35% premium. It does not also attract the statutory overtime premium, but a night premium can apply.
For monthly salaries, check which allowances enter the premium-pay base and which wages can be excluded. With fixed overtime pay, identify the covered hours and amount, and whether any shortfall against the legal calculation has been paid.
Paying a premium does not remove working-time restrictions
Statutory overtime generally requires a filed Article 36 agreement, with separate limits on permitted hours. The general limits are 45 hours a month and 360 a year. Special clauses and occupation-specific rules need their own assessment. Whether hours may be required and how actual work must be paid are separate questions; absence of an Article 36 agreement does not eliminate premium pay for overtime actually worked.
The examples above do not cover variable working-time arrangements, flexitime, the 44-hour weekly exception for certain small establishments, or other exclusions. Identify the applicable system before applying the examples.
A practical payslip question
- Find contractual hours, the working-time system, and the starting day of the working week.
- Record actual starts, finishes, breaks, and work instructions.
- Separate daily and weekly statutory overtime, night work, and statutory-holiday work.
- Compare the hours, hourly base, rates, and fixed overtime components with the payslip.
For example: “My contractual day was seven hours, but I worked nine. Please show where ordinary wages and the overtime premium for the two extra hours appear, including the weekly calculation.” If records and the explanation remain inconsistent, take the documents to a Labour Standards Inspection Office or another appropriate public advice service.
Before joining an employer, ask whether its reported overtime includes extra work within statutory limits, how time records are corrected, and what a busy week looks like. The work trial guide covers conditions to check before participating.
Sources: MHLW: basic working-time rules / MHLW: statutory hours and premium pay / MHLW: labour standards rules / MHLW: overtime beyond 60 hours, night and holiday work / MHLW: the premium-pay wage base / MHLW: fixed overtime pay shortfalls
