Japan Business Days Calculator
Count working days in Japan over any span, after weekends, its 16 public holidays and any leave you book.
About Japan Business Days Calculator
Weekend days are derived from the number of whole weeks in the span, then public holidays and booked leave are subtracted. Multiplying by hours per day converts the result into the capacity figure used for planning. Japan calendar. Project plans quoted in calendar days overstate available capacity by roughly 30% before holidays are even considered.
Formula
Japan Business Days
Working days = calendar days − weekend days − public holidays − leave
- calendar days
- Total days in the span
- public holidays
- Holidays that land on what would be a working day
Frequently Asked Questions
How is Japan Business Days calculated?
Working days = calendar days − weekend days − public holidays − leave Weekend days are derived from the number of whole weeks in the span, then public holidays and booked leave are subtracted. Multiplying by hours per day converts the result into the capacity figure used for planning.
Why does Japan Business Days matter?
Japan calendar. Project plans quoted in calendar days overstate available capacity by roughly 30% before holidays are even considered.
What values do I need to enter?
This calculator takes 5 inputs: Calendar days in the period, Non-working days per week, Public holidays falling on a working day, Annual leave taken in the period, Working hours per day. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.
Related Calculators
Japan specifics
- Currency
- ¥ JPYJapanese Yen
- Region
- Asia
- Country code
- JP
- Amounts look like
- ¥1,234,568
- Dates look like
- Mar 9, 2026
- Units
- metricWeek starts Sunday
In Japan, JPY has no minor unit, so amounts are whole numbers.
Results on this page are expressed in JPY (Japanese Yen). Figures are estimates for general planning — confirm current rates and thresholds with the relevant Japan authority before relying on them.