In Japan, working hours are generally limited to eight hours a day and 40 hours a week.
But not every workplace is equally busy every day. Some companies are much busier at the end of the month, while others have strong seasonal peaks.
That is where a variable working-hour system can be used.
The name sounds complicated, but the basic idea is simple: employees may work longer on busy days and shorter hours on other days, as long as the schedule is arranged within the rules for a set period.
For example, under a one-month system, the schedule must be arranged so that working hours average no more than 40 hours per week over that period. If a particular day has been set in advance as a 10-hour workday, working nine hours that day does not automatically mean that the ninth hour counts as legal overtime.
The company cannot simply decide afterward:
“Things were busy this week, so we will treat it as a variable working-hour schedule.”
Longer and shorter workdays must be set in advance.
For employers, the system can make it easier to match staffing to the amount of work. Longer hours can be scheduled during busy periods, while shorter hours can be used when business is slower. In some cases, hours that would otherwise become overtime can be built into the regular schedule in advance.
For employees, there can be both advantages and disadvantages. Shorter days or more days off during quiet periods may be welcome. On the other hand, busy periods can mean long workdays, which may be physically tiring.
The system can also be confusing. An employee may think:
“I worked 10 hours today, so why doesn’t all of the time after eight hours count as overtime?”
That is one reason overtime can be harder to understand under this system than under a regular schedule.
Of course, a variable working-hour system does not eliminate overtime pay. Working beyond the hours allowed under the system can still count as overtime and require additional pay.
A one-year variable working-hour system works on the same basic idea, with longer hours during busy periods and shorter hours during quieter ones. However, employers cannot schedule unlimited hours. As a general rule, scheduled working time is limited to 10 hours a day and 52 hours a week, while the overall average must remain within 40 hours per week.
So a variable working-hour system is not automatically good for employers and bad for employees, or the other way around.
It gives workplaces more flexibility to match working hours to busy and quiet periods, but it can also create longer workdays and make overtime harder to understand.
It does not remove the basic idea of an eight-hour day and a 40-hour week. Instead, it allows longer and shorter workdays to be planned in advance within a set period.
