Is night-shift nap time working time at a 24-hour internet cafe? Late-night premiums and one-person shifts

Bottom line first: A night-shift nap is working time, even while asleep, if staying on the premises and responding to customers, calls and trouble is required and release from work is not guaranteed (the general view from the Oboshi Building Management case, Supreme Court First Petty Bench, 28 February 2002). A "break" taken while minding the store alone is standby time, i.e. working time. For the late-night band from 10 p.m. to 5 a.m., a late-night premium (Labour Standards Act Article 37(4), 25% or more) is required so long as the time counts as working time. The internet-cafe business filing (private booths under fire law, identity checks) belongs to a Gyoseishoshi (四葉行政書士事務所, a business entity independent of this office) and the property to a real-estate agent, contracted separately.

This page focuses on the labour side a Shakai Hoken Roumushi handles: whether nap and standby time are working time, late-night premiums, one-person-shift breaks, and designing shifts for long operating hours. The business filings on the operating side are the area of a Gyoseishoshi and the competent authorities.

Is a night-shift nap working time?

Even without actual service during a nap, if staying in the nap room or on the premises is required and you must respond to customers, calls or trouble, so release from work is not guaranteed, the nap counts as working time as a whole. This is the view in the Oboshi Building Management case (Supreme Court First Petty Bench, 28 February 2002), which recognised as working time under Article 32 of the Labour Standards Act the nap time of a building-management employee on an overnight shift.

How the nap is placed	View on working-time status
Staying on the premises/nap room required; duty to respond to customers/calls	Release from work not guaranteed = working time as a whole
Free to leave the worksite, no call-outs, a complete break	Release from work guaranteed = break time
Called a "nap" but reception or patrol in fact continues	Actual work itself = working time

What matters is the reality of whether release from work is guaranteed, not the name "nap" or "break". Leaving one person to run night reception while "napping" is not release from work, so it is treated as working time. The difference between night shift and overnight duty is in How night shift and overnight duty differ at a group home, and the security-industry view of nap time in Is a security guard's nap working time.

When and how much is the late-night premium?

For work in the band from 10 p.m. to 5 a.m., you pay a late-night premium of 25% or more of the ordinary wage (Labour Standards Act Article 37(4)). This applies to naps and standby too, so long as the time counts as working time. Overtime beyond statutory hours (8 a day / 40 a week, Article 32) and statutory-holiday work add further premiums.

Category	Basis	Premium rate
Overtime	Labour Standards Act Article 37(1)	25% or more
Overtime beyond 60 hours a month	Same (applied to SMEs too from 1 April 2023)	50% or more
Statutory-holiday work	Article 37(1)	35% or more
Late-night work (10 p.m.–5 a.m.)	Article 37(4)	25% or more

Where they overlap, the rates add up (e.g. late-night overtime is 25% + 25% = 50% or more). Treating a late-night nap as an "unpaid break" easily leads to unpaid-wage problems. A manager still needs the late-night premium; the relationship between a nominal title and premium wages is in Nominal managers and the late-night premium.

Can you give a break on a one-person shift, and how is standby time treated?

Where working time exceeds six hours you must give at least 45 minutes, and where it exceeds eight hours at least one hour, of break during the working time (Labour Standards Act Article 34(1)). A break must be freely usable (Article 34(3)); minding the store or reception is not a break. Time spent alone standing ready for customers is standby time, not guaranteed release from work, so it is working time, not a break.

Type of time	Working time?	View
Break time	No	Time with a guaranteed right to be released, freely usable (Article 34)
Standby time	Yes	Waiting for customers or instructions, unable to leave the employer's direction

To actually give a break on a one-person shift, you need a way to release the worker — bringing in cover for that time or switching to unmanned handling. The idea of patrol/standby at an unmanned store is set out in Is patrol/standby time at an unmanned 24-hour store working time. An exception to giving breaks all at once is allowed for some industries such as amusement and catering, but whether your store falls in such a category turns on the reality, so we do not conclude here (unverified).

How should you design shifts for long operating hours?

A 24-hour operation has large peaks and troughs, hard to fit into a fixed 8-hour day. A variable working-hours system (one-month unit: Labour Standards Act Article 32-2; one-year unit: Article 32-4) averages hours over a period to within statutory hours, so staffing longer on busy days and shorter on slow days can avoid overtime treatment if the average stays within the limit. But the type, and how it is set in work rules and labour-management agreements, is detailed, and a design error still produces overtime premiums.

System	Basis	Suited to
One-month variable working hours	Labour Standards Act Article 32-2	Peaks by day/weekday within a month
One-year variable working hours	Article 32-4	Seasonal/monthly peaks (agreement and filing needed)
36 Agreement (overtime/holiday cap)	Article 36	The premise where overtime remains

Even with a variable system, the overtime cap (Article 36) and concluding/filing a 36 Agreement are the premise. The scope a 36 Agreement can allow is in How far can a 36 Agreement allow overtime, choosing variable hours in Choosing variable working hours and flextime, and when work rules become mandatory in From how many employees are work rules mandatory.

What should you do for health on long late-night shifts?

Duty including late-night work has health-protection measures. A worker regularly engaged in specified duty including late-night work needs a health check once every six months (Industrial Safety and Health Regulations Article 45). Where a worker in late-night work submits the result of a health check they took themselves, the employer takes measures based on it (Industrial Safety and Health Act Article 66-2). For a worker with accumulated fatigue from long hours, a doctor's interview guidance is given on the worker's request (Article 66-8).

Measure	Basis	Content
Specified-duty health check	Industrial Safety and Health Regulations Article 45	Once every six months for those regularly in late-night duty
Voluntary late-night health check	Industrial Safety and Health Act Article 66-2	Submission of a self-taken result and employer response
Interview guidance for long hours	Article 66-8	Doctor's interview for those with accumulated fatigue

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A continuous one-person late-night setup is also risky because there is no cover if someone is unwell. The specific frequency and target hours of checks and interviews turn on the reality of the duty, so we do not conclude on the individual case here (unverified). The duty design of a facility with night shifts is also useful in Staffing and night-shift labour of a fee-charging home for the elderly.

Who should you consult about the internet-cafe business filings?

The filings on the operating side — fire-law matters of booths, identity checks (which may be required by ordinance in certain forms) — differ in who handles them from a Shakai Hoken Roumushi's labour work.

Procedure	In charge
Fire-law checks of booths/interior, identity checks and other operating-side filings	Gyoseishoshi (四葉行政書士事務所, a business entity independent of this office) / competent authorities
Working-time status of nap/standby, late-night premium, one-person-shift breaks, variable hours, work rules, working-hour management	Shakai Hoken Roumushi (四葉社会保険労務士事務所)
Confirming the store property	Real-estate agent
Tax	Tax accountant

四葉社会保険労務士事務所 accepts labour work as an independent business entity, and where another professional such as a Gyoseishoshi (四葉行政書士事務所) or a real-estate agent is needed, we introduce them under a contract you conclude directly, separately. This office takes no referral fee.

What can 四葉社会保険労務士事務所 do?

What this office takes on is the design of labour so a 24-hour store builds wages and duty matched to the reality of naps and standby, and avoids unpaid late-night premiums or break failures.

• Checking the reality of night-shift nap/standby time and organising the range to treat as working time
• The method of calculating the late-night premium (10 p.m.–5 a.m., Article 37(4)) and overtime/holiday premiums, and the design of fixed overtime pay
• Organising how to give breaks and treat standby time on a one-person shift
• Designing a variable working-hours system (Article 32-2/32-4) for peaks, and concluding/filing the 36 Agreement
• Health-protection measures for late-night duty, and preparing work rules, wage rules, notice of working conditions and working-hour management

The internet-cafe business filings belong to a Gyoseishoshi, the store property to a real-estate agent, and tax to a tax accountant. 四葉社会保険労務士事務所 accepts work as an independent business entity, and where another professional is needed, we introduce them under a contract you conclude directly, separately. There is no referral fee.

Consultations are free of charge. Fees are set out in the fee schedule; see also our services and how a consultation proceeds.

Frequently asked questions

Q. Can a night-shift nap be an unpaid break?
A. Not across the board. Where staying on the premises or in the nap room is required and there is a duty to respond to customers, calls or trouble, so release from work is not guaranteed, it is working time as a whole even while asleep (the general view from the Oboshi Building Management case, Supreme Court First Petty Bench, 28 February 2002). It can be an unpaid break only where it is a complete break with free exit and no call-outs. Which the reality amounts to turns on the specific arrangement.

Q. When and how much is the late-night premium?
A. For work in the band from 10 p.m. to 5 a.m., a late-night premium of 25% or more of the ordinary wage is required (Labour Standards Act Article 37(4)). It applies to naps and standby so long as the time counts as working time. Where it overlaps with overtime (25% or more) or statutory-holiday work (35% or more), the rates add up.

Q. Must you give a break even on a one-person late-night shift?
A. Yes. Where working time exceeds six hours you must give 45 minutes, and over eight hours one hour, of break during the working time (Labour Standards Act Article 34(1)). A break must be freely usable (Article 34(3)); standing by while minding the store is not a break. To give a real break on a one-person shift, you need a way to release the worker, such as bringing in cover for that time.

Q. If you use a variable working-hours system, does overtime pay disappear?
A. No. A variable working-hours system (Labour Standards Act Article 32-2/32-4) averages hours over a period to within statutory hours; work beyond the average needs an overtime premium. The late-night premium arises separately even under a variable system. The type and how it is set in work rules and agreements is detailed, and a design error still produces premiums.

Basis for this article

• Labour Standards Act (Act No. 49 of 1947) Article 32 (working hours = 8 a day / 40 a week), Article 32-2 (one-month variable working hours), Article 32-4 (one-year variable working hours), Article 34 (breaks = 45 min over 6 hours, 1 hour over 8 hours, during the working time; paragraph 3 = free use), Article 36 (overtime and holiday work), Article 37 (premium wages; paragraph 1 = 25% or more overtime, 35% or more holiday, 50% or more over 60 hours a month applied to SMEs too from 1 April 2023; paragraph 4 = 25% or more late-night)
• Industrial Safety and Health Act (Act No. 57 of 1972) Article 66-2 (submission of a voluntary health-check result by a worker in late-night work), Article 66-8 (doctor's interview guidance for long-hours workers)
• Industrial Safety and Health Regulations (Ordinance of the Ministry of Labour No. 32 of 1972) Article 45 (a health check once every six months for workers regularly in specified duty including late-night work)
• Oboshi Building Management case (Supreme Court First Petty Bench, 28 February 2002) — nap time during which staying in the nap room, taking calls and responding to alarms were required, and release from work was not guaranteed, counts as working time under Article 32 as a whole, including time not spent on actual work (general view)
• The industry category for the exception to all-at-once breaks, the specific application of specified-duty checks and interview guidance, and whether a nap or standby amounts to working time in a specific case turn on the reality and the judgement of the Inspection Office and the courts. This article does not conclude on the individual case (unverified)

This article is general information. Individual determinations are made by a qualified professional after a consultation, in light of individual circumstances. 四葉社会保険労務士事務所 can advise on organising the working-time status of night-shift nap/standby time, calculating late-night and overtime/holiday premiums and designing fixed overtime pay, breaks and standby on one-person shifts, designing variable working hours and concluding/filing the 36 Agreement, health-protection measures for late-night duty, and preparing work rules and wage rules. The internet-cafe business filings are handled by a Gyoseishoshi (四葉行政書士事務所), the store property by a real-estate agent, and tax by a tax accountant. 四葉社会保険労務士事務所 accepts work as an independent business entity, and where another professional is needed, we introduce them under a contract you conclude directly, separately; there is no referral fee. Frequently asked questions are collected in the FAQ. Written by Joji Uramatsu (Shakai Hoken Roumushi, Gyoseishoshi, Registered Real Estate Transaction Specialist).