Group home night shifts and "night duty" (shukuchoku): how they differ for labour management

In short: At a group home, whether the night-time arrangement is a "night shift" or "night duty (shukuchoku)" changes labour management completely. A night shift is working time spent doing ordinary care, monitoring and support during the late-night hours (10 p.m. to 5 a.m.), and it requires a late-night premium (25% or more) plus, where there is overtime, a 36 Agreement and an overtime premium. Night duty, by contrast, involves only light, intermittent work such as patrolling and answering the phone, and — where the director of the labour standards inspection office has granted permission — is exempt from the rules on working hours, breaks and days off (Labor Standards Act, Article 41, item 3). But even if it is called "night duty," if the reality is care and monitoring, it is treated as a night shift. This article explains the difference between the two with a practical eye on how to think about the actual work schedule.

"What is the difference between a night shift and night duty?" and "We use night duty, so we must be fine" — these are questions we often hear from the owners and managers of disability-welfare establishments, especially group homes (communal living support). This page is for operators who run disability group homes, and for those who are about to open one. We set out the labour-management difference between night shifts and night duty, how to think about working hours, and how to keep attendance records. Judging an individual labour dispute is outside the scope of this article.

How do night shifts and night duty differ for labour management?

Although both mean "working at night," a night shift and night duty occupy different positions in law.

Aspect	Night shift	Night duty (where permission has been granted)
Actual work	Ordinary care, monitoring and support	Light, intermittent work such as patrolling, answering the phone and standing by for emergencies
Working time	Counts as working time	Exempt from the rules on working hours, breaks and days off
Late-night premium	25% or more for 10 p.m.–5 a.m.	In principle not required (because it is not working time)
36 Agreement	Required where there is overtime or holiday work	In principle not required (because it is not overtime)
Permission / filing	Not required (handled as working time)	Permission of the director of the labour standards inspection office required
Pay	A late-night and overtime premium is paid	A night-duty allowance (the amount is set by agreement between labour and management)

The basis on which night duty is exempt from the working-hours rules is Article 41, item 3 of the Labor Standards Act. It provides that, for "intermittent work" for which the employer has obtained the permission of the director of the labour standards inspection office, the provisions on working hours, breaks and days off do not apply. However, this is premised on "doing only light, intermittent work in a way that secures sleep." This is explained in more detail below.

What happens if it is called "night duty" but is actually a night shift?

The answer, in short, is that the reality, not the label, decides. Even if the duty is called "night duty," if what the worker actually does is care and monitoring — helping users to the toilet, repositioning them, answering call bells and making scheduled rounds — that is not "intermittent work" but ordinary work. In that case the labour standards inspection office will in principle not grant night-duty permission, and the time is handled as working time.

For example, take a group home for five users in which, during the night (from evening until the next morning), one staff member stays in the residence, responds to call bells and assists, and makes rounds every two hours. Even if this arrangement is called "night duty," the reality is "care and monitoring," so it is subject to working-hours rules, premium pay and a 36 Agreement as a night shift. Conversely, if the users are mostly asleep at night and the staff member is only responsible for responding to emergencies and making a few rounds, the arrangement can qualify for night-duty permission. Which it is depends on the actual circumstances of each establishment.

Where is the line between time that counts as working time and time that does not?

Working time is time during which the worker is under the employer's direction and supervision. In addition to time actually spent working, such as assisting and making rounds, the following can also count as working time.

• Time spent on standby, ready to be called (so-called "hand-waiting" time): time spent standing by, ready to work at any moment, counts as working time even if no actual work is performed.
• Time during a nap in which the worker is still obliged to answer calls: even during a nap, if the worker is obliged to answer call bells or respond to emergencies, the time may be judged as working time because the worker is under the employer's direction and supervision.

Case law likewise treats time as working time where the worker is obliged to remain on standby in the night-duty room even during a nap or a break. Simply labelling time a "break" or a "nap" does not make it working time exempt if, in reality, the worker is not free to use the time.

How should breaks, naps and standby be handled on the work schedule?

When drawing up a work schedule, the following three should be considered separately.

1. Break: time given in the middle of working hours for the worker to use freely. Only a "break that is freely usable" can be excluded from working time.
2. Nap: a nap can be treated as a break only if the worker is free to rest, without an obligation to answer calls. A nap on the premise of answering calls is working time (hand-waiting time).
3. Standby: time spent standing by, ready to be called, is in principle working time.

Accordingly, even if the schedule says "2-hour break," if the worker is in fact answering call bells many times during that period, it is not a break, and the time counts as working time subject to the late-night premium. The figures on the schedule must match the reality.

What is the relationship with night-duty permission?

To be exempt from the working-hours rules as night duty, the permission of the director of the labour standards inspection office is required. The permission covers "intermittent night duty or day duty" under Article 23 of the Ordinance for Enforcement of the Labor Standards Act, and is premised on roughly the following.

• Not performing the worker's ordinary duties (patrolling, receiving documents and phone calls, standing by for emergencies, and the like)
• Ordinarily having almost no need to work
• For night duty, being able to secure sufficient sleep during the night

Permission is not granted mechanically based on what is written in the application. The labour standards inspection office judges each case on the basis of the actual work. Night work at a group home that ordinarily involves care and monitoring is unlikely to meet these requirements, and will generally not qualify for night-duty permission. Do not lightly assume that "because it is night duty, working-hours management is unnecessary." Furthermore, even where permission has been granted, time actually spent working, such as providing care, must be paid as working time.

What is the relationship with the 36 Agreement and variable working-hours systems?

For an arrangement that includes night shifts, both the 36 Agreement and a variable working-hours system should be put in order.

• 36 Agreement: to have workers perform overtime or holiday work, an agreement between labour and management must be concluded and filed with the director of the labour standards inspection office (Labor Standards Act, Article 36). Where a night shift involves overtime beyond the statutory working hours (8 hours a day, 40 hours a week), concluding and filing a 36 Agreement is the precondition. For the upper limits, see the upper limit on overtime is set by the 36 Agreement.
• Variable working-hours system: shift work that includes night shifts is often operated under a monthly or yearly variable working-hours system, under which the total scheduled hours can be kept within the period even if a particular day or week is long. However, the late-night premium (10 p.m.–5 a.m.) is still required under a variable working-hours system.

Both need to be consistent with the work rules and the wage regulations. For when work rules are required, see from how many employees are work rules mandatory.

What happens to the late-night premium?

Where a worker is made to work at night, between 10 p.m. and 5 a.m., the employer is obliged to pay a premium of at least 25% of the ordinary wage (Labor Standards Act, Article 37, paragraph 3). Where overtime extends into the late-night hours, the overtime premium (25% or more) and the late-night premium (25% or more) are combined, making 50% or more; where statutory holiday work extends into the late-night hours, it is 60% or more.

Because a night shift includes the late-night hours, the late-night premium is a point that must always be kept in mind in practice. In payroll, the ordinary hourly wage and the premium rates must be calculated separately. For the approach to payroll, see how much does it cost to entrust payroll to a Shakai Hoken Roumushi.

How should attendance records be kept?

For both night shifts and night duty, the start and end times must be recorded by an objective method (a time card, time clock, attendance system, or the like). In addition, keeping the following records can serve as rebuttal evidence if it is claimed that "the reality is a night shift."

• The times and number of rounds, and the times and contents of call-bell responses
• The actual state of naps and breaks
• Who did what work during which time period (reconciling the shift table with actual records)

If the work schedule (the plan) and the actual records do not match, this is disadvantageous in a labour standards inspection or a claim for unpaid premium wages. Record the "reality," not the "plan."

What should an owner check before opening?

Before opening a group home, or before reviewing the night-time arrangement, check the following.

1. The staffing standards and the category under the remuneration system (the night support structure add-on distinguishes "where a night-shift worker is assigned" from "where a night-duty worker is assigned")
2. Whether night-duty permission is necessary and can be obtained (if the reality is care and monitoring, handle it as a night shift)
3. The state of the 36 Agreement, the variable working-hours system and the work rules
4. The method of recording attendance, and a mechanism for reconciling the shift table with actual records

Note that the designation application for disability-welfare services and the documents filed with public agencies in connection with remuneration add-ons are the work of a Gyoseishoshi (administrative procedures legal specialist); securing and leasing a property is the work of a real estate business (real estate broker). Labour matters (work rules, the 36 Agreement, payroll) are the work of a Shakai Hoken Roumushi. At Yotsuba, each of these is a separate business, and each is engaged under a separate contract.

Who should be asked to do what?

What is done	Whose work it is
Putting in order the work rules, the 36 Agreement and the variable working-hours system; designing attendance management; calculating premium wages	Shakai Hoken Roumushi (this office)
Preparing documents filed with public agencies, such as the designation application for disability-welfare services and filings for remuneration add-ons	Gyoseishoshi (四葉行政書士事務所 — a separate business)
Securing and leasing the property	Real estate (a real estate broker)
Claims for unpaid premium wages, disputes, labour tribunal proceedings and litigation	Attorney

Putting night-shift and night-duty labour matters in order is the work of a Shakai Hoken Roumushi. This office handles designing working hours and premium pay that match the reality, and building the attendance-recording structure. Work of a Gyoseishoshi, such as designation applications, and work of a real estate business, such as the property, are each engaged separately under a separate contract with a separate business.

What can 四葉社会保険労務士事務所 do?

四葉社会保険労務士事務所, in Kohinata, Bunkyo City, handles sorting out the reality of night shifts and night duty, putting in order the work rules, the 36 Agreement and a variable working-hours system, designing attendance management, and calculating premium wages. For putting in order the staffing standards and labour matters of disability-welfare establishments, see staffing standards and labour for disability-welfare establishments; for the overall picture of labour management in care and disability welfare, see labour management for care and disability welfare. Consultation is free. For fees, see the fee schedule.

Designation applications for disability-welfare services are handled by 四葉行政書士事務所 (a separate business, engaged under a separate contract). This office receives no referral fees.

Frequently asked questions

Q. If we make the night work at our group home "night duty," do we no longer need to manage working hours?
A. Even if you change the label to night duty, if the reality is care and monitoring of users, the time is handled as working time. Night-duty permission can be obtained only for light, intermittent work such as patrolling and answering the phone, where sleep can be secured. First sort out the reality, and then judge each case individually.

Q. If we have night-duty permission, is the late-night premium unnecessary?
A. Because permitted night duty is exempt from the working-hours rules, it is in principle not subject to the late-night premium. However, even with permission, time actually spent working, such as providing care, must be paid as working time (including the late-night premium).

Q. Can a nap during a night shift be excluded from working time as a break?
A. If the worker is still obliged to answer call bells or respond to emergencies during the nap, the time is not freely usable, so it cannot be treated as a break and counts as working time (hand-waiting time). To exclude a nap as a break, the obligation to respond during that period must be removed, and a state in which the worker is in fact free to rest must be secured.

Q. If we use a variable working-hours system for a shift that includes night work, does the late-night premium become unnecessary?
A. No. A variable working-hours system is a mechanism for adjusting scheduled working hours within the total for the period; the late-night premium (10 p.m.–5 a.m.) must still be paid even under a variable working-hours system (Labor Standards Act, Article 37, paragraph 3).

Sources

• Labor Standards Act (Act No. 49 of 1947), Article 32 (statutory working hours), Article 36 (36 Agreement), Article 37 (premium wages; late-night premium 25% or more), Article 41, item 3 (exemption for surveillance or intermittent work)
• Ordinance for Enforcement of the Labor Standards Act (Ministry of Health and Welfare Ordinance No. 23 of 1947), Article 23 (permission for intermittent night duty or day duty)
• Permission for night duty is premised on light, intermittent work (not performing the worker's ordinary duties; patrolling; receiving documents and phone calls; standing by for emergencies) with ordinarily almost no need to work. The labour standards inspection office judges each case on the basis of the actual work.
• Whether time counts as working time depends on whether the worker is "under the employer's direction and supervision." The statement that time on standby or during a nap counts as working time (hand-waiting time) where there is an obligation to answer calls is a general proposition based on administrative interpretation and case law.
• The staffing standards for disability-welfare services (communal living support) and the night support structure add-on follow the remuneration notice and notifications of the Ministry of Health, Labour and Welfare and the practice of the designating authority (municipality). The unit amounts, categories and staffing of the add-on are revised each fiscal year, so please check the latest notice and notifications.
• The late-night premium rate, the overtime premium rate and the approach to night-duty permission are based on materials published by the Ministry of Health, Labour and Welfare and the prefectural labour bureaus (as of August 2026).

This article does not decide whom to consult. Putting in order the work rules, the 36 Agreement and a variable working-hours system, designing attendance management and calculating premium wages is the work of a Shakai Hoken Roumushi. Preparing documents filed with public agencies, such as the designation application for disability-welfare services and filings for remuneration add-ons, is the work of a Gyoseishoshi; securing and leasing the property is the work of a real estate business (real estate broker). Claims for unpaid premium wages and disputes are the work of an attorney. 四葉社会保険労務士事務所 and 四葉行政書士事務所 are separate businesses, and each is engaged under a separate contract. This office receives no referral fees. For fees when consulting 四葉社会保険労務士事務所, see the fee schedule; for frequently asked questions, see the FAQ.

This article is general information. A judgment on individual circumstances is made by a qualified professional after a consultation. Written by Joji Uramatsu (Shakai Hoken Roumushi, Gyoseishoshi, Registered Real Estate Transaction Specialist).