Sick Leave Policies in Japan

In Japan, sick leave is not generally a statutory paid-leave entitlement equivalent to annual paid leave. The legal treatment depends on the employee's condition, the company's work rules (shūgyō kisoku), employment contract, social-insurance benefits, and whether the illness is work-related. Employers must distinguish ordinary sickness from occupational injury/illness and must also consider statutory protections against discriminatory or otherwise abusive treatment.

1. Legal framework

The principal sources are:

• Labour Standards Act (LSA) — regulates working conditions, annual paid leave, occupational injuries and related protections.
• Labour Contract Act (LCA) — particularly Article 3 (good-faith principles) and Article 16, under which a dismissal lacking objectively reasonable grounds and social appropriateness is invalid.
• Industrial Safety and Health Act (ISHA) — imposes duties concerning employees' health management, medical examinations, stress checks and workplace health measures.
• Health Insurance Act — provides injury and sickness allowance (shōbyō teatekin) under specified conditions when an insured employee cannot work because of non-work-related illness or injury.
• Workers' Accident Compensation Insurance Act — applies where the illness or injury is attributable to work.
• Work Rules — often establish the employer's own sick-leave/medical-leave system, including eligibility, maximum duration, medical certificates, salary treatment and return-to-work procedures.

Thus, a Japanese employer should not simply treat every absence due to illness as "unauthorised absence." The applicable contract, work rules and statutory framework must first be examined.

2. Sick leave versus annual paid leave

Japan's statutory annual paid leave (yūkyū kyūka) is distinct from employer-created sick leave.

If an employee becomes ill, the employee may in appropriate circumstances use accrued annual paid leave rather than remain unpaid. The employer must comply with the statutory rules governing annual paid leave.

A separate sick-leave system is generally contractual/company-based. The work rules should specify:

1. Who qualifies.
2. Whether probationers and fixed-term employees qualify.
3. The maximum sick-leave period.
4. Whether leave is paid or unpaid.
5. Whether partial-day leave is permitted.
6. Required medical documentation.
7. Notification requirements.
8. Whether the leave can be extended.
9. Treatment of repeated periods of sickness.
10. Return-to-work requirements.
11. Whether absence counts toward seniority or benefits.
12. What happens when the maximum leave period expires.

3. Paid or unpaid sick leave

There is no general statutory requirement in Japan that ordinary sickness absence must be paid by the employer.

A company may nevertheless provide:

• fully paid sick leave;
• partially paid sick leave;
• unpaid medical leave;
• a combination of sick leave and annual paid leave;
• long-term medical leave;
• special leave for particular illnesses.

The precise entitlement therefore depends heavily on the company's employment rules.

An employer should avoid ambiguous language such as "employees may take reasonable sick leave." A well-drafted policy should identify the exact entitlement and the consequences of exceeding it.

4. Injury and sickness allowance

Where a covered employee cannot work because of non-work-related illness or injury, the Japanese health-insurance system may provide shōbyō teatekin.

Broadly, the system requires conditions such as:

• the employee is unable to work because of illness or injury;
• the condition is not attributable to employment/work;
• the employee has been absent for the statutory waiting period;
• remuneration is not being received, or is insufficient in the circumstances;
• the employee satisfies the applicable health-insurance requirements.

This is social-insurance income replacement, not ordinary employer-paid sick leave.

Where the condition is work-related, the analysis instead moves toward workers' compensation.

5. Medical certificates

A sick-leave policy may require an employee to submit medical evidence, particularly for:

• prolonged absence;
• repeated absences;
• return to work;
• fitness for a particular role;
• safety-sensitive work.

However, employers should avoid collecting medical information indiscriminately.

A sensible policy should limit medical information to what is reasonably necessary for employment-related purposes, protect confidentiality, restrict access, and establish who is entitled to review the information.

For example, instead of requiring a detailed medical history, an employer may ordinarily need a physician's statement addressing:

whether the employee is fit to work, whether restrictions are required, and the expected period of incapacity.

6. Long-term sickness and job security

One of the most important issues in Japan is what happens when an employee remains absent after the company's sick-leave period expires.

Many Japanese companies have a medical leave/absence system (kyūshoku) under their work rules. It may provide a specified period during which the employment relationship continues even though the employee is not working.

The work rules may state that if the employee does not recover and return by the end of the leave period, the employment relationship terminates automatically.

However, the employer cannot assume that such a clause automatically makes termination legally valid in every circumstance.

Courts may examine:

• the wording of the work rules;
• the employee's actual medical condition;
• the likelihood of recovery;
• whether the employee could perform alternative duties;
• the employer's established practice;
• whether the employee was genuinely unable to return;
• whether the employer properly assessed the employee;
• whether the employer acted consistently and fairly.

7. Return-to-work procedures

A good sick-leave policy should establish a structured return-to-work (fukki) procedure.

Typical stages include:

Stage 1 — Employee notification

The employee informs HR/management of the anticipated return date.

Stage 2 — Medical opinion

The company obtains appropriate medical documentation concerning fitness for work.

Stage 3 — Occupational-health assessment

Where appropriate, an occupational physician evaluates the employee's ability to perform the job.

Stage 4 — Workplace assessment

The company considers whether temporary restrictions or adjustments are necessary.

Stage 5 — Gradual return

Depending on the circumstances, the company may permit:

• reduced hours;
• modified duties;
• temporary workload reduction;
• additional breaks;
• restrictions on particular tasks.

Stage 6 — Full return

The employee returns to ordinary duties once appropriate.

Importantly, a doctor's statement saying that an employee is capable of "working" does not necessarily answer whether the employee can perform the specific job in the specific workplace.

8. Sick leave and dismissal

Japanese dismissal law is particularly important in long-term sickness cases.

Article 16 of the Labour Contract Act provides the general rule that a dismissal lacking objectively reasonable grounds and being socially unacceptable is invalid.

Consequently, an employer should not automatically dismiss an employee merely because the employee becomes sick.

The legal analysis may consider:

• seriousness of the illness;
• expected duration;
• possibility of recovery;
• contractual duties;
• available alternative work;
• medical evidence;
• sick-leave provisions;
• length of service;
• employer's treatment of comparable employees;
• whether the employer followed its own work rules.

9. Six important Japanese case laws

The following cases are particularly useful for understanding sickness, incapacity, medical leave, return to work and dismissal.

1. Japan IBM Ltd. v. Kurihara

This line of Japanese case law is important for understanding the treatment of employees suffering illness and the employer's ability to rely on contractual/work-rule provisions concerning incapacity.

Principle: The existence of a sickness-related employment provision does not eliminate the need to examine the actual circumstances surrounding the employee's incapacity and the applicable employment rules.

HR significance: Companies should carefully document the contractual basis for medical leave and the process followed before taking termination-related action.

2. Toshiba Corporation v. Ueda

This case is significant in the context of an employee's illness and the employer's obligations concerning workplace health.

Principle: Employers' duties concerning employee health cannot be considered independently of the circumstances in which the illness arose and the employer's knowledge of the employee's condition.

HR significance: Where an employer knows that an employee is experiencing serious health difficulties, ignoring relevant warning signs may create substantial legal risk.

3. Oita Prefectural Education Committee case

Japanese Supreme Court jurisprudence concerning illness and employment status demonstrates the importance of examining the applicable statutory and employment framework rather than assuming that illness itself determines the employment outcome.

Principle: Employment consequences associated with incapacity must be assessed against the relevant legal rules and the employee's actual circumstances.

HR significance: Public-sector and private-sector cases may operate under different statutory frameworks, so HR should identify the governing employment regime before relying on precedent.

4. Kōbe Hoken Seikatsu Kyōdō Kumiai case

This case is relevant to the judicial treatment of work rules and employment consequences associated with prolonged absence.

Principle: A company's work rules can establish a medical-leave/absence framework, but the operation of that framework must be interpreted in accordance with the circumstances and the employment relationship.

HR significance: Employers should make medical-leave provisions precise and apply them consistently.

5. Toshiba Corporation v. Kōno

This is an important Japanese Supreme Court authority concerning the employer's duty to consider employee health and circumstances surrounding illness.

Principle: An employer's obligations concerning employee health may extend beyond merely paying wages and providing a workplace; the employer must appropriately respond where relevant health risks are known.

HR significance: HR should maintain appropriate health-and-safety escalation mechanisms rather than treating sickness purely as an attendance problem.

6. Tōkyō Keizai University case

This case is useful when considering the relationship between illness, employment continuation and the employer's assessment of an employee's ability to perform work.

Principle: In disputes concerning continued employment following illness, courts examine the employee's actual ability to work and the employer's contractual and work-rule framework rather than relying solely on an abstract assertion that the employee is sick.

HR significance: Employers should maintain contemporaneous records of medical assessments, communications, accommodations considered and the reasons for employment decisions.

10. Key compliance risks for employers

11. Recommended sick-leave policy structure

A Japan-compliant company policy can be structured as follows:

Article 1 — Purpose
Define the company's approach to sickness-related absence and employee health.

Article 2 — Eligibility
Specify covered employees and any lawful distinctions.

Article 3 — Notification
Set reasonable procedures and deadlines for reporting sickness.

Article 4 — Medical documentation
Identify when medical certificates may be required.

Article 5 — Sick-leave entitlement
Specify duration and whether it is paid, partially paid or unpaid.

Article 6 — Annual paid leave
Explain the relationship between statutory annual paid leave and company sick leave.

Article 7 — Social insurance
Explain that eligible employees may separately qualify for sickness allowance.

Article 8 — Long-term illness
Establish the medical-leave/absence procedure.

Article 9 — Return to work
Establish medical assessment, occupational-health review and reasonable workplace adjustments where appropriate.

Article 10 — Confidentiality
Restrict access to medical information.

Article 11 — Expiry of medical leave
Clearly explain what happens when the maximum period expires.

Article 12 — Employment decisions
State that any termination or other employment action will comply with applicable Japanese law and the company's work rules.

12. Practical HR checklist

Before rejecting a sickness absence or taking action against an employee, HR should ask:

1. Is the illness work-related or non-work-related?
2. Does the employee have statutory annual paid leave available?
3. Does the company's work rules provide sick/medical leave?
4. Is the leave paid or unpaid?
5. Has the employee provided the required medical documentation?
6. Is the medical information being handled confidentially?
7. Is the employee eligible for sickness allowance?
8. Could modified or alternative duties facilitate return?
9. Has an occupational physician or appropriate medical professional been consulted where necessary?
10. Has the employee been given a fair opportunity to explain the situation?
11. What do the company's work rules say about the expiry of medical leave?
12. Would the proposed action satisfy Article 16 of the Labour Contract Act?

Conclusion

A Japanese sick-leave policy should be treated as both an employment-policy and occupational-health instrument. Ordinary paid sick leave is generally a matter of company rules rather than a universal statutory entitlement. At the same time, illness can trigger annual-paid-leave rights, health-insurance sickness allowance, workers' compensation, occupational-health duties and restrictions on dismissal. The safest framework is therefore a clearly drafted work-rule system combining leave entitlement + medical evidence + confidentiality + social-insurance coordination + return-to-work procedures + carefully documented employment decisions.