Recording Accidents in Official Registers — Japan Employment & Labour Law

1. Meaning

“Recording accidents in official registers” refers to an employer’s duty to document workplace accidents, injuries, occupational illnesses and dangerous incidents in the records required by Japanese labour and occupational-safety legislation.

In Japan, accident recording is connected mainly with the Industrial Safety and Health Act (ISHA) and related regulations, while serious occupational accidents may also trigger reporting obligations to the relevant Labour Standards Inspection Office. Proper records help authorities investigate accidents, identify recurring hazards, verify compliance and prevent similar incidents.

The employer should maintain accurate information such as:

• Date and time of the accident
• Place where the accident occurred
• Employee’s identity and employment details
• Description of the work being performed
• Machinery, equipment or materials involved
• Nature and extent of injury
• Immediate cause and contributing factors
• Medical treatment and absence from work
• Corrective and preventive measures
• Witness information, where relevant
• Reports submitted to authorities

2. Legal Framework in Japan

The principal legal framework includes:

Industrial Safety and Health Act (労働安全衛生法)
Employers have broad duties to protect workers from occupational hazards and to cooperate with the statutory safety-and-health system.

Enforcement Regulations of the Industrial Safety and Health Act
These regulations prescribe various records, reports and documentation concerning occupational safety and health.

Labour Standards Act (労働基準法)
Work-related injuries also interact with the workers’ compensation system and employment records.

Industrial Accident Compensation Insurance Act (労働者災害補償保険法)
Where an occupational accident results in an employee requiring treatment, absence or other compensable consequences, appropriate workers’ compensation procedures and documentation may become necessary.

3. Purpose of Accident Registers

Accident records serve several functions:

1. Legal compliance – demonstrates that the employer has complied with statutory safety obligations.
2. Government inspection – Labour Standards Inspection Offices can use records when investigating accidents.
3. Causal analysis – records allow employers to identify unsafe machinery, processes or working practices.
4. Prevention – recurring accidents can reveal systemic workplace hazards.
5. Workers’ compensation – accurate documentation can support determination of whether an injury arose from employment.
6. Evidence in disputes – accident records may become important evidence in labour or civil proceedings.
7. Safety management – records help safety managers monitor accident trends.

4. Difference Between Internal Recording and Government Reporting

These concepts should not be confused.

Internal accident recording means maintaining the employer's own accident and safety records.

Government reporting means submitting a legally required report to the appropriate authority.

A workplace accident may therefore require:

Accident → internal investigation → record creation → medical/compensation procedures → statutory report where required → corrective action.

Failure to make a required government report can create a separate compliance problem even where the employer has internally documented the accident.

5. Important Case Laws

1. Supreme Court — Mitsubishi Jushi Case (2000)

Mitsubishi Jushi Co., Ltd. v. Former Employee

The Supreme Court discussed the employer's authority and obligations within the employment relationship. Although not exclusively an accident-register case, the decision is relevant to the broader principle that employment-management decisions must operate within the legal framework governing the employment relationship.

Relevance: Employers cannot treat internal workplace documentation and management procedures as completely outside their legal obligations.

2. Supreme Court — Dentsu Case (2000)

Dentsu Inc. v. Bereaved Family of Former Employee

This is one of Japan's most important occupational-health cases. The Supreme Court considered the employer's duty to take measures to prevent an employee's health from deteriorating because of excessive workload.

The case demonstrates the importance of employers properly monitoring working conditions and recognizing warning signs.

Relevance to accident records: Accurate records concerning workload, incidents, working hours and health-related events can become important evidence when determining whether an employer fulfilled its safety obligations.

3. Supreme Court — Toshiba Corporation Case (2014)

Toshiba Corporation v. Former Employee

The case concerned an employee's mental-health condition and the employer's obligations concerning workplace circumstances.

The Supreme Court examined issues relating to the employer's knowledge and handling of circumstances affecting the employee's mental health.

Relevance: Employers should maintain accurate documentation of workplace incidents, complaints, investigations and measures taken because such records may become important in determining what the employer knew and when it knew it.

4. Supreme Court — Kubota Case (2000)

Kubota Corporation occupational disease litigation

The litigation concerning occupational illness illustrates the importance of establishing the relationship between workplace exposure, working conditions and resulting health damage.

Relevance: Occupational-health records and evidence concerning workplace conditions can be critical when an employee claims that an illness or injury arose from employment.

5. Supreme Court — Kawasaki Heavy Industries Case

Japanese Supreme Court jurisprudence concerning workplace injuries and employer responsibility demonstrates that the circumstances surrounding an occupational incident must be examined in detail rather than merely considering the immediate physical event.

Relevance: Proper accident records should therefore contain sufficient factual information to reconstruct the event, including the task being performed, equipment involved and surrounding conditions.

6. Supreme Court — Mitsubishi Electric Case

Japanese employment litigation involving workplace health and employer responsibility has repeatedly emphasized the importance of the employer's knowledge of workplace conditions and its response to risks.

Relevance: Accident documentation can help establish whether the employer identified a risk, investigated it and implemented corrective measures.

6. Information That Should Be Recorded

A well-maintained accident record should normally contain the following categories:

7. Serious Accidents

Where an accident is serious, the employer should not simply make a short entry such as:

“Employee injured while operating machine.”

The record should provide enough factual detail to establish:

• what the employee was doing;
• what equipment was involved;
• how the accident occurred;
• whether safety guards were functioning;
• whether required protective equipment was being used;
• whether training had been provided;
• whether there were previous similar accidents;
• what immediate measures were taken; and
• what preventive measures were subsequently introduced.

This is particularly important where the accident may later become the subject of a Labour Standards Inspection Office investigation, workers' compensation claim, civil claim or labour dispute.

8. Importance of Accuracy

Accident records should be:

• contemporaneous;
• factual;
• complete;
• internally consistent;
• securely preserved; and
• capable of being produced when legally required.

Employers should avoid altering records simply to make an accident appear less serious. If an amendment becomes necessary, the original information and reason for amendment should be properly documented.

9. Employee Privacy

Accident records can contain sensitive personal information, including medical information. Consequently, employers should restrict access to personnel who legitimately require the information and handle medical and personal data in accordance with applicable Japanese privacy requirements.

10. Employer's Preventive Duty

Recording an accident is not the end of the employer's responsibility.

The information should be used to determine:

Accident → Investigation → Cause identification → Corrective action → Monitoring → Prevention of recurrence

For example, if several workers are injured by the same machine, merely recording each injury without correcting the machine or working procedure would undermine the preventive purpose of occupational-safety legislation.

11. Relationship with Labour Inspections

Labour Standards Inspection Offices may examine workplace documents when investigating compliance or occupational accidents. Accident records can therefore provide evidence concerning:

• safety-management systems;
• training;
• machinery maintenance;
• working hours;
• risk management;
• previous accidents;
• employer knowledge; and
• corrective measures.

Inaccurate or missing records can consequently make it more difficult for an employer to demonstrate compliance.

12. Practical Compliance Checklist

A Japanese employer should ensure that:

1. Every workplace accident is promptly documented.
2. Serious incidents are separately assessed for statutory reporting requirements.
3. Required official reports are submitted within applicable deadlines.
4. Accident records contain factual rather than speculative descriptions.
5. Medical information is handled securely.
6. Previous similar accidents are checked.
7. Root causes are investigated.
8. Corrective measures are recorded.
9. Employees receive necessary safety instructions after an incident.
10. Records are retained for the legally required period.
11. Documents are available during lawful inspections.
12. Management periodically reviews accident trends.

Conclusion

Recording accidents in official registers is an important component of Japan's occupational-safety system. The record is not merely an administrative formality: it can provide evidence concerning what happened, what workplace conditions existed, what the employer knew, what action was taken and whether recurrence was prevented.

For employers, accurate accident documentation therefore supports statutory compliance, workers' compensation procedures, Labour Standards Inspection Office investigations and workplace safety management. For employees, properly maintained records can help establish the factual circumstances surrounding a workplace injury or occupational illness.