Mandatory vs. Voluntary Training Distinctions under Japanese Labour Law

In Japan, the key legal distinction is not simply whether an employer calls training “mandatory” or “voluntary.” The more important question is whether, in substance, the employee is placed under the employer’s direction and supervision (指揮命令下). This distinction is particularly important for determining whether training time is working time and therefore potentially subject to wages and overtime premiums.

The Ministry of Health, Labour and Welfare (MHLW) expressly states that training or education required as part of the job, or study undertaken at the employer's direction, constitutes working time. Even training labelled voluntary can become working time where participation is effectively compelled.

1. Meaning of mandatory training

Mandatory training generally includes training where:

• attendance is expressly ordered by the employer;
• the employee must complete the course to perform assigned duties;
• completion is required for appointment, promotion or continued assignment;
• absence can result in disciplinary or other disadvantage;
• the employee must submit reports, tests or assignments;
• the training is necessary for legally required safety or health compliance;
• the employer determines the content, timing, place or method of participation.

Where these circumstances exist, the training will generally constitute working time, including when conducted outside normal working hours. MHLW guidance specifically identifies mandatory training and employer-directed learning as working time.

For certain hazardous operations, the Occupational Safety and Health Act also requires special education. MHLW states that employers must provide special safety or health education before workers undertake certain dangerous or hazardous work.

2. Meaning of voluntary training

A genuinely voluntary training programme is different.

Examples include:

• an optional language course;
• an employee's voluntary professional-development programme;
• optional seminars unrelated to current duties;
• self-study undertaken entirely on the employee's own initiative;
• voluntary participation outside working hours where there is no penalty or disadvantage for non-attendance.

MHLW guidance gives examples of genuinely voluntary study sessions and voluntary training that are not working time.

However, “voluntary” written on an invitation is not conclusive.

If employees understand that refusing to participate will harm their evaluation, promotion prospects, assignment, employment status or relationship with management, the training may be treated as effectively mandatory.

3. Mandatory vs. voluntary training — comparison

The decisive issue is substance rather than terminology.

4. The “effective compulsion” test

Japanese labour authorities examine whether participation is substantively compulsory.

Relevant indicators include:

1. Was attendance expressly ordered?
2. Was attendance expected by the employee's supervisor?
3. Would non-attendance produce disciplinary consequences?
4. Would non-attendance adversely affect evaluation or promotion?
5. Could the employee perform the assigned job without the training?
6. Was the training directly connected with the employee's duties?
7. Was a report or examination required?
8. Did the employer determine when and where the employee had to participate?
9. Did the employer pay for the programme?
10. Was participation necessary for obtaining or retaining a particular assignment?

MHLW specifically instructs authorities investigating training-related working-time disputes to examine the training's content, workplace rules, records, employer instructions, employer involvement, relationship with work and disadvantages associated with non-participation.

5. Training outside normal working hours

A common employer mistake is:

“The training is after work, therefore it is voluntary.”

That conclusion is legally unsafe.

If the employee is effectively required to attend, the fact that training takes place after working hours does not remove it from working time.

The Supreme Court's approach to working time is that the issue is objectively determined by whether the worker was under the employer's direction and supervision. In Mitsubishi Heavy Industries, Nagasaki Shipyard, the Supreme Court held that activities required or effectively compelled by the employer as necessary preparation for work can constitute working time even where they occur outside scheduled hours.

The same reasoning is highly relevant to mandatory training.

6. Six important Japanese cases / decisions

Case 1 — Mitsubishi Heavy Industries, Nagasaki Shipyard Case

Supreme Court, First Petty Bench, 9 March 2000

This is one of the fundamental Japanese authorities concerning the meaning of working time.

The Supreme Court held that working time is objectively determined by whether the employee is under the employer's direction and supervision. It further recognized that preparatory activities can constitute working time when employees are required or effectively compelled to perform them.

Relevance to training:
An employer cannot avoid working-time obligations merely by scheduling mandatory preparation or training outside ordinary hours.

Principle:

Substance and employer control matter more than the employer's label.

Case 2 — Daisei Building Management Case

Supreme Court, First Petty Bench, 28 February 2002

The case concerned standby/sleeping time during building-management work.

The Supreme Court held that even periods in which employees were not actively performing work could constitute working time where they were not genuinely released from the employer's control.

Relevance to training:
The employee does not have to be continuously performing productive tasks. If the employee remains under employer control and cannot freely disengage, the period can constitute working time.

This principle helps distinguish:

• genuine voluntary learning → employee is free to disengage;
• compulsory training → employee remains under employer direction.

Case 3 — Maruju Higashi Steel Transport & Warehouse Case

Osaka District Court, Sakai Branch, 11 January 1978

The employer held workplace safety meetings for all employees and required attendance. The meetings communicated company safety measures and provided employee safety education.

The court regarded attendance as part of company business and treated the meeting time as working time. Where the meeting occurred outside scheduled hours, the employer was required to pay overtime compensation.

Relevance:
Safety education is a classic example of training that is functionally mandatory because it is connected directly with workplace operations.

Case 4 — Daikurex Case

Nagasaki District Court, 26 February 2021

This case concerned a seminar organised by a parent company for employees of related companies.

Although the programme was described as voluntary, the court considered factors including:

• the seminar's relationship with the employer's business;
• its connection with company products;
• the employer-related location;
• employer payment of costs; and
• statements that participation was necessary for becoming a regular employee.

The court concluded that participation was effectively compulsory and treated the seminar time as working time.

Important lesson:
Calling a programme “自由参加” (“free participation”) does not necessarily make it voluntary in law.

Case 5 — Maehara Yōdan Case

Osaka District Court, 3 March 2020

The case concerned employee participation in company study meetings.

The issue was whether attendance constituted working time even though the employer did not necessarily impose an explicit disciplinary sanction for non-attendance.

The court's approach illustrates that actual workplace circumstances, including the nature of the meetings and expectations surrounding attendance, can establish employer control.

Relevance:
An employer should not assume that the absence of a formal disciplinary rule automatically makes training voluntary.

This case is particularly useful for analysing informal compulsory training, where supervisors communicate expectations without issuing a formal written order.

Case 6 — Labour Insurance Appeals Decision, Heisei 28 Labour No. 485

This decision is particularly useful because it involved new-employee training and self-study.

The decision distinguished between:

• self-study where the employer did not specify the content, time, location or method; and
• preparation/reporting activities that the employer actually required.

The independently conducted study was not treated as working time where employer direction was insufficient. Conversely, preparation of a training diary was treated as working time because the company required it as an employment-related report and specified its content, length and deadline.

Key principle:
The same training programme can contain both:

• non-working voluntary study, and
• working-time compulsory activities.

This is an especially important distinction for modern corporate learning programmes.

7. Voluntary training can become mandatory in practice

Consider this example:

Company says: “Saturday leadership workshop is voluntary.”

But managers repeatedly tell employees:

“People who want promotion should attend.”

The company then gives higher performance ratings to attendees.

Although the written policy says voluntary, the factual situation may demonstrate effective compulsion.

The opposite example:

Company announces an optional English course. Employees can attend or decline without any employment consequence. The course is unrelated to current duties.

This is much more likely to remain genuinely voluntary. MHLW specifically gives optional foreign-language training unrelated to work as an example of training that may fall outside working time.

8. Statutory safety training is a separate category

Employers must distinguish ordinary professional-development training from statutorily required safety and health education.

Under the Occupational Safety and Health Act framework, certain employees must receive special education before undertaking specified hazardous work.

The Occupational Safety and Health Regulations also prescribe specified educational requirements for supervisors and other roles.

Consequently, an employer cannot normally convert legally required safety education into an unpaid “optional learning programme” simply by changing the wording of its internal policy.

9. Training and work rules

Training provisions can also appear in Rules of Employment (就業規則).

Japanese employment-law materials identify vocational-training matters among matters that can be addressed in work rules.

A properly drafted policy should therefore identify:

• mandatory training;
• optional training;
• eligibility;
• attendance requirements;
• assessment requirements;
• whether training is conducted during working hours;
• treatment of training outside scheduled hours;
• travel time where relevant;
• required reports;
• consequences of non-attendance;
• safety/legal training;
• recordkeeping.

10. Employer's HR compliance approach

A Japanese employer should ideally classify every programme into one of three categories:

Category A — Legally/operationally mandatory

Examples:

• statutory safety education;
• legally required certification;
• training essential to assigned duties;
• employer-directed compliance training.

Treatment: normally working time, with appropriate wage/overtime treatment.

Category B — Employer-required professional training

Examples:

• mandatory leadership training;
• mandatory software training;
• compulsory onboarding;
• mandatory product training.

Treatment: generally working time where employees are under employer direction.

Category C — Genuine voluntary development

Examples:

• optional language classes;
• voluntary career-development seminars;
• optional external courses;
• independent study.

Treatment: generally outside working time if participation is genuinely free and employees are not subjected to employment-related disadvantages for declining.

11. Important distinction: “voluntary” does not mean “unpaid”

These concepts should not be confused.

Voluntary asks:

Must the employee participate?

Working time asks:

Is the employee under the employer's direction and supervision?

Therefore, an employer should not simply write:

“Participation is voluntary and therefore unpaid.”

Instead, it should examine the actual circumstances.

MHLW's current guidance specifically emphasizes that even when workers report time as “voluntary training, education or study,” the employer must treat it as working time if the worker was actually performing duties under the employer's direction and supervision.

12. Practical compliance checklist

Before classifying training as voluntary, HR should ask:

A. Attendance

• Is attendance expressly required?
• Is attendance expected by managers?
• Is absence recorded?

B. Consequences

• Can absence affect promotion?
• Can it affect appraisal?
• Can it affect bonuses?
• Can it affect assignment?
• Is discipline possible?

C. Work relationship

• Is the training necessary for current duties?
• Is it legally required?
• Is it connected with company operations?

D. Employer control

• Does the company determine the time?
• Place?
• Curriculum?
• Instructor?
• Assignments?
• Tests?
• Reports?

E. Time recording

• Is training recorded in working-time systems?
• Is overtime recorded?
• Are employees asked to perform training after clocking out?

F. Documentation

• Keep attendance records.
• Keep training instructions.
• Preserve invitations and emails.
• Document whether participation is actually optional.
• Document consequences of non-attendance.

13. Core legal distinction

The Japanese position can therefore be summarized as follows:

Mandatory training → generally working time.

Genuinely voluntary training → generally not working time.

Apparently voluntary but practically compulsory training → potentially working time.

Self-study genuinely undertaken independently → generally not working time.

Employer-directed study, assignments or reports → potentially working time.

The decisive concept is 指揮命令下 (under the employer's direction and supervision), rather than the label placed on the programme. The Supreme Court's working-time jurisprudence and MHLW's specific training guidance reinforce this substance-over-label approach.

Conclusion

For Japanese HR purposes, the safest distinction is not “mandatory versus voluntary” in the contractual wording alone, but mandatory/effectively compulsory versus genuinely voluntary in actual workplace practice. A training programme becomes legally significant when the employee cannot realistically refuse it without employment-related consequences or when the employer directs the employee's participation, preparation or follow-up work.

This is particularly important for after-hours training, onboarding, compliance programmes, safety education, promotion training, certification programmes, online learning and mandatory e-learning, because describing them as “training” or “voluntary” does not by itself determine whether the time is working time.