🗓️ Four days of work, three days for yourself. The "4-day work week" has become a familiar policy name in Japan. From April 2025, Tokyo Metropolitan Government and national civil servants can choose it. But according to the labor ministry, just 0.9% of companies actually run any form of three-day weekend. The signage and the reality are still far apart.

What Is Japan's 4-Day Work Week? Three Implementation Models

The 4-day work week (週休3日制/shūkyū mikka-sei) means having three days off per week instead of the standard two. Since being included in the government's 2021 economic policy guidelines, adoption has steadily increased among companies and local governments.

There are three main implementation models.

The Salary-Maintained Model reduces working hours while keeping pay unchanged. Employees work 32 hours instead of 40, with no salary cut. This is ideal for workers but requires significant productivity improvements from companies.

The Total Hours-Maintained Model extends daily work hours from 8 to 10, maintaining 40 hours across 4 days. Since pay remains the same, this is the most commonly adopted approach among Japanese companies.

The Salary-Reduced Model cuts pay proportionally to reduced work days. Working 4 days means receiving roughly 80% of the original salary. In a December 2021 Mynavi survey of 800 full-time employees, 78.5% said they would not want to use this option.

2025: A Turning Point for Government Adoption

2025 marks a pivotal year for Japan's 4-day work week movement.

Tokyo Metropolitan Government launched its selective 4-day work week in April 2025, utilizing a flextime system. Governor Yuriko Koike stated, "We aim to create a society where no one has to give up their career due to life events like childbirth or childcare."

National government employees also gained access to a 4-day work week option starting April 2025. Previously limited to employees with childcare or nursing care responsibilities, the program now extends to all staff.

At the prefectural level, Ibaraki moved first in April 2024, followed by Chiba, Hyogo, Osaka, and Nara. An Asahi Shimbun tally as of January 2025 found 11 more prefectures, including Tokyo, planning to adopt it, for a total of 16 in motion. Miyagi was aiming for fiscal 2025 and Aichi for January 2026.

The reason local governments are moving fast is recruitment. The competition ratio for Tokyo's administrative civil service exam (university-graduate level) fell from 5.6 applicants per place in fiscal 2019 to 1.5 in fiscal 2024.

Major Corporate Adoption Cases

Private sector adoption is accelerating, led by major corporations.

ZOZO introduced a "no pay cut 4-day work week" in April 2021 in its Hospitality Division, which handles customer inquiries. The standard day is 8 hours; employees who choose the four-day option work 10 hours × 4 days to keep total hours unchanged, and they decide every six months whether to use it.

Fast Retailing (Uniqlo) has offered its non-transferring regional employees a 4-day schedule since October 2015, using a monthly variable working hours system. At 10 hours × 4 days the week still totals 40 hours, so pay is unchanged.

Sagawa Express implemented a 4-day work week at some locations to address driver shortages. The system maintains pay parity with 5-day schedules while allowing side jobs.

Panasonic launched 3-day and 4-day work week options in fiscal 2022, but against roughly 60,000 domestic employees, only 153 used the selective four-day option in fiscal 2023 and 138 in fiscal 2024. Having a scheme and having it used turn out to be different things.

Recruit raised annual days off from 130 to 145 when its group companies merged in 2021, which averages out to 2.8 days off per week, hence its label of "roughly a three-day weekend." It lengthened the standard day from 7.5 to 8 hours to keep annual working hours flat, and left pay unchanged.

Benefits and Challenges

Benefits for Employees

Improved work-life balance is the primary benefit. Workers gain time for family, self-development, side jobs, caregiving, and personal pursuits. Reduced commuting also decreases fatigue and stress.

Mynavi's research shows that younger generations prioritize personal time over salary increases, making the 4-day work week a compelling recruitment advantage for companies.

Benefits for Employers

The system helps attract and retain talented employees. As labor shortages intensify due to Japan's aging population, companies offering flexible work arrangements become more attractive to job seekers. It also promotes awareness of productivity improvement and operational efficiency.

In a one-month trial in August 2019 covering about 2,300 full-time staff, Microsoft Japan reported revenue per employee up 39.9% year on year and electricity use down 23.1%. The company later noted that the productivity figure came from several factors, not the four-day week alone.

Challenges and Concerns

Several challenges have emerged with implementation.

Communication gaps are a primary concern. Fewer opportunities for team members to gather can lead to information silos and relationship difficulties.

For salary-reduced models, income reduction is a significant deterrent. For hours-maintained models, longer daily work hours may be burdensome, especially for employees with childcare responsibilities.

Additionally, customer-facing roles like sales may find the system difficult to implement, potentially creating perceptions of unfairness within organizations.

Barriers to Widespread Adoption

According to the ministry's 2025 General Survey on Working Conditions, only 0.9% of companies have any form of three-day weekend as their main system, and 0.0% have a full three-day weekend. That is down from 1.6% the previous year. The government recommends adoption but has no plans to mandate it, leaving the decision with individual companies.

The slow uptake reflects Japan's deep-rooted overwork culture, the same culture that gave the language the word "karoshi" (death from overwork). The mindset equating long hours with dedication to one's company creates psychological barriers to choosing reduced work schedules.

However, as the World Economic Forum report notes, flexible work arrangements are becoming essential for talent acquisition as labor shortages worsen. The large-scale implementation by Tokyo and national government agencies is expected to create a ripple effect encouraging private sector adoption.

What About Your Country?

The number of schemes has grown; the number of people choosing them has not. Work style reform may be less than half done at the point the rules are written.

How is the 4-day work week discussed in your country? Are more companies adopting it? We'd love to hear about your country's work culture and perspectives on work-life balance!

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