Labour Law in Japan
Overview of Japanese Labour Law
Japanese labour law rests upon three foundational statutes enacted in the immediate aftermath of World War II under the Allied Occupation: the Labor Standards Act (Rodo Kijun Ho, Law No. 49 of 1947, “LSA”), the Labor Union Act (Rodo Kumiai Ho, Law No. 51 of 1945, “LUA”), and the Labor Relations Adjustment Act (Rodo Kankei Chosei Ho, Law No. 25 of 1946, “LRAA”). These statutes were superimposed upon the pre-existing Civil Code (Minpo) framework of contractual freedom and, together with Article 28 of the Constitution of Japan (1946), which guarantees the right of workers to organise, bargain collectively, and act collectively, form the bedrock of Japanese labour regulation. The constitutional guarantee is considered self-executing and directly enforceable, a feature that distinguishes Japanese labour law from many other jurisdictions where constitutional labour rights require legislative implementation.
Japanese labour law is characterised by a distinctive tension between formal statutory protections and the informal norms of the enterprise-based employment system. The lifetime employment (shushin koyo), seniority-based wages (nenko joretsu), and enterprise unionism that defined the post-war model have undergone significant erosion since the burst of the economic bubble in the early 1990s, yet they continue to shape judicial reasoning and legislative reform. The Supreme Court’s application of the general clause of the Civil Code — the abuse of right doctrine (kenti no ran’yo) under Article 1(3) — as the primary vehicle for reviewing dismissal decisions exemplifies how Japanese courts have adapted civil law concepts to serve protective labour functions.
The Constitutional Right to Organise
Article 28 of the Constitution of Japan provides that “the right of workers to organise and to bargain and act collectively is guaranteed.” This provision has been interpreted by the Supreme Court to encompass three distinct but interrelated rights: the right to form and join trade unions (the organising right), the right to engage in collective bargaining with employers (the bargaining right), and the right to engage in collective action, including strikes (the act collectively right). The constitutional status of these rights means that statutes purporting to regulate them are subject to heightened judicial scrutiny, though the Supreme Court has generally deferred to legislative judgments that balance labour rights against competing public interests.
The Labor Union Act gives concrete expression to Article 28 by defining the scope of protected union activities and establishing remedies for unfair labour practices. Section 2 of the LUA defines a “labour union” as any organisation formed autonomously by workers for the purpose of improving their working conditions, provided that it does not admit managerial personnel or representatives of the employer’s interests. This definition excludes company-dominated unions, which are treated as unfair labour practices under Section 7(2). The LUA also confers upon qualified unions the right to demand collective bargaining with the employer (Section 6), imposes a duty on employers to bargain in good faith (Section 7(2)), and affords immunity from civil and criminal liability for “proper” acts of dispute (Section 1(2) and Section 8).
Enterprise Unionism
A defining feature of Japanese labour relations is enterprise unionism (kigyo-betsu kumiai): the overwhelming majority of unionised workers belong to unions organised at the enterprise level rather than by trade, industry, or occupation. Approximately 90% of all unions in Japan are enterprise unions, and the pattern persists despite four decades of declining union density. The unionisation rate stood at approximately 17% as of 2024, having fallen steadily from a peak of 35% in the mid-1970s. This decline reflects the structural shift away from manufacturing, the growth of non-regular employment (part-time, fixed-term, and temporary workers), and the legal obstacles facing union organising among precarious workers.
Enterprise unions typically include both regular employees and, increasingly (though still at lower rates), non-regular workers. They negotiate enterprise-specific collective agreements (rodo kyoyaku) that supplement the statutory floor of the LSA. The enterprise union structure has been both praised for facilitating labour-management cooperation at the firm level — contributing to Japan’s post-war productivity growth — and criticised for marginalising the interests of non-regular workers and discouraging cross-industry solidarity. National-level coordination occurs through the annual Shunto (spring labour offensive), during which enterprise unions coordinate wage demands through industry federations such as the Japanese Trade Union Confederation (Rengo).
The Labor Standards Act: Individual Employment Protection
The Labor Standards Act establishes the statutory minimum terms of employment. Its cornerstone provisions include: the principle of equal treatment (Article 3, prohibiting discriminatory treatment by reason of nationality, creed, or social status); the prohibition of discriminatory treatment between men and women (Article 4); working time regulation (the 40-hour week, 8-hour day under Article 32); overtime and holiday work (Article 33); paid annual leave (Article 39, minimum of 10 days after six months of continuous employment); and the regulation of dismissal (Article 18-2, now codified in the Labour Contract Act).
The regulation of working hours merits particular attention. The LSA prescribes a statutory maximum of 40 hours per week and 8 hours per day. Any work in excess of these limits requires a “36 Agreement” (saburoku kyotei), so named after Article 36 of the LSA, which permits overtime work provided that the employer concludes a written agreement with a labour union representing a majority of workers (or, absent such a union, with a representative elected by a majority of workers) and files the agreement with the Labour Standards Inspection Office. The 36 Agreement must specify the maximum hours of overtime and the days on which holiday work is permitted; it does not, however, displace the obligation to pay premium wages.
The premium rates for overtime are set at 25% above the normal wage for hours worked in excess of the statutory limit, 50% for overtime exceeding 60 hours per month (a reform introduced in 2010 and fully effective from 2019), and 25% for holiday work on the statutory weekly day off. The 2019 reform of the LSA (effective April 2019, with phased implementation for certain industries) introduced an absolute cap on overtime hours: overtime may not exceed 45 hours per month or 360 hours per year in principle, with an absolute ceiling of 720 hours per year (averaging 60 hours per month) and no single month exceeding 100 hours. The reform also introduced the “white-collar exemption” (sogoshoku system) for highly paid professional workers earning above a threshold (approximately ¥10.75 million per year), exempting them from working time regulations under the “discretionary work” system (sairyo rodo sei), provided that their duties involve work requiring highly specialised knowledge and they are subject to the “planning and consideration” provisions of Article 40-2.
Paid annual leave under Article 39 accrues at 10 working days after six months of continuous employment, increasing progressively with length of service to a maximum of 20 days per year. Workers must take at least five days of their annual leave each year, a requirement introduced in the 2019 reforms to address the problem of unused leave (Japan has historically had among the lowest rates of annual leave usage in the OECD).
Dismissal Regulation: The Abuse of Right Doctrine
Japanese dismissal law is a study in the power of judicial gap-filling in the absence of explicit statutory restrictions. The Civil Code (Article 627) permits either party to terminate an indefinite employment contract upon two weeks’ notice. The LSA (Article 20) requires 30 days’ notice or payment in lieu (salary equivalent to 30 days). No statute, however, explicitly limits the employer’s substantive right to dismiss. The courts, beginning with the Supreme Court’s judgment in Nihon Shokuen Co. v. K. (Shokuen K.K. jiken) and the foundational Matsumoto v. Mitsubishi Plastics Industries Ltd. (1973), developed the doctrine that dismissal constitutes an abuse of right under Article 1(3) of the Civil Code where it lacks “objectively reasonable grounds” and is “socially inappropriate.”
The four-factor test crystallised in subsequent Supreme Court decisions examines: (i) whether there were objectively reasonable grounds for the dismissal; (ii) whether the dismissal was socially appropriate in light of the circumstances; (iii) whether the employer followed proper procedures; and (iv) whether the dismissal was disproportionate to the reason asserted. In practice, this test functions as a requirement of “just cause” for dismissal, although the Civil Code framework does not use that terminology. The Labour Contract Act (Rodo Keiyaku Ho, Law No. 128 of 2007, effective 2008) codified the abuse of right doctrine for ordinary dismissals (Article 16) and for fixed-term contracts (Article 17), providing explicit statutory recognition of the judicially developed standard.
In 2006, Japan introduced the Labor Tribunal procedure (Rodo Shinpan) — a specialised, expedited proceeding in the District Courts for individual labour disputes, combining elements of mediation and adjudication. The procedure is designed to resolve disputes, including dismissal claims, within three to four hearings over a period of approximately three months. The rapid growth of the Labor Tribunal docket (over 3,000 cases annually in the early years, stabilising at approximately 1,500–2,000 cases per year by the late 2010s) reflects the procedure’s popularity as an alternative to ordinary civil litigation, though the hybrid structure — a panel of one professional judge and two lay labour experts (rodo shinpan-in) — has attracted criticism for producing inconsistent outcomes across jurisdictions.
Collective Bargaining and Unfair Labour Practices
The Labor Union Act establishes a framework for collective bargaining and enumerates four categories of unfair labour practices (futoi rodo koi) at Section 7: (1) discrimination against workers for union membership or activities (the “yellow dog” prohibition); (2) refusal to bargain collectively without proper justification; (3) domination of or interference with the formation or administration of a union; and (4) discrimination against workers for filing complaints under the LUA or participating in proceedings of the Labour Relations Commission.
Remedies for unfair labour practices are administered by the Labour Relations Commission (Rodo Iinkai) — quasi-judicial administrative bodies at the national (Central Labour Relations Commission) and prefectural levels — which may issue orders for reinstatement, back pay, and cessation of the unlawful practice. The Commission’s remedial orders are subject to judicial review by the courts, which are generally deferential to the Commission’s factual findings. The effectiveness of the Commission system has been questioned, particularly with respect to the delay between the filing of a complaint and the issuance of a remedial order, which in complex cases may extend to several years.
Minimum Wage
Japan operates a regional minimum wage system administered through the Minimum Wages Act (Saishin Chingin Ho, 1959, extensively amended). The Central Minimum Wages Council — a tripartite body composed of representatives of labour, management, and the public interest — recommends guidelines, and the prefectural councils set specific rates for each prefecture. As of 2025, the weighted national average minimum wage exceeded ¥1,050 per hour, approaching the government’s long-standing target of a national average of ¥1,000 per hour first articulated in 2016. Sector-specific minimum wages, established through tripartite committees for specific industries, may exceed the regional rate.
Concluding Observations
Japanese labour law presents a complex interplay between formal legal rules and informal institutional arrangements. The enterprise union system, the judge-made abuse of right doctrine in dismissal, and the tripartite administrative commissions reflect a characteristically Japanese approach to labour regulation that resists easy categorisation within conventional comparative law typologies. The trend of legislative reform since the 2000s — the codification of dismissal standards, the introduction of the Labor Tribunal system, the working time reforms of 2019 — suggests a gradual movement towards formalisation and legalisation of labour relations, driven in part by the erosion of the traditional employment system and the growth of non-regular work. Whether this trajectory will continue, and whether it will adequately address the growing precariousness of the Japanese labour market, remains an open question.