Japan's corporate legislation has undergone a significant wave of amendments. These changes affect how foreign companies structure their Japanese entities, govern their boards, and manage shareholder processes. International businesses operating through a kabushiki kaisha (Japanese joint-stock company) or a branch registered in Japan must act promptly. Failure to align internal governance documents with the new requirements risks procedural invalidity of shareholder resolutions and potential regulatory scrutiny.
Japan's amended corporate legislation, effective from mid-2025, introduces mandatory governance upgrades for companies meeting certain thresholds, including enhanced board of directors composition rules and revised shareholder resolution procedures. Companies with a registered office in Japan must update their articles of association and internal governance documents to reflect the new requirements. Businesses that do not complete this process before the applicable compliance deadline face procedural risks that may affect the validity of corporate decisions.
This alert outlines what changed, which business categories are affected, and the immediate actions international companies must take.
What changed and when it takes effect
Japan's amended corporate legislation came into force in mid-2025. The reforms target three core areas of company governance: board composition and independence requirements, digital and remote shareholder resolution processes, and disclosure obligations for companies above defined thresholds.
On board composition, the amendments introduce a clearer distinction between large publicly listed companies and non-listed entities. Companies that exceed specified capital or employee thresholds must now appoint a minimum number of independent directors to the board of directors. This is not entirely new – prior legislation encouraged independence – but the revised rules make it a binding obligation with defined penalties for non-compliance.
On shareholder resolutions, the amendments formally recognise digital voting and remote participation for general meetings. Prior to this reform, the legal basis for fully digital shareholder meetings was ambiguous. Now, the legislation provides an explicit pathway, but it also imposes new procedural formalities. Resolutions passed without compliance with these formalities risk challenge on validity grounds.
On disclosure, companies above the prescribed thresholds must update their articles of association to reflect current governance practices. Where a company's articles of association predate the amendments. Those provisions that conflict with the new rules are treated as superseded. but only if the company proactively registers the updated version with the relevant commercial registry. Passive reliance on the transitional provisions does not suffice for all obligations.
For international businesses, this last point carries particular weight. A foreign parent may assume that its Japanese subsidiary's documents are current. In practice, many subsidiaries established during earlier entry phases still carry articles drafted before multiple rounds of legislative change. The 2025 amendments accelerate the need for a full governance document review. Companies that have engaged in mergers and acquisitions activity in Japan should treat document currency as a priority due diligence item.
Which companies are affected
The reforms affect the following categories of entities with a registered office in Japan:
- Listed companies on any Japanese stock exchange – immediate and full compliance required
- Large non-listed companies exceeding the capital or employee thresholds defined in corporate legislation – board composition and disclosure obligations apply
- Foreign companies operating through a Japanese subsidiary – articles of association and shareholder resolution procedures must be reviewed
- Joint ventures where a foreign entity holds a controlling or significant interest – governance alignment is required across all relevant documents
Smaller entities and branches below the defined thresholds are subject to a narrower set of obligations, principally the recognition of digital meeting procedures. However, even these entities should assess whether their existing articles of association contain provisions that conflict with the new rules.
Companies engaged in company registration in Japan during or after mid-2025 will be required to comply from the outset. There is no grace period for newly incorporated entities. For businesses considering market entry, this means that the constitutional documents prepared at incorporation must already reflect the amended requirements.
To receive an expert assessment of your Japan corporate governance exposure, contact us at info@ferrazwhitmore.com.
Immediate actions for international companies
The compliance deadline for updating registered documents varies by obligation type, but for most companies the window for completing all required steps closes within several months of the effective date. Delaying action increases the risk that a shareholder resolution passed in the interim may later be challenged on procedural grounds. The following actions should be initiated without delay.
Review articles of association. Instruct local counsel to compare the company's current articles of association against the requirements introduced by the amendments. Any conflicting or outdated provisions must be identified and flagged for amendment. This step should be completed before any general meeting is convened under the new rules.
Assess board composition. For companies above the relevant thresholds, verify whether the current board of directors meets the new independence requirements. If the board falls short, begin the process of identifying and appointing qualifying independent directors. This may require a shareholder resolution, which itself must be conducted in compliance with the revised procedural rules.
Update shareholder resolution procedures. If the company intends to use digital or remote voting at its next general meeting, confirm that its articles of association and internal regulations expressly permit this. Convening a digital meeting without a compliant constitutional basis risks the invalidity of resolutions passed at that meeting.
Register updates with the commercial registry. Amendments to articles of association become effective against third parties only upon registration. Prepare the required documentation and file with the relevant registry promptly. Practitioners working with Japan's corporate legislation consistently advise that registration delays create a gap period during which amended provisions may not be enforceable.
Audit subsidiary governance documents. Foreign parent companies should treat this reform as a trigger for a broader audit of all Japanese subsidiary governance documents. This includes shareholder agreements, board regulations, and any powers of attorney issued under the previous regime. For detailed guidance on structuring your Japanese corporate presence, visit our corporate law services for Japan.
A parallel alert covering similar governance reform dynamics in another high-growth market is available in our analysis of corporate law reforms in the UAE, which may be relevant for groups operating across both regions.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our Asia-Pacific practice supports international companies navigating Japan's corporate legislation, including company registration, articles of association updates, board of directors restructuring, and shareholder resolution compliance. As an international law firm with experience across both civil law and common law systems, we provide practical guidance for groups managing multi-jurisdictional governance obligations. Our attorneys have advised on corporate law matters across Asia-Pacific and CIS markets, supported by a network of local counsel in Tokyo and other key centres. Engaging a lawyer in Japan with cross-border experience is particularly valuable when reforms simultaneously affect governance documents, registry obligations, and group-level M&A activity. To discuss how Japan's 2025 corporate reforms affect your entity, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.