Japan's foreign investment screening regime has tightened. Amendments to Japan's investment legislation – effective from the beginning of 2025 – expand the list of designated sensitive sectors and lower the shareholding thresholds that trigger prior notification obligations. International companies acquiring stakes in Japanese businesses now face a narrower window to act before regulatory approval becomes mandatory.
Japan's foreign investment screening rules now require prior notification for acquisitions in a significantly expanded set of sensitive industries, including technology, infrastructure, and defence supply chains. The amended investment legislation lowers the threshold at which foreign investors must file a pre-acquisition notification with the competent ministry. Non-compliant acquisitions risk being unwound or suspended pending review.
This alert identifies which business categories are affected, what the threshold criteria mean in practice, and what international companies must do immediately to avoid enforcement consequences.
What changed and when it took effect
Japan has maintained a foreign investment screening system under its core investment legislation for several decades. The 2025 amendments represent the most substantive revision in recent years. The changes took effect in early 2025 and apply to all qualifying transactions completed on or after the effective date.
Three developments define this round of amendments. First, the list of designated sensitive sectors has been expanded. Technology manufacturing, semiconductor supply, critical minerals processing, and certain digital infrastructure categories now fall within the screening perimeter. Second, the shareholding threshold that triggers prior notification has been reduced. Investors who cross even a modest equity stake in a designated-sector company must now file before completing the transaction. Third, the scope of "foreign investor" has been clarified to capture investment funds, special purpose vehicles, and holding structures – not only direct corporate acquirers.
The practical consequence is immediate. Transactions that would have cleared without prior notification under the previous rules may now require ministry approval before closing. A deal that proceeds without the required filing is subject to suspension or divestiture orders. For international companies accustomed to post-closing notification in other jurisdictions, this is a material shift.
Disclosure obligations under Japan's securities legislation have also been updated in parallel. Where an acquisition involves a listed company or a prospectus-governed securities offering, the investor may face dual filing obligations – under both investment screening rules and securities legislation governing IPO and listing requirements. Legal counsel experienced as a lawyer in Japan should map both regimes before transaction launch.
To understand how these screening rules interact with capital markets access and securities regulation, see our overview of capital markets services in Japan.
Who is affected and which thresholds apply
The amended rules apply to any foreign investor. whether a natural person, corporation, investment fund, or collective vehicle – that acquires shares or voting rights in a Japanese company operating in a designated sensitive sector. The key criteria are as follows.
- Sector designation: The acquiring target must operate in a sensitive sector. This now covers defence and dual-use equipment, cybersecurity, semiconductor and electronic components manufacturing, critical infrastructure (energy, telecoms, transport), and certain financial market infrastructure.
- Shareholding threshold: Prior notification is required when the foreign investor's stake reaches or exceeds the prescribed equity threshold, which has been lowered under the 2025 amendments. Indirect holdings through intermediate entities count toward this threshold.
- Board and management rights: Even below the equity threshold, notification may be required if the investor acquires the right to nominate directors, approve material business decisions, or access non-public technical information.
- Investment fund structures: General partners and fund managers are assessed together with limited partners in certain configurations. Structuring an acquisition through a fund does not automatically remove the notification requirement.
Exemptions remain available for passive investments meeting specific criteria – primarily where the investor has no board access, no material influence over operations, and holds below the lower exemption threshold. These exemptions are narrower than they were before the 2025 amendments. Relying on a previously applicable exemption without fresh legal analysis carries enforcement risk.
For international companies also active in Japan's banking and financial sector, the screening obligations may overlap with licensing requirements under Japan's banking and finance legislation. A coordinated review is advisable. Our team advising on banking and finance matters in Japan can support that analysis.
To receive an expert assessment of your investment structure and screening obligations in Japan, contact us at info@ferrazwhitmore.com.
Immediate actions for international companies
Companies with active or planned investment activity in Japan should take the following steps without delay.
- Audit existing holdings: Review all current stakes in Japanese companies against the updated sector list. Holdings that previously sat outside the screening perimeter may now fall within it following the sector expansion.
- Map indirect ownership: Identify all intermediate entities through which Japanese shares are held. The amended rules treat indirect holdings as equivalent to direct ownership for threshold calculation purposes.
- Pre-screen planned transactions: Any acquisition under negotiation or due diligence must be assessed under the new thresholds before signing. Filing after signing but before closing may still be possible, but proceeding to closing without clearance is prohibited.
- Assess fund structures separately: If the investment vehicle is an investment fund, the fund manager must separately evaluate whether the fund's aggregate position and governance rights trigger notification, independent of any individual limited partner's interest.
- Coordinate securities and screening filings: Where the target is a listed company or where the transaction involves a prospectus, disclosure obligations under Japan's securities legislation run concurrently. Both filing tracks must be managed on compatible timelines to avoid closing delays.
Companies that have completed acquisitions in Japan since early 2025 without a fresh screening analysis should treat that gap as a priority compliance matter. The competent ministry has indicated active enforcement intent for the expanded regime. Voluntary disclosure before a deficiency is identified by regulators typically results in a more proportionate regulatory response than reactive engagement.
Engaging a law firm in Japan with cross-border capital markets experience is the most reliable way to assess whether a transaction requires prior notification, qualifies for exemption, or needs to be restructured before proceeding. For a tailored strategy on investment screening compliance in Japan, reach out to info@ferrazwhitmore.com.
For a comparative perspective on how similar foreign investment screening changes are affecting deal activity in another high-scrutiny jurisdiction, see our alert on investment screening developments in the UAE.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our team combines Portuguese civil law expertise with English common law tradition to deliver cross-border legal solutions in foreign investment screening, capital markets access, and regulatory compliance in Japan and across the Asia-Pacific region. The firm's capital markets practice covers 15 practice areas across Europe, Asia, the Middle East, and the Americas, supported by a network of local counsel with direct experience before Japan's competent regulatory authorities. Our attorneys have advised on securities offering, IPO, listing requirements, and cross-border investment transactions across both civil law and common law systems. As an international law firm advising clients who need a lawyer in Japan with cross-border experience, we help map regulatory obligations across multiple legal regimes before a transaction proceeds. To discuss your investment screening position in Japan, 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.