Publicly listed Japanese companies are increasingly accessible to foreign strategic buyers and PE funds, but the acquisition route is governed by a distinct body of securities law that does not apply to private targets. A tender offer, known in Japanese as kokai kaitsuke, Tender Offer / TOB (公開買付), is the regulated mechanism by which a bidder makes a public offer to purchase shares directly from existing shareholders of a listed company. Understanding when a TOB is mandatory, how it runs, and how it interacts with inward foreign direct investment screening under 外為法 is essential before any approach to a listed target.
What Is a Japan Tender Offer (公開買付 / TOB)?
A kokai kaitsuke, Tender Offer / TOB (公開買付) is a public offer, made through a prescribed process regulated by the Financial Instruments and Exchange Act, "FIEA" (金融商品取引法), by which a bidder invites shareholders of a listed company to sell their shares at a stated price within a stated period. The bidder commits in advance to acquire all shares tendered, up to any stated maximum, at the fixed price. Shareholders decide individually whether to tender.
The TOB process is supervised by the Financial Services Agency (金融庁, FSA) and operates in parallel with the Tokyo Stock Exchange's disclosure rules. Unlike a private share purchase, a TOB is inherently public from the moment of announcement: the offer price, terms, and bidder identity are disclosed to the entire market simultaneously.
Japan's TOB regime is defined by three characteristics that distinguish it from public-company takeovers in other markets: the strong cultural norm of board cooperation (the "friendly TOB"), the statutory requirement for a target board opinion, and the interaction between securities law timelines and the FEFTA prior-notification window.
When a TOB Is Legally Required
The FIEA mandates a TOB in the following circumstances:
(a) Off-market accumulation above the one-third threshold. Any acquisition of shares in a listed company through off-market transactions (i.e., outside the exchange order book) that, together with shares already held, would cause the acquirer's holding to exceed one-third of the total voting rights triggers a mandatory TOB obligation. Crossing the one-third threshold off-market without a TOB is prohibited.
(b) Rapid accumulation rule. Even below one-third, acquiring shares from more than ten shareholders in an off-market transaction within any 60-day period, where the aggregate purchase exceeds 5% of total voting rights, requires a TOB. This rule is designed to prevent quiet block accumulation that bypasses public market pricing.
(c) Existing holding above one-third. Once a holder already exceeds one-third, any further acquisition of shares outside the exchange order book requires a TOB, regardless of the incremental size.
(d) Crossing two-thirds. An acquirer who already holds between one-third and two-thirds and who seeks to cross the two-thirds threshold must use a TOB for the portion that causes the threshold to be exceeded.
On-market purchases through the exchange order book are not subject to TOB rules regardless of size, but they are subject to large-shareholding reporting (大量保有報告書) requirements once 5% is crossed, with further reports on each 1% change.
The TOB Process Step by Step
A TOB involves a defined sequence of regulated events under the FIEA:
(a) Pre-announcement preparation. The bidder conducts preliminary due diligence, typically through public information and, where the target's board cooperates, a limited non-public data room under a confidentiality agreement. The bidder and its advisors prepare the TOB registration statement (公開買付届出書) in advance. Pricing, funding arrangements, conditions, and the minimum acceptance level are fixed before announcement.
(b) Public announcement. The bidder publicly announces the launch of the TOB before the opening of the exchange on the announcement date. Announcement triggers immediate market disclosure obligations: the offer price, the acceptance period, the maximum and minimum acquisition quantities, and the settlement mechanism are all published.
(c) FSA filing. On the same day as announcement, the bidder files the TOB registration statement (公開買付届出書) with the FSA. The statement becomes publicly available and is posted on the Electronic Disclosure for Investors' NETwork (EDINET). The statement must be materially complete as filed; material amendments require re-filing.
(d) Offer period. The statutory minimum offer period is 20 business days; the maximum is 60 business days. During this period, target shareholders review the offer and decide whether to tender through their securities accounts. The target board is required to publish its opinion statement (意見表明書) within a defined period after the bidder's registration statement is filed.
(e) Settlement. After the offer period closes, the bidder counts tendered shares. If a minimum acceptance condition is included and not met, the bidder may withdraw. If conditions are satisfied, settlement occurs within the statutory settlement period, typically 3 business days after the close of the offer period.
(f) Post-TOB compulsory acquisition. Where the bidder has acquired more than two-thirds but less than 100% of shares, it may use statutory squeeze-out mechanisms to acquire the remaining minority (see the section on achieving 100% ownership below).
FEFTA Pre-Notification Requirement
Foreign acquirers of shares in Japanese companies operating in designated industries must file a prior-notification (事前届出) under 外為法 before completing the acquisition. This requirement applies to TOB transactions in exactly the same way as to private share acquisitions. The interaction between FEFTA timing and TOB mechanics requires careful management.
The FEFTA prior-notification review window is a statutory 30 days from acceptance of the filing by the Bank of Japan, though in practice it can extend to several months in complex cases. Importantly, the FIEA does not permit a bidder to announce a TOB subject to a condition that FEFTA approval has not yet been received; the TOB regulatory framework and the FEFTA notification framework must be sequenced so that FEFTA clearance is obtained or the notification period has passed without objection before or at the time the TOB settles.
The silent period risk is the practical exposure created by this sequencing requirement. If a foreign bidder files FEFTA pre-notification and that filing becomes public before the bidder is ready to announce the TOB, the target's share price may move on speculation, potentially forcing an unplanned announcement or allowing a competing bidder to emerge. The standard practice is to coordinate FEFTA filing and TOB announcement timing closely, typically filing FEFTA pre-notification at or immediately before TOB announcement, with the offer period structured to allow the FEFTA review window to run concurrently.
Foreign bidders should treat FEFTA pre-notification as a parallel workstream, not a post-announcement administrative step. Aplash provides FEFTA inbound screening assessments to determine designated-sector classification and advise on filing strategy before deal announcement. This workstream requires Director review.
Pricing Rules: Fair Price Determination
The FIEA does not prescribe a single formula for the offer price, but it imposes constraints designed to ensure that all shareholders receive equal treatment:
(a) Uniform price. A TOB must offer a single price to all shareholders for shares of the same class. The "no favored purchaser" principle means that if the bidder has bought shares from any seller at a higher price within a defined period before or during the TOB, the offer price must be adjusted upward to match the highest pre-TOB price paid.
(b) Premium over market. While not legally mandated, a premium to the pre-announcement market price is commercially necessary in virtually all cases to induce shareholders to tender. A premium reflecting the undisturbed market price is common in Japan TOB transactions, though the exact range reflects market practice, not a regulatory requirement.
(c) Independent valuation. The target company is expected to obtain an independent fairness opinion or valuation analysis to support its board's opinion on the offer price. The bidder may also obtain a valuation to justify its pricing in the TOB registration statement.
(d) Price during offer period. If the bidder acquires shares in the market at a price higher than the TOB price during the offer period, the TOB price must be raised to match.
Financial valuation analysis is outside Aplash scope and is handled by investment banking and accounting firm partners. Aplash's role in pricing is the regulatory framing: FEFTA interaction, structure-driven constraints, and FIEA compliance.
Board Approval and Target Company Response
Under the FIEA, the target company's board must publish a formal opinion statement, known as the iken hyomei-sho, Board Opinion Statement (意見表明書), within a set period after the bidder's registration statement is filed. The opinion must state whether the board recommends acceptance, recommends rejection, or is unable to express an opinion, with supporting reasons.
Japan's strong cultural norm is the "friendly TOB." In practice, the overwhelming majority of large TOB transactions in Japan proceed with the prior agreement and recommendation of the target's board. A board recommendation is operationally important: it signals to institutional shareholders and the target's management and employees that the transaction is supported, reduces deal uncertainty, and typically results in higher tender rates.
The risk of an adverse board opinion is not purely procedural. A target board that recommends shareholders reject the offer significantly reduces the probability of the TOB succeeding, as institutional investors and trust banks managing large cross-shareholdings will frequently follow the board's recommendation. A hostile TOB (i.e., one launched without board cooperation or against a board recommendation to reject) is legally permissible under the FIEA but carries materially higher execution risk and may trigger defensive measures.
The target's board may also adopt a "neutral" opinion, leaving the decision entirely to shareholders. This is more common in PE-led transactions where the board has no substantive objection but wishes to be seen as neutral on price adequacy.
Achieving 100% Ownership After a Partial TOB
A TOB that succeeds but does not result in 100% acceptance leaves a minority shareholder tail that must be eliminated if the bidder requires full ownership. The Companies Act (会社法) provides two principal mechanisms:
(a) tokubetsu shihai kabunushi no kabushiki-to uridashi seikyu, Controlling Shareholder Share Demand, "squeeze-out" (特別支配株主の株式等売渡請求). A shareholder holding 90% or more of the total voting rights in a company may compulsorily require all remaining shareholders to sell their shares at a cash price. This is the fastest and most commonly used post-TOB squeeze-out route. The procedure requires board approval of the demand and advance notice to minority shareholders, who have a right to apply to a court to determine the price if they consider it inadequate. The Companies Act does not require a separate shareholder meeting for this mechanism, which substantially shortens the timeline.
(b) Share consolidation (株式の併合, kabushiki no heigo) combined with a general shareholders' meeting. Where the bidder holds two-thirds or more but less than 90%, a share consolidation approved at a special shareholders' meeting (requiring two-thirds approval of voting rights present) can result in fractional shares for minority holders, which the company then purchases. This route takes longer because it requires a shareholders' meeting and a defined notice period.
(c) Absorption merger (吸収合併). The listed target is merged into a wholly owned subsidiary or directly into the bidder's Japan entity, with minority shareholders receiving cash as consideration. Merger requires a special shareholders' meeting (two-thirds approval).
For most foreign buyers, the optimal path is to structure the TOB to achieve 90% acceptance as a minimum condition, which unlocks the 特別支配株主 squeeze-out and avoids the need for a shareholder meeting in the final squeeze-out step.
Key Differences vs. Private M&A
Acquiring a listed Japanese company through a TOB differs from a private acquisition in several important respects:
(a) Disclosure obligations. Every material step in a TOB is publicly disclosed: announcement, registration statement, target board opinion, amendment filings, and settlement results. There is no confidential execution phase equivalent to a private share purchase agreement signing.
(b) Employee and market sensitivity. The moment of public announcement simultaneously informs the target's employees, customers, suppliers, and competitors. Managing stakeholder communications on day one is a distinct workstream that does not exist in private M&A.
(c) FSA oversight. The FSA actively reviews the TOB registration statement and has the authority to require corrections or additional disclosure before or during the offer period.
(d) Compressed operational due diligence window. In a TOB, the offer terms are fixed at announcement. The bidder must complete its diligence and fix pricing before the announcement date, based primarily on public information and any limited pre-announcement information sharing the target permits.
(e) JFTC pre-merger notification. If the combined entity's turnover meets the thresholds under the Antimonopoly Act (独占禁止法), an advance notification to the Japan Fair Trade Commission is required.
Typical Timeline and Cost Benchmarks
The following reflects general market parameters. Actual timelines depend heavily on FEFTA review complexity, target board cooperation, and FSA comment cycles. These figures are informational only.
(a) Pre-announcement preparation: 2 to 4 months for due diligence, pricing, FEFTA pre-filing assessment, and legal documentation.
(b) FEFTA prior-notification review: 30 days statutory minimum; 3 to 5 months in complex cases involving designated core infrastructure targets.
(c) Offer period: 20 to 60 business days (approximately 4 to 12 calendar weeks).
(d) Settlement: 3 business days after offer period close.
(e) Post-TOB squeeze-out (if 90% achieved): approximately 2 to 3 months for the 特別支配株主 procedure.
(f) Total elapsed time from first approach to 100% ownership: in a cooperative friendly TOB with no FEFTA complexity, a minimum of 5 to 6 months. Transactions involving designated-sector FEFTA review or phased squeeze-out should plan for 9 to 12 months.
How Aplash Can Help
Aplash provides regulatory strategy support to foreign buyers across the lifecycle of a Japan listed-company acquisition:
(a) FEFTA pre-notification assessment. Sector classification of the target, buyer eligibility analysis under the May 2025 Type-A / Type-B investor framework, and coordination of prior-notification filing strategy relative to TOB announcement timing. This workstream requires Director review.
(b) FIEA compliance framing. TOB threshold analysis, registration statement regulatory review, and advice on offer period structuring relative to squeeze-out planning.
(c) Post-TOB regulatory integration. License and permit continuity mapping across the target's existing regulatory registrations, change-of-control notification obligations, and JFTC filing coordination where applicable.
(d) Squeeze-out mechanism selection. Regulatory analysis of the appropriate post-TOB mechanism based on achieved ownership percentage and timeline requirements.
Aplash does not provide financial valuation, FA-style deal process management, or securities law opinion. Those workstreams route to investment banking and legal counsel partners. Aplash's role is the Japan regulatory strategy layer that runs in parallel with and must be sequenced against the deal process.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content.