Acquiring a specific division, product line, or subsidiary from a Japanese corporate group is structurally different from buying the whole group. The seller remains in existence, employees may span multiple business units, IT infrastructure and supply contracts are shared, and regulatory licenses may be anchored to the parent entity rather than the business you are buying. This guide explains the two primary legal mechanisms for a Japan carve-out, the FEFTA (外国為替及び外国貿易法) screening implications, the labor law constraints that can reshape your deal structure, and the practical reasons why carve-outs in Japan typically take longer and cost more than equivalent clean share purchases.
Last Updated: May 2026 · Reading Time: ~13 min
What Is a Carve-Out in the Japan Context?
A carve-out acquisition in Japan means the foreign buyer is acquiring a defined portion of a Japanese parent's business, not the full corporate group. The target may be:
(a) a division with no separate legal personality, operating within the parent KK (株式会社, Kabushiki-Kaisha) or GK (合同会社, Godo-Kaisha);
(b) an existing subsidiary that the parent controls 100% or majority, where the buyer wants only that subsidiary and not the rest of the group; or
(c) a project unit or product line embedded inside a larger operating entity.
The distinction from a standard share purchase matters immediately: when you buy all shares in a subsidiary, you acquire an existing legal entity with its own contracts, employees, licenses, and liabilities. When you carve out a division, none of those elements are automatically packaged. Each category must be identified, separated, and transferred under a defined legal mechanism.
The two mechanisms that govern how a carve-out is effected under Japanese law are the jigyo-yoto, business transfer / asset purchase (事業譲渡) and the kaisha-bunkatsu (会社分割). Each has a different risk profile, a different treatment of employees, and a different effect on third-party contracts and regulatory licenses.
Mechanism 1: Business Transfer / Asset Purchase (事業譲渡)
How It Works
Under Companies Act (会社法), a 事業譲渡 is a contractual transfer of defined assets and liabilities from the seller to the buyer. It is not a universal succession. The seller remains a legal entity after closing; only the items specified in the transfer schedule move.
The buyer selects which assets to acquire: plant and equipment, intellectual property, key customer contracts, inventory, and identified goodwill. The buyer also selects which liabilities to assume. Unlisted liabilities, pending litigation, and tax exposures the buyer does not expressly accept generally stay with the seller, subject to the protections described below.
A 事業譲渡 that constitutes a "transfer of all or a substantial part of the business" (重要な財産の譲渡) requires a special resolution (特別決議) by the seller's shareholders under 会社法. The threshold is determined by the aggregate book value of the assets being transferred relative to the seller's total assets.
The Selective Liability Benefit
Because no legal entity changes hands, the buyer acquires only the liabilities it contractually accepts. Pre-transfer environmental obligations, pension underfunding, latent product liability claims from sold products, and employment-related claims from transferred employees who later raise historical grievances all sit in the seller unless the transfer agreement allocates them otherwise. Reps and warranties indemnity clauses in the transfer agreement govern residual exposure.
Note: Where the seller's trade name is continued by the buyer, 会社法 imposes successor liability on the buyer for the seller's business debts to third parties who were unaware of the exclusion. Buyers who do not intend to assume historical liabilities should either use a distinct trade name or include express debt-exclusion notices in seller-directed communications.
The Asset Transfer Consent Problem
The 事業譲渡 mechanism requires that each third-party contract be individually novated or assigned with counterparty consent. There is no operation-of-law transfer. In a business with dozens of supply contracts, service agreements, software licenses, and customer master service agreements, obtaining consent from every counterparty before closing is operationally intensive. Where counterparties withhold consent or demand renegotiation as a condition, the buyer may close without certain contracts and then operate under a transitional services arrangement until those consents are secured post-closing.
This consent requirement is the single largest structural disadvantage of the 事業譲渡 route for complex carve-outs.
Employee Transfer Under 事業譲渡
Employees do not transfer automatically under a 事業譲渡. Each employee must individually consent to becoming an employee of the buyer. An employee who refuses cannot be compelled to transfer. Under Labor Contract Act (労働契約法), a dismissal that lacks objectively reasonable grounds and social appropriateness is void. The seller cannot simply terminate employees who decline to move, and the buyer cannot force them into the new entity.
In practice, employee consent rates are generally high where:
(a) the business unit being carved out has a distinct identity and the employees identify with it rather than with the parent;
(b) the buyer communicates compensation continuity and comparable or improved working conditions; and
(c) the transition is supported by the seller's management through internal communications.
Where significant numbers of employees decline, the buyer must reassess its operating model: the carved-out business may be harder to run without its institutional staff, and the seller retains employed workers who are no longer matched to the divested unit.
Mechanism 2: Corporate Split (会社分割) and Why Foreign Buyers Prefer It
Structure
Under 会社法, a 会社分割 is a corporate restructuring mechanism in which a defined business unit (事業) is transferred from the splitting company (分割会社) to either a newly incorporated entity (新設分割, shinsetsu-bunkatsu, incorporation-type split) or an existing entity (吸収分割, kyushu-bunkatsu, absorption-type split).
For a foreign buyer acquiring a Japanese business unit, the preferred route is almost always the absorption-type corporate split (吸収分割): the seller's parent splits the target business unit into a new or existing subsidiary, which the buyer then acquires by share purchase. The sequence is:
(a) Seller and buyer agree on deal terms; buyer conducts due diligence on the target business unit.
(b) Seller prepares and executes an absorption-type corporate split plan (吸収分割契約), transferring the target business unit into a new KK (NewCo) or an existing dedicated entity.
(c) The split takes effect on a registered effective date filed with the Legal Affairs Bureau (法務局, Homusho).
(d) Buyer acquires all shares in NewCo by share purchase agreement.
The buyer is purchasing shares in a company that came into existence fully constituted with the target assets, contracts, employees, and liabilities already inside it.
Why 吸収分割 Is Often Preferred
First: universal succession for contracts. In an absorption-type corporate split, contracts, rights, and obligations assigned to the business unit in the split plan transfer to NewCo by operation of law, without requiring counterparty consent (unless the specific contract contains an anti-assignment clause triggered by a 会社分割). This eliminates the contract-by-contract consent bottleneck that makes a 事業譲渡 slow on deals with complex supply chains.
Important caveat: many commercial contracts drafted after M&A became common in Japan include change-of-control and anti-assignment language specifically covering 会社分割 events. The due diligence process must review each material contract for this language. Where an anti-assignment clause covers 会社分割, the contract does not transfer without consent and the carve-out plan must account for this exception.
Second: employment transfers automatically. Under the Act on Succession of Labor Contracts upon Company Split (会社分割に伴う労働契約の承継等に関する法律, commonly referred to as the 労働契約承継法), employees who are primarily engaged in the business unit being split transfer to NewCo automatically upon the effective date, without requiring individual consent. Employees who are only partially engaged in the target business unit have a right to object; the procedures for notification, consultation, and objection handling are specified in the statute and in associated MHLW guidelines.
This automatic transfer mechanism is a material structural advantage over the 事業譲渡, particularly for deals where the workforce is large or dispersed across multiple locations, and where individual consent collection would create closing uncertainty.
Third: regulatory licenses may follow. Whether licenses and permits transfer depends on the authorizing statute. Some licenses are attached to the legal entity (法人格) and do not move; they must be reapplied for by NewCo after the split. Others are attached to the business unit or to an approved facility, and regulators have accepted that a 会社分割 can carry them. The regulatory license analysis is deal-specific and is addressed in detail below.
The Liability Exposure Difference
The 会社分割 involves universal succession for the items specified in the split plan, which means pre-split liabilities allocated to the business unit follow into NewCo. There is no equivalent of the 事業譲渡 liability-exclusion flexibility. Buyers acquiring through a share purchase of NewCo post-split take the liabilities that went into NewCo as part of the split plan.
Two protective mechanisms exist:
(a) Careful drafting of the split plan by the seller to exclude or retain specific legacy liabilities. This requires negotiation and a clear indemnification structure in the acquisition agreement for items retained by the seller.
(b) The post-split share purchase agreement's reps and warranties and indemnification provisions, which form the primary contractual backstop.
Representations and warranties (表明保証) insurance (表明保証保険) is increasingly available in Japan for carve-out transactions, though capacity for complex carve-outs remains more limited than for clean share purchases.
FEFTA Implications for Carve-Out Transactions
When FEFTA Screening Is Triggered
外為法 (外国為替及び外国貿易法, FEFTA) governs inward foreign direct investment screening in Japan. Under 外為法第26条, a foreign investor must file prior notification (事前届出) before completing an acquisition when:
(a) the target business operates in a designated sensitive sector (安全保障上重要な事業分野), including but not limited to defense, semiconductors, cybersecurity, critical infrastructure, telecommunications, pharmaceuticals, and related sectors designated by Cabinet Order; and
(b) the acquisition results in crossing a prescribed shareholding threshold, or constitutes a bulk acquisition act (大量取得行為), including the acquisition of 1% or more of shares in a listed company in certain regulated sectors.
For carve-outs specifically, FEFTA screening implications arise in two ways:
Scenario A: the buyer acquires shares in NewCo post-split. Where NewCo inherits a business in a designated sensitive sector, the share acquisition triggers prior notification under 外為法第26条, regardless of whether NewCo is newly incorporated. The test is whether the business activity of the entity falls within a designated sector, not whether the entity has a prior investment history.
Scenario B: the acquisition is structured as a 事業譲渡. An asset purchase that does not involve share acquisition does not directly trigger FEFTA inward investment screening. However, where the acquired assets include controlled technology or the business is defense-adjacent, separate export/technology transfer controls under 外為法 may apply to the transfer of technical know-how embedded in the assets.
The May 2025 FEFTA Amendment
Effective May 19, 2025, METI amended the Foreign Exchange Order (外国為替令) and related ministerial ordinances. The amendment expanded the definition of Designated Foreign Investor (特定外国投資家) to capture investment vehicles that are bound by contract or foreign law to cooperate with foreign government intelligence-collection activities. Investment vehicles nominally based in Cayman Islands, Singapore, or Hong Kong that carry such obligations are now within scope.
For PE funds and corporate acquirers, this means: fund structure and LP/investor composition must be assessed at the FEFTA screening stage, not just the operating entity's nationality. A Cayman-domiciled fund with a particular LP structure may now trigger prior notification requirements that would not have applied under the pre-2025 framework.
Escalation note: If your carve-out involves a business in defense, nuclear, explosives, firearms, semiconductors for defense applications, or a combination of three or more ministries' regulatory regimes, FEFTA pre-notification is likely required and the analysis requires Director review before any commitment is made to the seller. Contact Aplash before signing an LOI in these sectors.
JFTC Pre-Merger Notification
Where the combined domestic turnover of the buyer group and the target business unit exceeds the thresholds under the Antimonopoly Act (独占禁止法), a pre-merger notification to the Japan Fair Trade Commission (公正取引委員会) is required. Carve-outs are not exempt. The relevant turnover for the target in a carve-out is the turnover attributable to the specific business unit, not the parent group as a whole. This can create structuring considerations: where the carved-out unit's Japan revenue is below threshold and the group's Japan revenue is above it, careful documentation of the perimeter matters for JFTC filing analysis.
Due Diligence for Japan Carve-Outs
Carve-out due diligence is more complex than due diligence for a clean share purchase because the perimeter of what is being acquired must be constructed during due diligence, not simply reviewed.
Shared Services Unwind
Most Japanese corporate groups operate with centralized shared services covering IT infrastructure, HR administration, payroll, accounting, legal, procurement, and facilities management. The carved-out business unit has been consuming these services at allocated cost rather than paying market rates for standalone equivalents.
Due diligence must map:
(a) which shared services the carved-out unit currently consumes, at what volume, and at what internal transfer cost;
(b) which of those services can be replicated standalone by the buyer from day one;
(c) which require a transitional services agreement (TSA, described below) to bridge until standalone replacement is in place; and
(d) the true standalone cost to the buyer of each service once the parent's group subsidy is removed.
The standalone cost gap is frequently the largest financial surprise in a Japan carve-out. Internal transfer prices within Japanese corporate groups are often below market, and the seller's historical management accounts for the business unit will not reflect this. Buyers must reconstruct a standalone P&L based on actual market service costs before forming a valuation view.
IP Ownership Mapping
Intellectual property in Japanese corporate groups is commonly held centrally by the parent rather than by the operating business unit. Patents, trademarks, trade secrets, software, and know-how may be licensed to the business unit under informal or undocumented intra-group arrangements.
Due diligence must identify:
(a) which IP is registered in the parent's name (and whether the split plan addresses transfer to NewCo or whether a separate IP assignment is required);
(b) which IP is licensed from third parties under agreements held by the parent (and whether the license follows the split or requires counterparty consent);
(c) which IP was developed by employees of the business unit but vested in the parent under Japanese employment law (知的財産権の帰属); and
(d) whether any IP is shared with other business units of the parent that are not being sold (in which case the buyer cannot receive an exclusive assignment without leaving the seller's other businesses exposed).
Japanese employment law presumes that inventions made by employees in the course of their duties belong to the employer (職務発明), subject to compensation payment requirements. This means IP created by the carved-out unit's staff is presumed to sit with the corporate entity that employs them, which for divisions embedded in the parent is the parent itself.
Employee Identification and Ring-Fencing
In a division carve-out, employees frequently perform functions that benefit multiple business lines. A finance manager may support both the target division and other retained businesses. An engineer may split time across product lines. Due diligence must produce a definitive employee list that:
(a) identifies full-time employees dedicated to the target business unit (who transfer automatically in a 会社分割 or require consent in a 事業譲渡);
(b) identifies partial employees with split responsibilities (who have objection rights in a 会社分割 and require negotiated transfer arrangements in a 事業譲渡);
(c) identifies employees retained by the seller who support the target business unit and whose services must be covered by TSA arrangements post-closing; and
(d) flags any employees with special status: union representatives (組合員), employees on statutory leave (育児休業, 介護休業), and employees in the middle of disciplinary procedures.
Regulatory License Mapping
This is one of the most transaction-specific components of a Japan carve-out and must be addressed with precision.
Licenses That Stay With the Seller Entity
Some licenses are personal to the legal entity that obtained them and do not transfer in any corporate split. Examples include:
(a) import/export licenses granted to a named entity under trade control laws;
(b) financial instruments business registrations under 金融商品取引法;
(c) certain telecommunications business registrations under the Telecommunications Business Act (電気通信事業法); and
(d) pharmaceutical manufacturing/marketing approvals (承認) held by the parent under the PMD Act (薬機法).
Where the target business depends on such licenses and they cannot transfer, NewCo must apply for its own licenses after the split. This creates a regulatory gap period during which the business may not legally operate in full. Deal structure must account for this gap: closing conditions, seller transitional license arrangements, or pre-split licensing steps are the available tools.
Licenses That May Follow the Business Unit
Some regulatory frameworks allow or expressly provide for license succession on a 会社分割:
(a) Construction licenses (建設業許可) under the Construction Business Act (建設業法): MLIT has acknowledged that licenses can transfer on a 会社分割 with prior notification to the relevant authority, subject to successor entity meeting license qualification requirements.
(b) Real estate transaction licenses (宅地建物取引業免許) under the Real Estate Transaction Business Act (宅地建物取引業法): similar notification-and-succession framework.
(c) Product approvals and facility registrations in some sectors follow the facility rather than the entity, making them transferable if the physical facility is included in the split.
In each case, the buyer should not assume transfer; verification with the licensing authority before signing the split plan is required.
Regulatory Gap Risk
Where key licenses cannot transfer, the seller and buyer must negotiate either:
(a) a post-closing sub-contracting or licensing-back arrangement under which the seller's entity continues to hold the license and provides the regulated service to NewCo during the application period; or
(b) a regulatory closing condition (先行条件) requiring NewCo to obtain its own license before the share acquisition closes.
Option (a) is more common in Japan because regulatory timelines are often uncertain. Option (b) creates deal uncertainty where regulatory authority timelines cannot be contractually controlled.
Transition Service Agreements in Japan
What a TSA Covers
A Transition Services Agreement (TSA, 移行期間業務委託契約) is a post-closing services contract under which the seller provides defined services to the buyer for a fixed period while the buyer builds standalone capability. Typical services covered include: IT systems access, payroll processing, accounting consolidation, HR administration, procurement via parent contracts, facilities management, and technical support.
Why Japan TSAs Are Harder to Enforce Than in Western Deals
Several structural features of Japanese corporate relationships make TSA enforcement more difficult than in US or European carve-outs:
First: relationship dependency. Japanese corporate service relationships are typically governed by informal internal service-level norms rather than documented KPIs. The seller's employees who provide TSA services are still employed by the seller and serving its internal priorities alongside the contractual TSA obligation. Where seller management attention shifts post-closing, service quality degrades in ways that are difficult to evidence as a breach.
Second: limited liability culture in commercial contracts. Japanese commercial contracts typically cap consequential damages and operate on mutual expectation of goodwill adjustment rather than penalty enforcement. A foreign buyer expecting Western-style SLA credits and termination-for-cause remedies will find that Japan courts apply Civil Code (民法) good-faith principles that may narrow the buyer's available remedies against a seller-provider whose service has degraded but not technically breached.
Third: IT systems integration. Many carved-out business units operate on parent group ERP systems (SAP, Oracle, or domestic Japanese ERP platforms) under enterprise licenses held by the parent. The TSA must address: read/write access for NewCo users, data segregation, data migration timelines, and licensing sub-arrangements. Japanese enterprise software vendors have varying policies on license sub-use for carve-out transitions; confirm with each major vendor before finalizing TSA terms.
Typical TSA Duration in Japan
TSA durations for Japan carve-outs typically run:
(a) 6 to 12 months for smaller carve-outs with limited shared services dependency;
(b) 12 to 24 months for mid-size carve-outs with complex IT or regulatory transitions; and
(c) 24 to 36 months in cases involving pharmaceutical, financial, or heavily regulated operations where regulatory re-licensing timelines drive the overall transition.
Extensions are common. Build extension rights and clear pricing for extended service periods into the TSA before signing.
Labor Considerations in Detail
労働契約承継法: Transfer of Employment in 会社分割
The 会社分割に伴う労働契約の承継等に関する法律 (Act on Succession of Labor Contracts upon Company Split, 労働契約承継法) applies specifically to 会社分割 transactions and is administered under MHLW guidance. Its core provisions establish:
(a) employees primarily engaged in the business unit being split transfer to NewCo automatically on the effective date of the split, without requiring their individual consent;
(b) employees who are partially engaged in the target business unit have the right to object to the transfer (or to the non-transfer, if they wish to move but the split plan does not include them) within a specified notification period;
(c) the splitting company must notify affected employees of the split plan contents and the expected impact on their working conditions within a prescribed timeline before the effective date;
(d) consultation with labor unions (労働組合) or employee representatives (過半数代表者) is required before the split is registered.
Failure to follow the notification and consultation procedures does not necessarily invalidate the split, but creates exposure to individual employment claims and potential labor authority involvement. Buyers should review seller compliance with these procedures as part of due diligence.
Individual Consent Requirement Under 事業譲渡
By contrast, under a 事業譲渡, no statutory transfer mechanism exists. Employees must be offered employment by the buyer and individually accept. Each employee enters a new employment contract with the buyer. The key labor law implications:
(a) Continuity of service (勤続年数): Japanese law does not mandate that prior service years carry over in a 事業譲渡, but failure to recognize continuity affects severance calculation, annual paid leave accrual, and retirement benefit entitlements. Buyers who offer continuity recognition (通算) signal commitment to workforce stability; buyers who do not should model the cost differential.
(b) Terms and conditions: the buyer is not legally obligated to replicate identical employment terms. However, materially inferior terms create consent risk: employees compare total compensation, not just base salary. Under the Labor Standards Act (労働基準法), any unilateral change to terms that disadvantage employees requires legal justification; changes agreed with individual employees or through collective bargaining are on firmer ground.
(c) Seller's retained obligation: the seller cannot dismiss employees who declined to transfer simply because the business unit was sold. The four requirements for lawful mass dismissal (整理解雇の4要件) established through case law and codified in 労働契約法第16条 require the seller to demonstrate genuine business necessity, exhaustion of alternatives, rational selection criteria, and appropriate procedure before any dismissal. Sellers who expect to shed non-transferring employees without meeting these requirements face void dismissal claims.
Timeline and Cost Premium vs. a Clean Share Purchase
Deal Timeline
A clean share purchase of an existing Japanese subsidiary typically closes in three to six months from signing of an LOI, assuming no FEFTA review and limited regulatory conditions. The buyer acquires an already-constituted entity.
A Japan carve-out transaction has several additional phases:
(a) Perimeter definition and financial carve-out: preparing standalone financials for the target business unit from the parent's consolidated accounts takes one to three months and requires cooperation from the seller's finance and accounting teams.
(b) Corporate split execution (for 会社分割): registering the split plan, complying with the 労働契約承継法 notification and consultation obligations, and filing the split with the Legal Affairs Bureau adds two to four months to the pre-closing timeline.
(c) Regulatory license analysis and pre-licensing: where licenses must be obtained for NewCo before closing, regulatory authority timelines (typically two to six months per license, potentially longer for health and financial licenses) may extend the overall timeline materially.
(d) TSA negotiation: TSA terms are often the most heavily negotiated element of a carve-out, sometimes taking as long as the main acquisition agreement to finalize.
Realistic total timeline from LOI to close for a mid-complexity Japan carve-out: 9 to 18 months. Complex regulatory re-licensing scenarios can extend this further.
Cost Premium
Compared to a clean share purchase, a Japan carve-out involves additional advisory costs for:
(a) financial carve-out accounting (standalone P&L construction), typically involving the Japan Big Four accounting firms;
(b) labor law advice on the 労働契約承継法 notification procedures and employment contract design;
(c) regulatory license mapping and re-application advisory across each applicable ministry;
(d) IT separation planning and TSA IT annex negotiation; and
(e) extended due diligence scope covering shared services, IP mapping, and perimeter definition.
Advisory fees for a mid-complexity Japan carve-out are typically 20% to 40% higher than for a comparable clean share purchase, exclusive of the regulatory re-licensing application costs themselves.
Choosing Between 事業譲渡 and 会社分割
The choice between mechanisms is not purely legal; it is driven by the facts of the specific deal. As a practical guide:
事業譲渡 is better suited when:
(a) the target is a small, clean business unit with few contracts and employees;
(b) the buyer wants maximum flexibility to select assets and exclude liabilities;
(c) the buyer has pre-agreed consent from all key counterparties (or can obtain it readily); and
(d) the seller's board does not want the procedural overhead of a formal corporate split registration.
吸収分割 is better suited when:
(a) the business unit is large or has a complex contract base where individual consent collection is impractical;
(b) the workforce is large and employee consent uncertainty would create closing risk;
(c) the business has ongoing regulatory relationships that benefit from entity-level continuity; and
(d) the buyer is acquiring NewCo via a subsequent share purchase and wants the target delivered as a clean subsidiary.
In practice, the majority of significant Japan carve-outs involving foreign buyers use the 吸収分割 followed by share purchase route, precisely because it resolves the contract transfer and employee consent problems that make a 事業譲渡 slow and uncertain at scale.
Conclusion
Japan carve-outs are executable, but they require structural planning from the start of the deal process. The choice between 事業譲渡 and 吸収分割 determines how employees, contracts, and licenses behave at closing. FEFTA screening must be assessed early, including under the expanded May 2025 framework, because prior notification to the Ministry of Finance and METI can add months to the timeline in regulated sectors. The TSA is not a detail to be negotiated after signing: it governs operational continuity and must be as carefully drafted as the acquisition agreement itself.
Foreign buyers who approach Japan carve-outs with the same assumptions they bring to asset purchases in other markets consistently underestimate timeline, standalone cost, and labor complexity. Engaging regulatory strategy support before structuring decisions are locked in avoids the most common and costly missteps.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content. Last updated: May 2026.