Japan M&A: Stock Purchase vs Asset Purchase - Which Structure Is Right for Your Deal
株式譲渡 vs 事業譲渡: Choosing Between Share Transfer and Business Transfer for Japan Acquisitions in 2026
Last Updated: April 2026 · Reading Time: ~14 min
The Structure Decision That Shapes Everything Else
When acquiring a Japanese business, one of the first decisions is how to structure the transaction: buy the shares of the target company, or buy the assets and business operations directly.
This choice is called the deal structure. In Japan, the two dominant forms are:
- 株式譲渡 (kabu-shiki joto): share transfer (stock purchase). The buyer purchases the seller's equity stake. The target company itself continues to exist, with its contracts, licenses, liabilities, and history intact.
- 事業譲渡 (jigyo joto): business transfer (asset purchase). The buyer purchases specific assets and assumes specific liabilities. The selling entity continues to exist and retains what was not transferred.
Both structures are used regularly in Japan M&A. The right choice depends on what the buyer wants to acquire, what liabilities exist, the seller's tax position, and regulatory considerations specific to the target's industry.
This guide covers the key differences, the advantages and disadvantages of each, and the factors that typically determine which structure is used in practice.
Structure at a Glance
| Factor | 株式譲渡 (Share Transfer) | 事業譲渡 (Business Transfer) |
|---|---|---|
| What transfers | All shares (100% or partial stake) | Specified assets, contracts, employees, IP |
| What the buyer inherits | All assets AND all liabilities (including hidden ones) | Only the agreed-upon assets and assumed liabilities |
| Contracts and licenses | Transfer automatically with the company | Must be individually assigned (counterparty consent required) |
| Employees | Remain employed by the target (no new employment contracts needed) | Must be individually re-hired or transferred under new contracts |
| Seller tax treatment | Capital gains on share sale (often favourable) | Corporate-level tax on transfer gains + shareholder dividend tax on distribution |
| Buyer tax treatment | No step-up in asset basis (depreciation on historical book values) | Asset step-up possible (new depreciation base from purchase price) |
| Approval requirements | Board resolution (KK); sometimes shareholder approval for large stakes | Board resolution + shareholder special resolution (特別決議) required under the Companies Act |
| Speed | Generally faster | Slower: individual contract assignments, employee re-onboarding |
| FEFTA | Triggers screening if acquirer is foreign and target is in designated industry | Triggers screening if the transferred assets constitute a business in a designated sector |
Share Transfer (株式譲渡): How It Works
In a share transfer, the seller transfers ownership of their shares (or a controlling stake) to the buyer. After closing, the buyer is the new shareholder. The target company's legal existence, registered name, contracts, licenses, bank accounts, and employee relationships are unchanged.
What the buyer gets
Everything. This is the defining feature of a share transfer: the buyer steps into the seller's position as shareholder and indirectly owns everything the target company owns, including:
- All commercial contracts (client agreements, supplier agreements, leases)
- All regulatory licenses and permits (import/export registrations, product certifications, financial licenses)
- All employee employment relationships
- All bank accounts and credit facilities
- All intellectual property registered in the company's name
And all liabilities. This is the risk that drives due diligence in share deals: the buyer also inherits all existing liabilities, including:
- Tax liabilities not yet assessed
- Pending or threatened litigation
- Employment disputes
- Off-balance-sheet obligations
- Environmental liabilities (relevant for manufacturing and real property)
- Warranty or product liability exposure from past sales
Approval mechanics for a Japanese KK share transfer
For a private KK (株式会社) where share transfers are restricted by the articles (which is common for closely held companies), the board of directors must approve the transfer (会社法第136条, R2). Some articles require shareholder approval. The parties agree a share transfer agreement (株式譲渡契約書), complete transfer registration, and the seller's shares are re-registered in the buyer's name.
When share transfer is preferred
Share transfer is the dominant structure in Japan SME M&A, particularly in succession (事業承継) deals. The reasons:
- Seller tax preference. Individual sellers pay capital gains tax on share sale proceeds. At the time of writing, the rate on listed share gains is approximately 20%, and private company shares sold by an individual are taxed at a similar rate. This is materially lower than the tax cost of a business transfer (which creates corporate-level gains, then a dividend distribution to the shareholder, stacking two levels of tax).
- Continuity. The target company retains its contracts, licenses, and banking relationships. The buyer does not need to re-negotiate customer agreements or re-apply for permits.
- Speed. The transaction involves fewer moving parts than individually assigning assets and obtaining third-party consents.
Business Transfer (事業譲渡): How It Works
In a business transfer, the selling entity transfers a defined bundle of assets, contracts, IP, inventory, and employees to the buyer. The target company itself is not acquired; the buyer is acquiring what is inside it.
What the buyer gets
Only what is specified in the agreement. The buyer and seller negotiate which assets transfer, which liabilities the buyer assumes, and which remain with the seller.
What buyers typically acquire in a 事業譲渡:
- Specified equipment, inventory, and fixed assets
- Identified customer contracts and supplier contracts (with counterparty consent)
- Named employees (who must individually consent to transfer under Japan's labour law framework)
- Intellectual property (trademarks, patents, software licences)
- The business name and goodwill
What typically stays with the seller:
- Liabilities not expressly assumed
- Employees who decline to transfer
- Contracts whose counterparties do not consent to assignment
- Cash and financial instruments (unless specified)
Corporate approval requirements
A business transfer is a significant corporate action under the Companies Act (会社法 (Companies Act)). If the transfer involves a substantial portion of the company's business (会社法第467条, R2), it requires a shareholder special resolution (特別決議): approval by at least two-thirds of voting shares at a shareholders' meeting. This requirement applies to both the seller and, in some circumstances, the buyer.
Objecting minority shareholders have statutory appraisal rights (株式買取請求権) to demand that the company purchase their shares at fair value.
Employee transfer mechanics
Japan's labour law framework (労働契約法 (Labor Contract Act), L-28, R1) does not automatically transfer employment contracts in a business transfer the way UK TUPE or EU Transfer Directive rules operate. Each employee must individually consent to transfer. An employee who declines is not automatically dismissed: the seller must handle that employee under Japan's standard redundancy rules, which are demanding.
Practical implication: in a business transfer involving a workforce, the buyer must secure employee consent before or at closing. Resistance from key employees can materially affect the value of the transaction.
When business transfer is preferred
- Liability isolation. The buyer wants to acquire the operating business without inheriting undisclosed liabilities (environmental, tax, litigation). By defining precisely what transfers, the buyer limits exposure.
- Carve-out transactions. A corporate seller divesting a business unit may not own a standalone share to sell; the assets and operations are embedded in a larger entity. Business transfer is the structural mechanism for carving them out.
- Target has a damaged balance sheet. If the target KK has significant debt, accumulated losses, or disputed liabilities, the buyer may prefer to acquire only the operating assets and build a clean entity.
- Regulatory reasons. Certain licenses do not transfer automatically and must be re-applied for regardless of structure. If all key licenses need re-application anyway, the continuity advantage of a share deal disappears, and a business transfer may be equally practical.
Tax: The Most Important Structural Driver
Seller's Perspective
Share transfer: Individual sellers pay capital gains tax at approximately 20% (income tax + resident tax). This is typically the most tax-efficient outcome for owner-operators selling their company.
Corporate sellers (a Japan company selling shares of a subsidiary) pay corporate tax on the gain at approximately 23.2% plus local corporate taxes. However, the qualifying shareholding deduction (受取配当等の益金不算入) for dividends, and certain conditions under the group relief regime, may apply.
Business transfer: The target company pays corporate tax on the gain from transferring assets above book value. The seller then distributes the proceeds to shareholders, which triggers dividend withholding tax (or income tax on dividends). This double taxation is why individual sellers strongly prefer share transfers.
Buyer's Perspective
Share transfer: The buyer acquires the target at the transaction price, but for tax depreciation purposes, the assets inside the company remain at their historical book values. There is no step-up in asset basis. The buyer cannot create new depreciation deductions from the premium paid over book value (goodwill is not separately depreciable in a share deal under Japan's tax rules).
Business transfer: The buyer records the acquired assets at transaction price (fair market value). If this exceeds book value, the excess may be recognised as goodwill (のれん) for accounting purposes. Tax-deductible goodwill amortisation is available under certain conditions for qualified business acquisitions (適格事業譲渡). This can create a tax advantage for buyers over time.
📌 In practice: sellers push hard for share transfer because of the capital gains rate advantage. Buyers sometimes push for business transfer to obtain asset step-up and liability isolation. Deal structure often reflects who has more negotiating leverage.
Regulatory and Licensing Considerations
Licenses and Permits
In a share transfer, all licenses and permits held by the target company continue without re-application (because the target company itself has not changed). The buyer's identity as new shareholder does not revoke existing permits.
However, some licenses contain change-of-control provisions requiring notification or approval from the licensing authority when the ultimate owner changes. Examples include:
- Financial services licenses (金融商品取引業 (Financial Instruments and Exchange Act) licenses)
- Healthcare and pharmaceutical licenses
- Certain customs registrations
- Broadcasting and telecom licenses
In a business transfer, licenses generally do not transfer automatically. The buyer must re-apply with the relevant authority. If the license is critical to the business and re-application is uncertain or slow, this is a material deal risk.
FEFTA Screening
Both share transfer and business transfer can trigger Japan's Foreign Exchange and Foreign Trade Act (外為法 (FEFTA), L-03, R1) pre-notification requirement when the acquirer is foreign and the target operates in a designated industry (指定業種).
- Share transfer: Acquiring shares of a Japanese company in a designated industry triggers Article 26 pre-notification if the foreign buyer's post-acquisition holding reaches or exceeds the applicable threshold.
- Business transfer: Acquiring a business that constitutes a substantial operation in a designated sector may also fall within FEFTA's inward investment (対内直接投資) framework, depending on structure and sector.
FEFTA screening involves a statutory waiting period (standard: 30 days, extendable) during which the Ministry of Finance and relevant sectoral ministries review the transaction. Transactions that pose national security concerns can be modified or, in rare cases, prohibited.
⚠️ FEFTA pre-notification is a deal-timeline risk that must be assessed before signing. Closing before the waiting period expires can result in penalties. Every cross-border Japan acquisition should include a FEFTA pre-screening as part of early-stage structuring work.
Due Diligence Scope Differs by Structure
The scope of due diligence should reflect the liability exposure of the chosen structure.
In a share transfer: the buyer inherits all liabilities. Due diligence must cover the entire company history: tax assessments, employment disputes, product liability, environmental exposure, IP ownership, and all material contracts. The scope is comprehensive because the buyer has no way to leave unwanted liabilities behind after closing.
In a business transfer: due diligence can be more targeted: focused on the assets and liabilities being acquired. However, the buyer still needs to verify that:
- Key contracts are assignable and counterparties will consent
- Employees will transfer
- The identified IP is actually owned by the seller (not licensed from a third party)
- No regulatory restriction prevents the asset transfer
Representations and warranties play a different role in each structure. In a share deal, the seller gives broad warranty coverage about the company. In a business deal, the seller gives warranties about the transferred assets and assumed liabilities specifically.
Choosing the Right Structure: A Decision Framework
Work through these questions in order:
1. Is the target a standalone entity (KK or GK) whose shares are freely transferable? If yes, share transfer is the natural starting point. Proceed to question 2. If no (embedded business unit, no standalone entity), business transfer is likely the only option.
2. Are there material undisclosed liabilities the buyer wants to exclude? If liabilities can be quantified and addressed in the purchase price or through representations and indemnities, share transfer remains viable. If liabilities are unquantifiable or the buyer cannot accept them even with indemnities, business transfer for liability isolation becomes more attractive.
3. Does the target hold licenses that do not transfer in a business transfer? If yes, share transfer preserves those licenses automatically. If re-application is straightforward or the licenses are not material, business transfer remains an option.
4. What is the seller's preferred tax treatment? Individual owner-operators strongly prefer share transfer. If the seller will not accept business transfer, structure the deal accordingly and price in the liability risk through due diligence and representations.
5. Does the deal trigger FEFTA pre-notification? Both structures may trigger FEFTA. Run the FEFTA pre-screening early regardless of structure.
Summary
Share transfer (株式譲渡) is the dominant structure in Japan SME M&A. Sellers prefer it for tax reasons. Buyers accept it because Japanese target companies typically have manageable, identifiable liabilities when properly diligenced, and because license and contract continuity is commercially valuable.
Business transfer (事業譲渡) is used when the buyer needs liability isolation, the target is an embedded business unit, or the asset step-up provides meaningful tax value. It is slower, requires more counterparty consent, and raises employee transfer complexity.
In most Japan acquisition negotiations, the seller's preference for share transfer is the starting point. Buyers who need liability protection negotiate it through price, representations, indemnities, and escrow, not by insisting on a business transfer structure the seller will resist.
Both structures require professional legal and tax advice specific to the transaction. The above is an informational overview of the framework, not legal or tax advice for any specific deal.