The Honest Answer: 6 to 18 Months
When a foreign buyer asks how long a Japan acquisition takes, the honest answer is: a straightforward mid-market deal where everything goes smoothly takes around 6 to 9 months from a first meeting to closing. A deal with regulatory complexity, a deliberate seller, difficult due diligence findings, or FEFTA prior notification in a designated sector can easily run 12 to 18 months.
The variance comes from five main sources:
(a) Seller readiness: Japanese sellers, particularly business succession cases (jigyo shokei (事業承継)), often take longer to reach a decision to sell. The relationship-building phase before formal negotiations can add months.
(b) Regulatory filing timelines: FEFTA prior notification, Antimonopoly Act filing, and foreign investment ministry review have statutory minimum periods that cannot be accelerated.
(c) Due diligence complexity: Companies with multiple licences, complex supply chains, or historical compliance issues require more time.
(d) Deal structure: A share purchase is generally faster than a business transfer or corporate split (kaisha bunkatsu (会社分割)); see Japan Corporate Split Guide.
(e) Counterparty dynamics: Owner-operated businesses often have a single decision-maker whose pace governs the process.
This guide walks through each phase, explains what drives the timeline, and flags the most common causes of delay.
Phase 1: Deal Origination and Initial Contact
Typical duration: 1 to 6 months (or longer for proactive sourcing)
Deal origination in Japan takes longer than many foreign buyers expect. Japan's M&A ecosystem is less intermediated than the US or European markets, particularly for mid-market deals below JPY 2 billion in enterprise value. Many deals come through:
(a) Introduction by a trusted intermediary (銀行, accounting firm, or business broker with an existing seller relationship)
(b) Direct outreach by the buyer to potential targets
(c) Business succession intermediaries (M&A platforms and regional banks that match aging owners with buyers)
(d) Ongoing commercial relationship with the target that evolves into an acquisition discussion
Japanese relationship norms in this phase: Japanese sellers typically need to develop a degree of trust with the buyer before they are willing to share confidential financial information. An initial meeting (face-to-face preferred) followed by several months of communication before an NDA is signed is common in owner-operated business acquisitions. Buyers who approach the process as a purely transactional exercise - requesting financial data immediately without relationship context - frequently stall here.
For deals sourced via intermediaries: The intermediary may have already screened the seller's motivations and basic financials. This can compress Phase 1 to 4 to 6 weeks once the buyer is introduced.
Phase 2: NDA and Initial Information Sharing
Typical duration: 2 to 4 weeks
Once the seller is willing to share confidential information, the non-disclosure agreement (NDA / himitsu hoji keiyaku (秘密保持契約)) is signed. This is typically a straightforward document in Japan mid-market deals; negotiation rarely extends beyond a few days. See Japan M&A NDA and LOI Guide for NDA structure and terms.
After NDA execution, the seller typically provides:
(a) Three to five years of financial statements (often Japanese GAAP accounts; note that many Japanese SMEs prepare tax accounts rather than full GAAP statements)
(b) Basic business description, customer overview, employee headcount, and key contracts
(c) Organizational chart and ownership structure
The buyer reviews this initial information to decide whether to proceed to an indicative offer.
Common delay: The seller is unprepared. Japanese SMEs often lack organized documentation of their financial and business records. If the seller has not previously engaged a financial advisor (M&A advisor / FAO) or an accounting firm to prepare the business for sale, the initial information package may be incomplete or require weeks to assemble.
Phase 3: Indicative Offer / Expression of Interest
Typical duration: 2 to 4 weeks after initial information receipt
Based on the initial information, the buyer prepares an indicative or non-binding offer letter (ikoh hyomei sho (意向表明書)). This document states:
(a) An indicative enterprise value or price range (usually based on a multiple of EBITDA or net assets, to be refined after full due diligence)
(b) The proposed deal structure (share purchase, asset purchase, or business transfer)
(c) Proposed conditions and key assumptions
(d) A request for exclusivity or a process timeline
In competitive processes (where multiple buyers have been approached), the seller may use indicative offers to select a preferred buyer for exclusive negotiations. In non-competitive processes, the indicative offer initiates the negotiation.
Japan cultural point: Indicative offers with overly aggressive conditions or price expectations significantly below what the seller was told by their intermediary create distrust that can be difficult to recover from. First offers in Japan M&A are taken more seriously as signals of counterparty intent than in some other deal markets.
Phase 4: Letter of Intent (LOI / 基本合意書)
Typical duration: 2 to 6 weeks from indicative offer
The letter of intent (LOI / kihon goishosho (基本合意書)) is negotiated and executed once both parties agree on the principal terms. It typically contains:
(a) An agreed (non-binding) purchase price or price range
(b) Binding exclusivity period for the buyer to complete due diligence and negotiate the definitive agreement - typically 60 to 120 days
(c) Binding confidentiality reaffirmation
(d) Non-binding conditions, deal structure, and indicative timeline
See Japan M&A NDA and LOI Guide for detailed LOI structure and the binding vs. non-binding mechanics.
Key negotiation point: The exclusivity period. Sellers want it short (60 days); buyers need it long enough to complete full due diligence and negotiate the definitive agreement (90 to 120 days is more realistic for complex situations). Negotiate based on the realistic due diligence timeline given what is already known about the target's complexity.
Phase 5: Due Diligence
Typical duration: 4 to 12 weeks
Full due diligence is the longest phase in most Japan M&A deals. The buyer's advisors conduct:
(a) Financial due diligence (FDD): Quality of earnings, working capital normalization, net debt analysis, and off-balance-sheet exposure. Japanese SME accounts often require significant normalization work (owner compensation adjustments, related-party transactions, personal expenses on the company).
(b) Legal due diligence (LDD): Corporate records, contracts, employment, litigation, IP, real property, and regulatory compliance. See Japan M&A Due Diligence Checklist for the full scope.
(c) Regulatory due diligence: The dimension that international buyers most commonly underweight. This covers:
- Import/export licence holdings and compliance history
- Product compliance registrations (PSE, Radio Act 技適 (giteki), PMD Act if applicable)
- FEFTA screening - is the target or its industry in a designated sector?
- Labour authority filings and compliance history
- Tax compliance history
(d) Tax due diligence: Japan corporate tax, consumption tax (JCT), withholding tax obligations, transfer pricing compliance, fixed asset tax.
(e) Environmental and property due diligence: Contamination risk at owned or leased properties.
Causes of due diligence delay:
(a) Document room preparation: Japanese sellers who have not prepared a virtual data room in advance face a significant document compilation exercise. Small and mid-size companies with paper-based records may need 3 to 4 weeks just to organize materials before the buyer's review begins.
(b) Qualified audited accounts: Many Japanese SMEs have tax accounts, not GAAP accounts. Buyers requiring GAAP-compliant financial statements may need to commission an accounting firm to prepare or convert these, adding 4 to 8 weeks.
(c) Regulatory complexity: Targets holding multiple licences in sensitive sectors (telecom, medical devices, defense-adjacent) require regulatory diligence from specialist advisors.
(d) Discovery of issues: Undisclosed tax liabilities, non-compliant employment practices, or product compliance gaps discovered in due diligence require analysis, renegotiation of price or terms, and sometimes exclusivity extension.
Phase 6: FEFTA Prior Notification (if applicable)
Typical duration: 30 business days (statutory); can extend
If the target operates in a FEFTA prior-notification designated industry under the Foreign Exchange and Foreign Trade Act (外為法), the foreign buyer must file a prior notification with the relevant ministry (typically the Bank of Japan and Ministry of Finance, with copies to the sector ministry) before closing.
The 30-business-day statutory period: After filing, the government has 30 business days to review and either clear the transaction or extend the review period. In practice:
(a) Most transactions in non-sensitive designated sectors clear within 30 days with no government intervention.
(b) Transactions involving defense-adjacent technology, semiconductor equipment, critical infrastructure, or energy may be subject to extended review (up to 5 months in exceptional cases) or modification requests.
(c) Pre-filing consultations with the ministry before formal submission can reduce the risk of a lengthy formal review.
Timing strategy: FEFTA prior notification can be filed as soon as the transaction is substantially agreed - typically at or shortly after LOI signing, rather than waiting until the definitive agreement is signed. Filing early runs the 30-day clock sooner and can prevent FEFTA from becoming the critical path item. See Japan FEFTA M&A Guide for full coverage.
Phase 7: Antimonopoly Act Filing (if applicable)
Typical duration: 30 days (Phase 1); up to 120 days (Phase 2)
If the deal meets the Antimonopoly Act (独占禁止法) notification thresholds, a prior notification to the Japan Fair Trade Commission (JFTC (公正取引委員会)) is required before closing. Thresholds: target Japan-domestic sales exceed JPY 5 billion AND acquirer group worldwide sales exceed JPY 20 billion (combined Japan market share triggers also exist).
Phase 1 review: 30 days. Most transactions clear in Phase 1 without issue.
Phase 2 review: If the JFTC requires more information, the review extends to 120 days from filing (with the possibility of further extension in exceptional circumstances).
The vast majority of foreign acquisitions of Japan SMEs do not meet the filing thresholds. Verify threshold applicability before assuming an antitrust filing is required.
JFTC filing and FEFTA notification can run concurrently. If both are required, file as soon as possible to avoid sequential delays.
Phase 8: Definitive Agreement Negotiation
Typical duration: 4 to 10 weeks (concurrent with due diligence and regulatory filings)
Negotiation of the definitive acquisition agreement (share purchase agreement / SPA / kabushiki joto keiyaku (株式譲渡契約)) typically runs in parallel with due diligence and regulatory filings rather than sequentially.
A first draft SPA is typically circulated by the buyer's counsel 2 to 4 weeks after LOI signing. Negotiation focuses on:
(a) Representations and warranties scope and qualification
(b) Indemnification caps, baskets, and time limits
(c) Conditions precedent (FEFTA, Antimonopoly Act, third-party consents)
(d) Purchase price adjustment mechanism (locked box vs. completion accounts)
(e) Post-closing covenants (non-competition, transition services)
See Japan Share Purchase Agreement Guide for detailed SPA structure and negotiation points.
Common cause of delay: Third-party consent identification. Material contracts (leases, supply agreements, key customer agreements) may contain change-of-control clauses requiring counterparty consent. Identifying these early in due diligence and commencing the consent process as soon as possible reduces closing delay.
Phase 9: Signing (契約締結)
Typically 1 to 2 days after conditions are met or staged to precede closing by a defined period
Signing is the execution of the definitive agreement. In many Japan M&A transactions, signing and closing occur simultaneously (sign-and-close structure), particularly in simpler deals where all conditions can be confirmed by the signing date.
In more complex deals or where regulatory approvals are pending at signing, there is a gap between signing (which creates binding obligations to close, subject to conditions) and closing (when consideration is paid and shares transfer).
Phase 10: Closing (クロージング)
Timing: After all conditions precedent are satisfied
Closing is the event where:
(a) The purchase price is paid by the buyer to the seller
(b) Share certificates (if any) are delivered and the shareholder registry (kabunushi meibo (株主名簿)) is updated to reflect the buyer as the new shareholder
(c) Director resignations and new director appointments take effect
(d) Agreed closing deliverables are exchanged
Post-closing registrations: Within two weeks of closing, the company's Legal Affairs Bureau registry must be updated to reflect new directors and any other changes. Bank KYC re-verification for the incoming representative director should be initiated immediately after closing.
See Japan Post-M&A Regulatory Integration for the full regulatory notification sweep required after closing.
Summary Timeline
(a) Deal origination and NDA: 1 to 8 months (varies enormously by deal source)
(b) Indicative offer and LOI: 4 to 10 weeks
(c) Due diligence: 4 to 12 weeks
(d) FEFTA prior notification (if applicable): 30 business days minimum; filed concurrently with due diligence
(e) Antimonopoly Act filing (if applicable): 30 days minimum Phase 1; filed concurrently
(f) SPA negotiation: 4 to 10 weeks; concurrent with due diligence
(g) Signing to closing: 0 to 8 weeks depending on conditions
Total from first meeting to closing: For a straightforward deal with no FEFTA complexity, no Antimonopoly Act filing, and a seller who is organized and motivated: as short as 4 to 6 months. For a deal with FEFTA prior notification in a sensitive sector, complex due diligence, and a seller who needs time: 12 to 18 months is realistic.
The Most Common Timeline Killers
(a) Seller change of mind: Japanese business owners, particularly in business succession cases, sometimes pull back from a deal after an LOI is signed. Relationship quality throughout the process matters as much as price.
(b) FEFTA sector designation surprises: A buyer who discovers late in the process that the target is in a FEFTA designated industry faces an unplanned 30-day notification period that was not budgeted into the timeline. Conduct FEFTA screening before LOI signing, not during legal due diligence.
(c) Bank account continuity issues: Post-closing, the incoming representative director may not meet the bank's current approval criteria. This can effectively freeze the company's operations for weeks. Plan for this in advance of closing.
(d) Third-party consent delays: A major customer or landlord who takes 6 to 8 weeks to grant a change-of-control consent can push closing past the exclusivity period, requiring re-negotiation with the seller.
(e) Document and records gaps: A seller with disorganized records, missing corporate minutes, or unregistered IP creates due diligence delays that compound. Experienced advisors can work around this, but it adds time.
How Aplash Can Help
Aplash advises on the Japan regulatory dimensions that drive deal timelines: FEFTA prior notification screening, Antimonopoly Act applicability, regulatory licence transfer planning, and post-closing regulatory integration. Identifying these requirements early and filing in parallel with due diligence is the most effective way to prevent regulatory matters from extending the deal timeline.
See also: Japan M&A Due Diligence Guide, Japan FEFTA M&A Guide, Japan Share Purchase Agreement Guide, and Japan Post-M&A Regulatory Integration.
This article is for informational purposes. It does not constitute legal advice. Deal timelines vary materially by transaction. Engage qualified Japan-licensed counsel and advisors for specific transactions.