The Seal System Is Not Optional
Japan's corporate seal system (hojin inkan seido (法人印鑑制度)) is not a cultural formality. It is a legally recognized authentication mechanism embedded in banking, contract execution, real estate, import/export, and government filings.
For a foreign-owned Japanese company, understanding the seal system is operational necessity. A company that loses its representative director seal, cannot locate its bank seal, or confuses which seal to use on a government form faces real disruptions: contracts that cannot be executed, bank transactions that cannot be authorized, and filings that are returned for correction.
This guide explains the types of corporate seals, their legal significance, registration requirements, and how to manage them in practice.
The Three Core Corporate Seals
Japanese companies typically maintain three distinct seals. Each has a different function and different legal weight.
1. Representative Director Seal (法人代表印 / 丸印)
The hojin daihyo in (法人代表印), also called the maruinin, literally "round seal" (丸印), is the company's primary seal.
Legal status: This seal is registered with the Legal Affairs Bureau (法務局 (homusho)). Registration creates a certified record. Anyone can request a Seal Registration Certificate (inkan shomeisho (印鑑証明書)) from the Legal Affairs Bureau, which confirms that the seal on the certificate matches the company's registered seal. This certificate is used to authenticate the company's identity in high-stakes transactions.
Usage: The 法人代表印 is used to execute:
(a) Material contracts (real estate leases, loan agreements, major commercial agreements)
(b) Articles of Incorporation (定款) at incorporation and amendments
(c) Legal Affairs Bureau filings (director registration, address changes, capital increases)
(d) Board resolutions and shareholder meeting minutes where external authentication is required
(e) Documents submitted to courts, notaries, and government agencies requiring proof of corporate identity
Physical design: Round shape; outer ring contains the company name, inner area contains the characters for KK (代表取締役印) or for GK (代表社員印). Standard diameter is 18mm or 21mm.
Custody: The representative director seal must be in the physical custody of the representative director or secured under the representative director's direct control. It should never be handed over to third parties without a specific, authorized purpose. Loss of this seal requires immediate cancellation of the existing registration and registration of a new seal, with notification to all counterparties who hold Seal Registration Certificates referencing the old seal.
2. Bank Seal (銀行印 / 銀行用印鑑)
The ginko in (銀行印) is the seal registered with the company's bank(s) for the purpose of authorizing bank transactions.
Legal status: The 銀行印 is not registered with the Legal Affairs Bureau. It is registered separately with each bank where the company holds an account. The bank uses its registered copy to authenticate withdrawal instructions, wire transfer instructions, check issuance, and other banking authorizations.
Usage: The 銀行印 appears on:
(a) Bank account mandate documents
(b) Checks (手形 (tegata)) and promissory notes
(c) Wire transfer instructions submitted on paper to the bank
(d) Account opening and maintenance documents
Separation from representative director seal: The bank seal is deliberately kept separate from the representative director seal. Using the same seal for both purposes is not prohibited, but most companies maintain separate seals as an internal control measure. If the representative director seal is used for a bank transaction in error, the bank may reject it because it is not the registered bank seal.
Physical design: Typically round, slightly smaller than the representative director seal (15mm or 16.5mm). Contains the company name.
3. General Company Seal (角印 / 社判)
The kakuin, literally "square seal" (角印) is the company's general-purpose seal for everyday commercial documents.
Legal status: The 角印 is not registered with any government authority. It is not a legally required seal. Its value is as a practical identifier of the company on routine documents.
Usage: The 角印 appears on:
(a) Invoices (請求書 (seikyusho))
(b) Quotations (mitsumori sho (見積書))
(c) Delivery notes (nohin sho (納品書))
(d) Purchase orders (hacchu sho (発注書))
(e) Receipts (領収書 (ryoshusho))
(f) Internal documents and routine correspondence
Physical design: Square shape, typically 21mm x 21mm. Contains the company name; the no in (之印) characters are sometimes added.
Seal Registration at the Legal Affairs Bureau
What must be registered
Only the representative director seal (法人代表印) requires registration with the Legal Affairs Bureau. Registration is mandatory at incorporation: the seal must be registered when the incorporation filing is submitted.
Registration process
(a) Order the seal from a seal-maker (判子屋 / はんこや) before the incorporation filing date. Delivery typically takes 3 to 10 business days depending on the material (ebony, titanium, horn, acrylic) and urgency.
(b) Submit the Seal Registration Application (inkan todokesho (印鑑届書)) together with the incorporation application at the Legal Affairs Bureau.
(c) The Legal Affairs Bureau records the seal impression and issues a registered entry. From this point, the company can obtain Seal Registration Certificates.
Seal Registration Certificate (印鑑証明書)
A Seal Registration Certificate (inkan shomeisho (印鑑証明書)) is an official certificate issued by the Legal Affairs Bureau confirming that a specific seal impression matches the registered seal of the company.
How to obtain: Apply at the relevant Legal Affairs Bureau with the company's registration number. Certificates can also be obtained at convenience stores via the My Number Card system or through online procedures. Fee: approximately ¥450 per copy.
Validity: The certificate itself does not have an expiry date, but counterparties typically require a certificate issued within 3 months of the relevant transaction. Request fresh certificates for each significant transaction.
Usage context: When a company executes a major contract, applies for a bank account, registers real property, or files with a court, the counterparty or authority will often require a Seal Registration Certificate to verify that the seal on the document is the company's registered seal. This is the authentication mechanism that gives the registered seal its legal weight.
Changing the Representative Director: Seal Implications
When a company's representative director changes, the seal registration situation requires careful management.
What must happen
(a) Cancel the outgoing director's seal registration. File a Seal Registration Cancellation Application (印鑑廃止届書) at the Legal Affairs Bureau. This is critical: failure to cancel leaves an unauthorized person's seal potentially active.
(b) Register the incoming director's seal. The new representative director submits their own seal for registration. The incoming director must also provide their individual seal registration (the director's personal seal registration, not the company seal) as part of the registration process.
(c) Update the bank. The bank must be notified of the representative director change and provided with the new representative director's authorization. The bank will update its signatory records and may require a new 銀行印 to be registered if the previous seal was personal to the outgoing director.
(d) Notify counterparties. Major counterparties who hold Seal Registration Certificates referencing the old director's registration should be notified and provided with updated certificates.
In M&A transactions
Post-M&A seal management is a common source of operational disruption. See Post-M&A Regulatory Integration for detailed guidance on seal transition during ownership changes. The critical risk: if the outgoing representative director's seal registration is cancelled before the bank has processed the new signatory authorization, the company may temporarily lose the ability to operate its bank accounts.
Electronic Signatures and the Decline of Paper-Only Processes
Japan has been progressively digitizing document authentication. The electronic signature framework under the Act on Electronic Signatures and Certification Business, R2 (電子署名法) provides a legal basis for electronic signatures to have equivalent legal effect to handwritten signatures and sealed documents for many purposes.
What has changed:
(a) Electronic filing of corporate registration documents with the Legal Affairs Bureau is now available and is the standard route for professional scriveners.
(b) Electronic signing of commercial contracts using qualified electronic signature services (DocuSign, CloudSign, GMO Sign, and others) is now widely accepted in Japanese commercial practice, particularly for B2B contracts.
(c) Some banks now accept electronic authorization for routine transactions, though their acceptance of electronic signatures on account mandate documents varies.
What remains paper and seal dependent:
(a) Legal Affairs Bureau filings for certain types of changes (some still require physical documents with the registered seal).
(b) Real property registration documents.
(c) Notarized documents (定款 notarization for KK, real property transfers).
(d) Court filings.
(e) Bank account opening documents at most major banks.
Practical conclusion for foreign-owned companies: Maintain the physical seal infrastructure as described in this guide. For commercial contracts with B2B counterparties, electronic signing is increasingly accepted and may reduce the burden of managing physical seals across borders. However, do not eliminate the physical seal infrastructure; it remains required for the categories above.
Practical Seal Management for Foreign-Owned Companies
The overseas-director challenge
When the representative director is overseas, the physical seal creates a practical problem: the seal must be in Japan to be used for local filings and contract execution, but the director is not in Japan.
Common approaches:
(a) Japan-resident representative director: The most reliable solution. A Japan-resident representative director can hold and use the seal for routine matters. See Japan Nominee Representative Director for considerations on nominee arrangements.
(b) Authorized signatory with power of attorney: For specific, defined transactions, the representative director can grant a power of attorney (委任状 (ininjosho)) to a Japan-resident agent to use the seal on their behalf. The scope of the power of attorney must be clear and specific. General, open-ended delegation of seal use raises 名義貸し (name-lending) concerns under applicable legal principles.
(c) Periodic in-person signing sessions: For companies with infrequent high-stakes transactions, the representative director travels to Japan for signing sessions and executes batches of documents during the visit.
(d) Electronic signing for eligible documents: Use electronic signatures for contracts and documents where counterparties accept them, reducing reliance on the physical seal.
Seal storage and security
The representative director seal should be stored in a fireproof safe or dedicated secure location in the registered office or a trusted Japan address. Access should be logged. The seal should not be stored in a general office area accessible to all staff.
The bank seal should be stored separately from the representative director seal. Keeping both in the same location and under the same access reduces the internal control benefit of having separate seals.
What to do if a seal is lost
(a) Representative director seal: File a Seal Registration Cancellation Application immediately at the Legal Affairs Bureau. Order a new seal. File a new Seal Registration Application. Notify the bank and major counterparties. Time-sensitive: until the old registration is cancelled, a person with the lost seal could potentially execute documents as the company.
(b) Bank seal: Notify the bank immediately. The bank will freeze the account for seal-based transactions and work through its seal replacement procedure. This typically involves a waiting period during which the bank verifies no fraudulent transactions have been attempted.
(c) 角印: Replace and continue. No registration implications.
Seal Material and Cost
Corporate seals are available in a range of materials, each with different durability, prestige perception, and cost:
(a) Ebony (黒水牛 / こくすいぎゅう): Most common choice for corporate seals. Durable, resistant to warping, professional appearance. Mid-range cost.
(b) Titanium (チタン): Highest durability, does not warp or shrink, consistent impression quality over time. Higher cost. Preferred for long-term use.
(c) Acrylic and resin: Lower cost, lighter, suitable for 角印 and 銀行印 where material prestige matters less.
Cost range: A complete set of three corporate seals (法人代表印, 銀行印, 角印) from a reputable seal-maker ranges from approximately ¥10,000 to ¥50,000 depending on material and urgency. Titanium representative director seals can cost more for premium craftsmanship.
Lead time: Standard delivery is 3 to 7 business days. Rush orders (1 to 3 business days) are available at additional cost. Order the 法人代表印 early in the incorporation process; you cannot complete registration without it.
Summary
The Japan corporate seal system is a legal infrastructure, not a bureaucratic formality. Operating a Japanese company without understanding it leads to operational failures.
Key points:
- 法人代表印: Registered with the Legal Affairs Bureau. Required for major contracts, government filings, and legal authentication. Custody must be controlled by the representative director.
- 銀行印: Registered with each bank. Required for banking authorizations. Keep physically separate from the representative director seal.
- 角印: Not registered. Used for routine commercial documents. Lowest stakes, highest frequency.
- Seal Registration Certificate (印鑑証明書): Counterparties use this to verify the registered seal. Request fresh certificates (within 3 months) for each significant transaction.
- Director changes: Cancel the outgoing director's registration before or simultaneously with registering the new director's seal. Coordinate with the bank.
- Electronic signatures: Accepted for an increasing range of commercial documents but do not replace physical seal requirements for government filings, notarization, and banking.
This article is for informational purposes. Consult a licensed judicial scrivener (司法書士) or attorney (弁護士) for specific seal registration and corporate document needs.