Hanko and Electronic Seals in Japan

Japan's hanko (判子 / 印鑑) culture runs deep: personal and corporate seals have been central to signing for generations. Recent years have brought a push toward digital workflows, so it's worth understanding both the traditional seals and where electronic ones fit.

This article is general information, not legal advice. Rules change and apply differently to each situation; consult a qualified professional for your specific case.

The main types of hanko

• Jitsuin (実印) — a registered seal, officially recorded with the local government. It's used for the most significant transactions (real estate, vehicles, major contracts) and carries the strongest weight.
• Ginkoin (銀行印) — a seal registered with a bank and used for banking transactions.
• Mitomein (認印) — an unregistered, everyday seal for routine acknowledgments like receiving a package or approving internal documents.

The same physical object isn't automatically all three — its role depends on where (or whether) it's registered.

The move away from physical hanko

Japan has been actively promoting a shift away from mandatory physical seals in many administrative and business processes, encouraging electronic alternatives. The goal is to reduce friction in remote and digital workflows while preserving the legal certainty that hanko traditionally provided.

Where electronic seals stand

Japan's Electronic Signature Act provides that an electronic signature meeting certain conditions can carry legal effect comparable to a handwritten signature or seal. As with elsewhere, the key is that the electronic signature reliably identifies the signer and shows the document hasn't been altered.

A digital image of a hanko — sometimes called a denshi-inkan — varies widely: at one end it's just a picture pasted into a document; at the other it's bound to a proper electronic signature within a compliant service. Only the latter carries the legal assurance. A plain image has no verified identity, no tamper detection, and no audit trail. See electronic seal vs. electronic signature and are image seals legally valid?.

Where this tool fits

The seal generator creates seal graphics for design, mockups, presentations, learning, and lawful personal use — not a signing system. Use it to design and visualize a seal; for documents that need legal effect, use a compliant electronic signature service, and never use a generated seal to forge documents or impersonate someone.

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Comparing jurisdictions? Company seal requirements by country puts this country next to eleven others in one dated, sourced table.

Sources: Act on Electronic Signatures and Certification Business (e-Gov, in Japanese)