E-signature laws in Japan

Japan's Act on Electronic Signatures and Certification Business (2000) establishes the legal framework for electronic signatures. Despite Japan's traditional reliance on hanko (personal seals), electronic signatures are legally valid and increasingly adopted for business transactions.

Act on Electronic Signatures and Certification Business (Denshi Shomei Ho) (2000)

Key provisions

• An electromagnetic record with an electronic signature is presumed genuine if the signature was created using a method under the exclusive control of the signatory (Article 3).
• Electronic signatures are legally equivalent to seals (hanko/inkan) for most commercial purposes.
• Accredited certification authorities issue electronic certificates with legal presumption of validity.
• The 2020 METI and MOJ guidance confirmed that cloud-based e-signatures satisfy Article 3 requirements.
• No specific technology is required — the focus is on reliable identification of the signatory.

What you can't e-sign in Japan

• Notarized documents requiring in-person appearance at a notary public.
• Certain real estate registration documents with the Legal Affairs Bureau.
• Documents requiring registered personal seals (jitsuin) with seal registration certificates.
• Some government filings that specifically require hanko or jitsuin.

Practical tips for Japan

• The 2020 government guidance was a game-changer — cloud-based e-signatures like SignOwl now satisfy Japanese law.
• Many Japanese companies still expect hanko as a cultural norm; discuss e-signature acceptance with your counterparty before sending.
• For contracts with Japanese companies, include a clause confirming mutual agreement to use electronic signatures.
• Major Japanese corporations (Toyota, Sony, etc.) adopted e-signatures during COVID-19 and haven't gone back.