Is an electronic signature legal in Japan?
Most contracts need not be in writing or signed to be binding, though in practice Japanese parties often sign and affix a company seal as proof of intent. The Act regulates electronic signatures and provides an accreditation regime for certification businesses.
What types of electronic signature are recognized in Japan?
An electronic signature is a measure applied to electromagnetic-record information that (a) indicates the information was created by that person and (b) allows confirmation of whether it has been altered. Japan supports Accredited Certification Businesses (ACBs), whose certificates carry an accreditation mark. An electromagnetic record is presumed authentic where the signature is under the proper sole control of the signer and performed by them; otherwise a challenge may require further evidence (authentication, tamper-evidence, audit log).
What documents can be signed electronically in Japan?
Suitable for HR, procurement, corporate resolutions, NDAs, software licensing, healthcare, banking, real estate, lending, insurance, consumer transactions, and many government filings (depending on the document type).
What documents cannot be signed electronically in Japan?
Some laws and regulations still require hardcopy execution. To rely on the authenticity presumption, ensure the signature is under the signer’s sole control; otherwise strengthen it with authentication and an audit log.
- Specific documents that law still requires to be executed in hardcopy form
- Documents drawn by a public official in their official functions (no authenticity presumption)
What court cases have addressed eSignatures in Japan?
None reported.
What laws govern electronic signatures in Japan?
Disclaimer: This guide is general information, not legal advice, and is not a guarantee that any signature will be enforceable for a particular document, transaction, or jurisdiction. E-signature and data-protection laws change frequently. Confirm the requirements for your specific document and parties, and consult a licensed lawyer in the relevant country before relying on electronic signing.
Last reviewed: June 15, 2026