Is electronic signature legal in Japan?
Yes. Japan's Act on Electronic Signatures and Certification Business (Act No. 102 of 2000) presumes that an electronic record signed with a qualifying electronic signature was authentically made by the signer. Most contracts can be signed electronically, but holographic and sealed wills cannot, and some notarial procedures still require attendance in person.
Last reviewed October 2026. General information, not legal advice.
E-signature law in Japan at a glance
- Status
- Legal
- Approach
- Open: any e-signature can be valid
Types of electronic signature in Japan
Electronic signature
A measure on digital data that shows who created it and whether it has been altered. Japanese law does not set different enforceability tiers; contracts can generally be formed by any method the parties agree on.
Signature meeting Article 3
An electronic signature by the person, which only that person can perform, creates a presumption that the record was authentically made. Cloud-based signing services can qualify according to government guidance.
What you can sign electronically in Japan
- Commercial and sales contracts
- Employment contracts and notices of working conditions (with employee consent)
- Real estate lease and sale documents (since the 2022 changes, with consent)
- Subcontracting order documents (since January 2026, electronic delivery no longer needs the contractor's consent)
Documents that need a handwritten signature or extra formalities
- Holographic wills and sealed wills
- Certain notarial deeds, such as business loan guarantee intention declarations, which still require in-person procedures
Contracts that must be “in writing”
Under the 2021 Digital Reform Act, many laws that required documents in writing or with a seal were amended to allow electronic delivery or signing, often with the recipient's consent. Where a written form is still required, the specific law must be checked.
E-signatures in Japan: frequently asked questions
Do I need a hanko (seal) for a contract in Japan?
No. Japanese law does not generally require a seal for a contract to be valid. Electronic signatures can be used instead, and Article 3 of the E-Signature Act gives qualifying signatures a presumption of authenticity.
Can real estate contracts be signed electronically in Japan?
Yes, since the 2022 changes under the Digital Reform Act, important explanation documents and contracts for real estate transactions can be delivered and signed electronically with consent.
Can notarial deeds be made electronically in Japan?
Since 1 October 2025, notarial deeds are generally created and stored as electronic records, and parties can take part by web conference in some cases. Some procedures, such as declarations of intent to guarantee business loans, still require attendance in person.
Sources
This page is general information about e-signature law in Japan, not legal advice. It was last reviewed in October 2026, and laws change. Check the official sources above or ask a lawyer in Japan before you rely on an electronic signature for an important document. See also whether electronic signatures are legal.
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