Electronic signatures in Japan on your WordPress server
WPsigner is the self-hosted WordPress plugin for the contracts Japanese web agencies already send: NDAs, service agreements, retainers, quotes, consents, and freelance work. The signed PDF and audit trail stay on the client’s server.
What you can fulfill with WPsigner
In Japan, parties can conclude most private contracts electronically when they agree. WPsigner records that agreement on WordPress — intent, attribution, hashes, and timestamps.
Private contracts by agreement
NDAs, 業務委託, maintenance, quotes, and consents are everyday agency paper. When both sides agree to sign electronically, WPsigner keeps the record on the site you already run.
Evidence on the client’s server
Consent, IP and device metadata, SHA-256 hashes, and an exportable audit trail live next to the rest of the WordPress stack — not in a third-party envelope vault.
The documents agencies already circulate
Onboarding packs, hosting renewals, freelance 業務委託, and policy acknowledgments. One plugin, unlimited envelopes on the licensed site.
Contracts you can sign
Typical private agreements Japanese WordPress shops send every week — with the PDF stored on their server.
NDAs and confidentiality
Mutual or one-way NDAs before a pitch, handoff, or subcontract. Capture who signed, when, and from which device.
Service / 業務委託 agreements
Website builds, retainers, maintenance, and statements of work — the daily paper of a Japanese WordPress shop.
Quotes, orders, and change requests
Accepted estimates, purchase confirmations, and scope changes with a signed PDF next to the project files.
Consents and acknowledgments
Privacy notices, policy acknowledgments, and client approvals with a dated record on WordPress.
Freelance and partner contracts
Designer, writer, and developer 業務委託 with the same audit trail you keep for clients.
HR and employment paperwork
Handbook receipts and employment documents when the worker agrees to electronic form — sent from the same WordPress site.
What Japanese WordPress agencies actually sign
These are the documents production companies already circulate. WPsigner is built for that stack.
Client onboarding pack
NDA + master service agreement + first SOW, sent from the agency site the client already trusts.
Maintenance and hosting retainers
Annual 保守契約 and hosting renewals without moving the PDF into a third-party envelope vault.
Freelance and partner contracts
Designer, writer, and developer 業務委託 with the same audit trail you keep for clients.
Internal policy acknowledgments
Handbook and security-policy receipts for staff or contractors, dated and stored on your server.
WPsigner and CloudSign
CloudSign is a Japanese 立会人型 SaaS. WPsigner is a plugin that runs on the WordPress site you already host.
Where the PDF lives
CloudSign stores envelopes in their cloud. WPsigner keeps the signed PDF and audit log on the client’s server unless you enable an external integration.
Who the product is for
Choose CloudSign when you want a Japan-native witness-type SaaS. Choose WPsigner when a 制作会社 wants signing inside the WordPress stack they already operate.
Same idea, different home
Both can collect a signature on a PDF. WPsigner’s difference is self-hosting: files, branding, and the audit trail stay with the agency’s WordPress.
Timestamps: connect your Japanese TSA
Pro can request RFC 3161 timestamps. If the client already has a Seiko or Amano account, they paste the URL in WPsigner.
Your Seiko or Amano account
If the client already has a Seiko Trust RFC 3161 endpoint — or another TSA that accepts a standard request — they paste the URL in WPsigner.
Pro vs Lite
Pro can call RFC 3161. Lite records a local timestamp. Pick the plan that matches how the agency wants to stamp signed PDFs.
You keep the TSA contract
WPsigner sends the timestamp request. The Seiko or Amano account stays between the client and their TSA provider.
Why agencies keep signing on WordPress
Data stays on the site they already run
Japanese clients often ask where the contract file lives. Self-hosted signing answers that without a new SaaS tenant.
Kanji-ready PDFs
Pro includes Japanese-capable PDF fonts so 漢字・ひらがな・カタカナ render in the signed file.
Flat price, unlimited envelopes on the licensed site
Plans start at $99/year. No per-envelope metering on your licensed WordPress site.
From plugin install to the first Japanese contract
Install on the client’s WordPress
Upload WPsigner, activate the license, and set branding. Files stay on that server by default.
Build the agency templates
NDA, 業務委託, and 保守 PDFs with signature, date, and text fields. Optional OTP or KYC when you want a stronger identity check.
Send the link and keep the trail
The client signs in the browser. You download the PDF plus the audit log. Add a TSA URL if you already have an account.
FAQ
Can WPsigner be used for electronic contracts in Japan? +
Yes. For private contracts where the parties agree to electronic form, WPsigner is an evidence workflow on WordPress: intent, consent, attribution, integrity, and retention. Typical fits are NDAs, 業務委託, retainers, quotes, consents, freelance agreements, and HR acknowledgments.
Which contracts do Japanese WordPress agencies typically send? +
NDAs, website and maintenance 業務委託, hosting retainers, accepted quotes, change orders, consents, freelance agreements, and policy receipts. Those are the documents this page is written for.
What can WPsigner not fulfill in Japan? +
Do not use WPsigner as a substitute for: 電子署名法-certified signatures (Article 3 presumption, 認定認証事業者, JPKI / My Number Card); 電子帳簿保存法 archives as a certified product (you may still connect your own Seiko or Amano RFC 3161 account); 公正証書; wills; farmland (農地) leases; and filings that require 実印 + 印鑑証明. Some counterparties may still ask for paper or a dedicated HR / 宅建 process — follow what they require. This page is not legal advice.
Is WPsigner a CloudSign alternative? +
Both can collect a signature on a PDF. CloudSign is a Japanese 立会人型 SaaS. WPsigner is a self-hosted WordPress plugin, so the file stays on the agency’s server.
Where are signed documents stored? +
On the WordPress server by default. Files leave the site only if you enable external storage, CRM, messaging, payments, or identity providers.
This page is product information, not legal advice. Confirm a specific document with qualified counsel in Japan when you need to.
Stop paying per envelope
Choose an annual or lifetime license with unlimited documents and no per-envelope fees. Keep control of your data and signing workflows.