If you received a file, you can unlock it here
A system with no passwords or shared links eliminates the risk.
No app to install. Works in your web browser.
この製品は（公財）東京都中小企業振興公社 中小企業ニューマーケット開拓支援事業の支援対象製品です。但し、公社は製品の効能効果を保証するものではありません。
Misdelivery, large files, open tracking, password-protected ZIPs—Kagisuru solves your file exchange headaches all in one place.
I want to revoke a file I sent by mistake
You can revoke access even after sending, preventing the receiver from opening the file.
POINT:Even after the attachment reaches the receiver, you can revoke it before it is opened!
I want to send files too large to attach
Send large files via email. Kagisuru's cloud only stores encrypted files, so your data stays safe.
POINT:You can send files larger than 1 GB!
I want to know if the receiver opened the file
Track when and who unlocked each file. Useful for confirming delivery and managing important documents.
POINT:You can also track who in your department has opened a file!
I want to stop receiving password-protected ZIPs
Create a dedicated page for receiving files securely from external parties. Files are sent in an encrypted state.
POINT:Just share the receiving page URL to eliminate password-protected ZIPs with your partners!
The passwords and share links that cause hassle and leaks are never created in the first place.
No separate email to send a password or link. You can place files securely right into your existing conversation, free from the burden of managing complex permissions.
Files are encrypted on your own PC. Unencrypted files are never stored on our servers.
Encrypted files can be sent via email, Slack, Teams, USB drives, isolated networks, or any method, and even if leaked the contents stay protected. No need to change your existing workflow or your partners environments.
Much easier and safer than managing passwords. Unlocking requires a one-time passcode (6-digit number) for authentication.
For receivers already using Kagisuru, additional passkey authentication ensures secure identity verification.
No account setup needed. Get started now with just your email.
Create files that only specific recipients can open by simply entering their email address. You can specify anyone, even if they don't use Kagisuru, and no prior account registration is required.
