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SUPPORT

Where to get
help

What to check before contacting us, and what to include in your message.

Before you contact us

01

Read the manual

Sign-up, sending, receiving, and settings are covered in the manual.

02

Check the FAQ

Storage, encryption, pricing, and deletion basics are in the FAQ.

Common errors and fixes

These are the error screens you may see, and what to try first.

Maintenance error screen
Maintenance screen. Scheduled maintenance is in progress. Please try again later.
Page not found error screen
“Page not found”. The link may be old, or the transfer may have expired. Ask the sender to send it again.
Internal server error screen
“An error occurred”. Please try again later. If it keeps happening, contact support with the time it occurred.

Frequently asked questions

Where are the files stored?

You can choose your own AWS S3 / Cloudflare R2 or DioTrans R2. Only encrypted data is stored, and files are deleted automatically after their expiry.

Do recipients need an account?

No. Recipients only need the link in the notification email and the 6-digit verification code sent to their inbox.

How long is the free trial?

Seven days from sign-up. Connecting AWS S3 or Cloudflare R2 extends it by 21 days, up to 28 days. Files are limited to 3 MB during the trial.

See all frequently asked questions

Contact channel

CONTACT

[email protected]

Support hours: 9:00–17:00 JST
Telephone support is not available. Please contact us by email.

Usage questions, billing, defects, security reports, and abuse reports are all handled at this address. Do not send vulnerability or abuse details publicly.

Send an email
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For prices and billing conditions, see Pricing and the Billing, cancellation and refunds policy (Japanese). This page does not list prices.

Use the contact form

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If the form is unavailable, email us directly at [email protected].

What to include in your message

USAGE

What you were trying to do

Describe what you wanted to do and how far you got (which screen and button). Check the matching steps in the manual too.

DEFECTS

Reproduction details

Include the steps, the time it occurred, your browser and version, and any error message shown. Do not send files or passphrases.

BILLING

Subscription details

Include your registered email address and the billing date and amount. Do not send payment details such as card numbers.

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See the Privacy Policy (Japanese) for how personal information is handled, and the Acceptable use and abuse reporting page (Japanese) for prohibited use and how reports are handled.