Privacy Policy

Last updated: September 15, 2026

This is an English translation of the Japanese original. If there is any discrepancy between the two, the Japanese version prevails.

The operator of ARCOIRIS ("we" or "us") complies with Japan's Act on the Protection of Personal Information and handles the personal information obtained in providing this website and our products as described below.

1. Business Information

Name of the businessWe will answer without delay upon request from the person concerned.
AddressWe will answer without delay upon request from the person concerned.

2. Personal Information We Obtain

We do not obtain or store payment information such as credit card numbers. Payments are processed on the payment service provider's systems, and card information is handled directly by that provider.

3. Purposes of Use

We use the personal information we obtain only within the scope of the following purposes.

If we wish to use personal information beyond the scope of these purposes, we will obtain your consent in advance.

4. Provision to Third Parties

We will not provide personal information to third parties without your consent, except in the following cases.

5. Outsourcing

To the extent necessary to achieve the purposes of use, we outsource work to the following external services. We supervise these contractors as necessary and appropriate to ensure proper handling.

Payment processing Stripe Japan, Inc. (Japan)
Stripe Payments Europe, Limited (Ireland; for the handling of personal data only)
Information provided: email address, name, purchase details
Inquiries on LINE LY Corporation (Japan)
Information provided: LINE display name, message
Website hosting XServer Inc. (Japan)
Information provided: access logs
Web font delivery Google LLC (United States)
Your IP address is sent when a page is displayed

6. Provision to Third Parties in Foreign Countries

Among the services in section 5, Stripe Payments Europe, Limited is based in Ireland. Ireland is a member state of the European Union (EU), and the EU has been designated by Japan's Personal Information Protection Commission as a foreign country with a personal information protection system recognized as equivalent to Japan's in protecting individuals' rights and interests (Personal Information Protection Commission Notice No. 1 of 2019).

Communication with Google LLC (United States) is made directly by your browser to fetch web fonts when a page is displayed, and to load a YouTube video when you press play on the how-to video on the post-purchase page. It does not involve us providing personal data we hold.

7. Security Measures

8. Cookies

This website does not use cookies for advertising or analytics. However, as noted above, communication with Google LLC occurs to deliver web fonts.

The how-to video on the post-purchase page is loaded from YouTube (Google LLC, United States) only when you press play. It uses privacy-enhanced mode (youtube-nocookie.com), a setting under which your viewing is not used to personalize your YouTube browsing or ads. Once the video is playing, Google LLC's privacy policy applies to your viewing. You can still use this website with cookies disabled in your browser.

9. Requests for Disclosure, Correction, Suspension of Use, etc.

If you request notification of the purposes of use of your retained personal data, or its disclosure, correction, addition, deletion, suspension of use, erasure, or suspension of provision to third parties, we will respond without delay in accordance with the law after confirming your identity.

Please send requests to the contact point below. We may ask you to present documents confirming your identity. For disclosure requests, we may charge a fee within the scope permitted by law.

10. Contact Point

Questions and complaints about the handling of personal information, and requests under the previous section, are accepted at the following contact point.
Personal information inquiries: the contact form or LINE (ID: @782utres)

11. Changes to This Policy

We may change this policy due to amendments to laws or changes in our business. The revised policy applies from the time it is posted on this page. We will announce any significant changes on this website.