Privacy Policy

1. Introduction

Undertone Archive (the "Service") is a web service that collects interpretations of song lyrics, mainly Vocaloid and internet-born songs, organizes them song by song as each writer's archive, and lets readers vote on whether they agree. This policy explains what information the Service collects and how it is handled.

This policy is provided only in Japanese and English. It applies even if you use the Service in another language.

2. Information we collect

• Account information — the identifier, name, email address and profile image URL we receive from Google when you sign in with a Google account. We never receive your password. The name and handle shown on the Service are chosen by you (we never display your Google name as is).
• Information you enter — interpretations (text, conclusion, position in the song, statements cited as evidence), your profile (display name, bio), songs and artist names you register and their sources, statements by artists or official sources (summary, quote, source URL, outlet, live event date and venue), confirmations and testimonies, URLs of posts you import, and URLs of accounts you register for verification.
• Votes — which interpretation you voted on and how, the time of the vote, and your IP address hashed with a value that changes daily (we do not store the original IP address).
• Share records — the identifier attached to share links, and the number of visits, votes, sign-ups and posts that came through those links.
• Inquiries, reports and removal requests — the email address, name (optional), category and message sent through the contact form, report reasons and notes, appeal text, and the name, email address, target URL and reason in removal requests.
• Usage information — access times, IP address, user agent and cookies. For posting, editing, changing visibility and reporting, we record who did it, when, and the IP address and user agent.

3. How we use it

• To provide the Service (creating, displaying and sharing interpretations, lists by song and by line, vote tallies, and displaying and checking statements)
• To prevent abuse (detecting abnormal voting, limiting the number of posts, preventing impersonation and unauthorized reposting)
• To handle reports and removal requests, and to investigate and act on violations of the Terms
• To verify that imported interpretations belong to you
• To reply to inquiries
• To respond to legal procedures (such as requests to disclose sender information)
• To serve ads (Section 7)

4. Public content

Public interpretations can be viewed by anyone, including people who are not signed in. Unlisted interpretations can be viewed by anyone who has the link. Anonymous interpretations do not show the writer's name. People who add statements or testimonies can also choose to be anonymous.

Who voted and how is not shown to other users, including the writer. Writers and the operator see vote counts; readers see only the agreement ratio.

If you want something taken down, use the report link on the page, or, if you do not have an account, the removal request page.

5. Use of AI

The Service uses AI provided by Anthropic, PBC (United States) for the purposes below. In none of these cases do we send account information such as your name or email address.

• Content checks — when interpretations, profiles or statements are saved or published, we send their content to check that they are not clearly inappropriate (harassment of a specific person, sexual content, discrimination, incitement to violence, illegal activity, spam).
• Question prompts — when you press the button in the writing form, we send the song title, positions and your text. Private drafts are included. Nothing is sent unless you press the button. The AI's questions are not stored.
• Quote guard — when you save an interpretation, we send the parts of the text outside quotes that look like lyrics, to check them.
• Song registration — when you register a song from a video URL, we send the video title and uploader name and receive suggestions for the song title and artist names.
• Translation — when an interpretation whose writer allowed translation is shown in the reader's language, we send its text and conclusion. The translation is stored and shown to other readers too.
• What we send is handled under Anthropic's privacy policy (https://www.anthropic.com/legal/privacy).

6. External pages and services

When you import an interpretation, verify an account you imported from, or add a statement with a source URL, the Service's server fetches the page at the URL you entered. The fetched page is used only to extract text, check quotes and check links; the page itself is not stored. For posts on X, we query X's public embedding service (oEmbed) with the post's URL. The post text is used only for this check and is not stored.

When songs are registered, the Service's server looks up MusicBrainz (a database of music information), and, when video URLs are handled, public information from video services (including the YouTube Data API). Your information is not sent.

Pages of video interpretations embed videos from YouTube, Niconico and TikTok. When an embed is shown, your browser sends information to that company (see the External Transmission page).

7. Advertising

The Service shows Google AdSense ads on the top page, song and artist pages, public interpretation pages, writer profiles and statement pages. Ads are not shown on unlisted pages, pages showing an AI translation, or on writing, settings and admin screens.

Third-party vendors, including Google, may use cookies to serve ads based on your past visits. You can turn off personalized ads in Google's Ads Settings (https://www.google.com/settings/ads).

If you visit from the European Economic Area, the UK or Switzerland, we ask for your consent to cookies used for advertising and measurement through a Google-certified consent management platform (CMP). If you do not consent, non-personalized ads are shown. You can change your choice at any time.

If you visit from certain US states, choices regarding the "sale" and "sharing" of personal information are offered through the same mechanism.

The information sent for advertising and where it goes are listed on the External Transmission page.

8. Sharing and processors

We do not provide the information we collect to third parties except where required by law. We do, however, entrust processing to the following companies to the extent needed to provide the Service.

• Google LLC — sign-in, ad delivery, consent management, font delivery, video information lookups (YouTube Data API)
• Cloudflare, Inc. — hosting, database, counting visits from shares
• Anthropic, PBC — AI content checks, question prompts, quote guard, song registration suggestions and translation (Section 5)
• Plus Five Five, Inc. (Resend) — sending email to the operator when an inquiry or removal request is received

9. Retention

• Interpretations, profiles and statements are kept until you delete them.
• In the records of posting, editing, reporting and similar actions, IP addresses and user agents are deleted after 6 months. The records themselves (who did what and when) are kept to deal with violations of the Terms and legal procedures.
• Hashed IP addresses used for voting are kept with the vote records.
• Records of AI usage are deleted after 35 days. Cached lookups of song and video information are discarded after 7 days.

10. Leaving and deleting data

You can delete your interpretations and statements yourself at any time. You can delete your account yourself from the "Data and leaving" settings page. We will delete your profile, the accounts you imported from, your private interpretations, your votes, and your confirmations and testimonies on statements. You can choose whether your public and unlisted interpretations and the statements you added are deleted or kept anonymously. Interpretations imported from elsewhere are deleted either way, because the link to the original post would identify you. Records of operations and reports are kept for a period to meet legal obligations.

For accounts suspended for violations of the Terms, we keep the identifier to prevent re-registration with the same Google account.

11. Your rights

You may request disclosure, correction, deletion or suspension of use of personal data the Service holds. Please contact us at the address below.

If you live in the European Economic Area or the UK, under the GDPR and UK GDPR you also have the rights to data portability, to restrict processing and to object to processing, and the right to lodge a complaint with the supervisory authority of your country.

12. Cookies

• Keeping you signed in — required for the Service to work; you cannot sign in if it is disabled.
• Votes pressed before signing in — remembered only while you sign in (10 minutes) and applied after you sign in.
• Visits from shares — remembers for one day that you came from a share link, so that later votes, sign-ups and posts can be counted as results of that share.
• Display settings — remembers your display language and banners you have closed.
• For advertising cookies, see Section 7.

13. Changes to this policy

If we change this policy, we will post the new content and the revision date on this page.

14. Contact

Operator

秋吉佳紀

Email

solwren-support@googlegroups.com