Privacy Policy

1. Principles

Typing Musou ('this site') treats protecting user privacy as a core responsibility. This policy describes what information we collect, how we use it, how we manage it, and your rights. The Service is open to users of all ages, but children under 13 must use the Service only with the consent and supervision of a parent or legal guardian. If a parent or guardian has concerns about how a child's personal information is handled, please contact us via the contact page.

2. Information we collect

We may collect the following information. Note that we do not store passwords; authentication is delegated to Google.

• Google account information — upon Google sign-in, we receive the Google account identifier (sub), email address, display name, and profile picture URL. Not collected in guest mode.
• Profile information — username, selected character/title/effect, avatar icon, and friend code. Configurable by the user.
• Gameplay data — battle history (WPM, accuracy, win/loss, rating changes), dojo training sessions, owned items and in-game currency, transaction log, seasonal rankings, and friend relationships.
• Inquiry content — category, message body, optional email address, and user agent, retained so the operator can reply.
• Technical information & logs — IP address, browser/device info, access timestamps, and anti-cheat logs. Collected automatically for security and abuse prevention.
• Cookies & local storage — used for login session management (NextAuth JWT), saving game settings, and ad delivery.

3. Purposes of use

Collected information is used solely for the following:

• Providing game features such as matchmaking, friends, leaderboard aggregation, and data sync
• Authentication via Google, session management, and security
• Detecting and responding to abuse such as cheating, macros, and rating manipulation
• Improving service quality and considering new features
• Responding to inquiries and sending important notices
• Delivering and optimizing ads via Google AdSense and similar services
• Statistical analysis, academic research, and third-party sharing or publication of anonymized gameplay data (see Article 5)

4. Third-party disclosure & processors

We do not share personal information with third parties without user consent, except in the following cases:

• When required by law
• When necessary to protect life, body, or property
• Disclosure to service providers required to operate the Service — including Google LLC for authentication, Turso / libSQL (AWS Tokyo region) for database hosting, and Google AdSense for ad delivery. These processors handle data only to the extent necessary.

5. Anonymously processed information — research use & third-party sharing

This site may statistically process collected gameplay data into 'anonymously processed information' as defined in Article 43 of Japan's Act on the Protection of Personal Information (APPI) — that is, information processed so that no specific individual can be identified and the original personal information cannot be restored — and may then sell, share, or distribute it to third parties, and use or publish it in academic papers, research presentations, public datasets, and similar outputs. The aim is to contribute to research in typing skill development, esports, and human–computer interaction.

• Categories processed — typing speed (WPM), accuracy, win/loss, rating trajectories, mistype patterns, play time distributions, dojo and infinite-circuit stage progress, and other statistical data derived from gameplay.
• Items removed or substituted — Google account identifier (sub), email address, real name or display name, profile picture, IP address, username, friend code, inquiry content, and any other information that could identify a person are never included.
• Disclosure on third-party provision — when anonymously processed information is provided to a third party, the categories of items provided and the provision method will be published on this page, and the recipient will be informed that the information is 'anonymously processed information.'
• No re-identification — this site will not re-identify specific individuals by matching created anonymously processed information with other data.

6. Advertising & cookies

This site uses third-party ad networks such as Google AdSense. These providers may use cookies based on prior site visits to display interest-based ads. Such cookies are controlled by the respective ad providers.

You can disable Google's use of cookies via Google Ads Settings.

7. User rights

Users have the following rights regarding their own personal information:

• Request disclosure of retained personal data and notification of purposes of use
• Request correction, addition, or deletion of content
• Request suspension of use or of third-party disclosure
• Request deletion of the account and related data (please contact us via the contact page)

8. Data retention & protection

Account and gameplay data are retained while the account is active, under encrypted transport (HTTPS) and appropriate access controls. Upon receiving a deletion request, we promptly erase related data such as battle history, owned items, and friend relationships. Note that leaderboard and battle records combined with other users' records may remain as anonymized aggregate data. Server logs are retained for up to 90 days; inquiry content is retained for a certain period after resolution. Data already anonymized and disclosed to or published by third parties under Article 5 cannot be technically re-identified and is therefore outside the scope of deletion requests.

9. Contact

For privacy questions, please use the contact page.

10. Changes to this policy

This policy may be updated to reflect legal changes or service updates. We will notify users on the site when significant changes occur. Continued use of the site after updates constitutes acceptance of the updated policy.