Tabi no Tasuke (the "Service") is a Progressive Web App (PWA, an app that runs in your web browser) provided by mementechs (the "Operator"). Tabi no Tasuke also has a LINE chatbot / LINE Mini App version, but this policy covers the PWA version. By using the Service, you agree to the following Privacy Policy.
This policy applies to the PWA version of "Tabi no Tasuke" and to the Japanese learning game "DamonSlayer" (together, the "Service"). Both can be used with the same registration and login.
| Operator name | mementechs |
|---|---|
| mementabi@gmail.com | |
| Contact | Email to mementabi@gmail.com, or DM on X (@mementechstabi) |
The Service requires pre-registration. To start using it, you must log in either with a Google account matching a pre-registered email address, or with a pre-registered nickname. Anonymous use without registration is not possible.
| Type of information | Details | When collected |
|---|---|---|
| Email address | Email address of users who complete registration (trip registration). Used to send pre-departure reminders and to verify Google account login | At registration |
| Nickname | An identifying string registered by users who choose nickname login | At registration |
| Trip plans | Planned month of visit, length of stay, main cities to visit | At registration |
| Google account email address | Email address obtained when logging in with a Google account. Cross-checked against the registered email above for identity verification | At login |
| Location data (latitude/longitude) | Your current location, obtained when explicitly sent or when taking a photo | When sending location / taking a photo |
| Photos | Photos you take within the Service | When taking/sending a photo |
| Usage logs | Operation history (category selection, spot views, etc.), error logs, location data (latitude/longitude) at the time of search/photo, camera heading/tilt, searched spot names, free-text input for the deep-dive feature, screen transition logs, survey responses | During Service use |
| Voice data (recordings) | Audio you record to answer questions in DamonSlayer. Sent only for speech recognition and never stored on the Operator's servers | When recording an answer |
| Answer text | Text recognized from your recording, and the model answer for the question | When answering |
| IP address | Used temporarily to prevent misuse and enforce rate limiting (Tabi no Tasuke: up to 5 requests per 60 seconds per IP; DamonSlayer: up to 30 requests per 60 seconds) | During Service use |
Information we do NOT collect: Name, phone number, Google account display name/profile picture
The Service sends information to the following external services. We do not provide personal information to any other third party without your consent.
| Recipient | Information provided | Purpose | When |
|---|---|---|---|
| Perplexity AI, Inc. (Perplexity API) | Place name resolved from location data (city/ward, etc.), spot name, search topic entered for the deep-dive feature | Searching nearby spots, generating area/spot explanations | At spot search / deep-dive |
| Geoapify B.V. (Geoapify Places API) | Location data (latitude/longitude) | Searching nearby spots (fallback when no cached data is available) | At spot search |
| Google LLC (Google Places API) | Location data (latitude/longitude) | Searching nearby spots (final fallback if the above two do not find results) | At spot search |
| Google LLC (Google Gemini API) | Photos, text information | Image analysis and generating explanations | When taking/sending a photo |
| Wikimedia Foundation (Wikipedia API) | Spot name (text), location data (latitude/longitude, for nearby spot search) | Obtaining reference information about a spot and fact-checking to prevent fabricated content | When generating a spot explanation |
| Google LLC (Gmail API) | Email address | Sending pre-departure reminders | At registration / when sending reminders |
| Google LLC (Google OAuth2 / login) | Google account email address | Identity verification at login | At login |
| Cloudflare, Inc. (Turnstile) | Browser behavior data (for bot detection) | Preventing misuse and automated access | At registration |
| Microsoft Corporation (Azure AI Speech) | Your recorded voice, text of lines to be read aloud | Speech recognition and speech synthesis (DamonSlayer) | When recording an answer / when a line is read aloud |
| Microsoft Corporation (Azure OpenAI Service) | Model answer text, speech recognition result text | Scoring your answers (DamonSlayer) | When answering |
Third-party privacy policies: Google / Perplexity / Geoapify / Wikimedia / Cloudflare / Microsoft
The Service does not use its own cookies. Login state is kept using browser local storage (localStorage) rather than cookies. The Japanese culture site "JapanTabiNote" (/note/) stores only your display language setting in your browser (localStorage). We do not use this for third-party tracking purposes.
The Service does not impose an age restriction, but users under 13 should use it with parental consent.
This policy may be revised in response to changes in law or the Service. Material changes will be announced within the Service or via email.
For questions about this policy, please contact us by email at mementabi@gmail.com, or send a DM on X (@mementechstabi).
Established: May 17, 2026 (Revised: August 23, 2026; fully revised for the PWA version: September 27, 2026; revised to add DamonSlayer: October 18, 2026)