Thank you for using Sudoku Takumi. If you have any questions or feedback, please contact us at the address below.
watanabe.delhiberry@gmail.comWhen reporting a problem, please include your device model, OS version, app version (shown on My Page), and what you were doing when it happened. This helps us investigate quickly.
Tap “Import” at the bottom of the screen, then take a photo or choose one from your library. Shoot from directly above so the board fills the frame for the best recognition. You can correct the result afterward.
Your board is saved automatically. Use “Continue” at the top of the puzzle list, or reopen the same puzzle, to pick up where you left off.
On “My Page” you can toggle the background music and sound effects independently and adjust their volume.
Yes. You can play without a connection. An account is optional; signing up lets you save and restore your records.
You can delete it yourself in the app: go to “My Page” → “System” → “Delete account” under “Danger zone”, then tap “Delete” in the confirmation dialog. Deletion completes immediately and cannot be undone. See Account Deletion for details. If you cannot do this in the app (for example, you can no longer sign in), contact us at the address above.