Short, calm reading practice. Built for adults who want to recognise katakana in real places.
Your progress stays on this device. No account, no backend, no tracking.
No streaks. No score. No grades. Just sorting.
Reviews, onboarding answers, and trip date stay on this device in browser storage. There is no sync, no account, no server copy.
Clearing browser data for this site removes everything. The About screen also has an Erase button if you want to wipe local data without touching other sites.
Phase 1 does not use analytics, advertising trackers, or third-party scripts. No pixels, no fingerprinting, no behaviour logs.
If that ever changes, it will be announced here first, on its own page, before any tracker is added.
The drawers use brand names from anime, K-pop, wine, and Tokyo districts as reading prompts. Those names belong to their respective owners. katakana.help does not claim any rights in them.
No artwork, sprites, audio, or other assets from those works are bundled. The app ships text only.
A small worker caches the app shell and word drawers in your browser, so the app keeps working when you are on a slow train or away from Wi-Fi.
The cache lives only on your device. No data leaves the browser.
katakana.help — a Yugasumi project.
Contact: privacy@yugasumi.com
Last updated: July 2026