Have a real back-and-forth in Japanese. Pick how you want to practice, chat with Katsu for as long as you like, then stop any time to get an assessment of how you did.
Pick a mode above to see its options.
Katsu stays in character, and adds a short correction note when you make a mistake. Change how Japanese is shown any time — it re-renders instantly.
You can get an assessment of this session, or just pick a different practice mode.