Judgment-First Keigo

Judgment first.
Conjugation second.

Most keigo tools drill verb forms. This one teaches which register to use on whom — uchi/soto, hierarchy, and the social reasoning textbooks skip.

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言う

iu — the plain form, before any audience is decided

言います

丁寧語 · baseline

Polite to anyone, elevates no one

おっしゃる

尊敬語 · elevate

When someone senior is speaking

申す

謙譲語 · humble

When you're speaking, to someone senior

How it works

Five ways to build judgment

Conjugate common verbs into sonkeigo and kenjougo, graded instantly against a fixed key.

Read a real situation and judge who to elevate and who to humble — not just conjugation.

Walk the actor → addressee → in-group reasoning tree behind every keigo choice.

Reference notes on the gotchas textbooks skip — uchi/soto, hierarchy, and register.

See accuracy by mode and the specific verbs or scenarios worth reviewing next.

FAQ

Do I need an account?: No. Everything works fully in the browser via local storage. Signing in is optional and only adds syncing progress across devices.
Is it free?: Yes. Drills and scenarios are graded deterministically against a fixed key, at zero marginal cost. AI explanations are a capped fallback, not the primary experience.
What's the difference between sonkeigo and kenjougo?: 尊敬語 (sonkeigo) elevates someone else's action. 謙譲語 (kenjougo) humbles your own. The Decision Diagnostic walks through how to tell which one a situation calls for.
Where does my progress go?: It's saved in this browser's local storage. Sign in with a magic link if you want it to follow you across devices.