About these Cryptex exercises
Spin the rings to assemble each conjugated form in the Adjectives lesson. Building a form from its stem and ending, one piece at a time, makes the mechanics of the conjugation visible instead of memorised whole.
Frequently asked questions
Are these Japanese grammar exercises free?
Yes. Every Cryptex drill for the Adjectives lesson is free and runs right in your browser — no account, no download, no app required.
Do I need to finish the lesson first?
It helps. These drills only use grammar and vocabulary from the Adjectives lesson, so reading the lesson first makes them click faster — but you can also use the drills to test what you already know.
How do these drills help me learn?
Actively producing or choosing an answer — instead of just reading — is what moves a grammar pattern into long-term memory. Each exercise gives instant feedback so you learn from mistakes as you go.
Credit
These lessons follow the structure, sequence, and grammar-first approach of Tae Kim's Guide to Learning Japanese. We are grateful to Tae Kim for making his guide freely available; the explanations here are our own retelling, and the interactive drills are original to this site.