Rolko
Web app + browser extension · Learn Japanese from real content

Turn real Japanese into lessons you remember

Explore words while you watch, browse, or read. With Starter or above, save new vocabulary and review it with spaced repetition in one place.

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The web app works on mobile. The browser extension is for desktop.

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This example uses Japanese content with English meanings.

Reading workspace

毎日使える日本語

Tap or hover a word for its pronunciation and meaning. On Starter or above, save it as learned or learning.

Word Coverage

Learned: 25%Learning: 25%New: 50%
先生
毎日少しずつ勉強すると、覚えやすくなります。

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Learn from real content while watching, browsing, and reading

Explore real Japanese words, save new vocabulary with Starter or above, and review it with spaced repetition.

No credit card required.

Free includes lookup, reading, and limited translation. Saving new words starts with Starter.