特訓 Focused Japanese training

Know it.
Without hesitation.

Tokkun turns the mechanical parts of Japanese—readings, forms, counters, pairings, and sound patterns—into fast, reliable recall.

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A Tokkun verb transformation flashcard with four FSRS review choices

1 · 1 · 2 · 5 day-one review rhythm

FSRS 6 reviews at the right time

A drill app, deliberately

Japanese has parts you understand—and parts you simply need to own.

Tokkun does not try to be another course or encyclopedia. It isolates the high-friction details that reward repetition, then gives each one a focused card and a clear path to mastery.

Short sessions. Honest progress. No noisy streak pressure. Just the difficult things becoming easier, one review at a time.

Built for muscle memory

One difficult point at a time.

Every library category has its own card recipe, so practice stays precise instead of turning into a vague mixed quiz.

数

Numbers

Dates, time, counters, readings, and the sound changes learners hesitate on.

動

Verb forms

Train directed transformations across sixteen forms—from dictionary to target.

自
他

Essential pairs

Transitivity, giving and receiving, fixed keigo, and particle collocations.

形

Adjective forms

Build automatic recall across useful い- and な-adjective transformations.

片

Special spellings

Katakana patterns and high-frequency readings that do not behave as expected.

音

Sound & mora

Curated audio practice for common mora and Tokyo pitch-accent trouble spots.

A calmer review loop

Review what is due.
Add only what fits.

Tokkun uses FSRS 6 to schedule each card independently. Due cards always come first; new cards only fill the remaining room in your round. When review debt grows, Tokkun stops adding more.

01
Choose a narrow scopeCreate up to five active practices, each with its own settings.
02
Practice in short roundsUse flashcards for light recall or input mode for a stricter test.
03
Graduate with confidenceAfter two Easy reviews, Tokkun asks whether the card is truly mastered.