You studied ている last month, but when ておく appears, you cannot remember how they relate.
You, last semester
979 grammar · 14 particles · N5–Non-N · Free
Finally see how Japanese grammar fits together.
A visual skill tree that shows you what to learn next — not another list to memorize.
979
Grammar points with explanations and examples
6
JLPT levels from N5 through N1
Free
No subscription or signup wall
⌘K
Instant search from anywhere in the app
The problem
Textbooks teach chapters.
Japanese builds connections.
If any of this sounds familiar, a skill tree will change how you study.
Start with a clear path ›Your textbook jumps ahead while gaps in earlier grammar quietly pile up.
You, last semester
You have a long list of “learned” points—but no clear picture of what to study next.
You, last semester
The difference
What changes when you study on a tree
The old way
- Flat lists and chapter order
- Easy to forget earlier points
- No view of what to study next
- Progress feels invisible
With 日本語文法
- Visual paths between related grammar
- Prerequisites surfaced automatically
- JLPT filters and completion tracking
- Explorer to see the full picture
Built to convert study time into progress
Everything you need. Nothing you do not.
Learning paths
See what leads to what.
Every grammar point connects to prerequisites, synonyms, and related patterns. Instead of memorizing in isolation, you study how Japanese actually builds.
Progress tracking
Always know where you stand.
Mark points as learning or mastered. Your dashboard shows exactly how much of each JLPT level you have covered—and what is still ahead.
Instant search
Find any point in seconds.
Press ⌘K anywhere in the app. Search by Japanese, English meaning, or JLPT level and jump straight to the explanation.
Cross-device sync
Your progress, everywhere.
Show a QR code or scan one with your camera to merge progress on your phone, tablet, or desktop. Sync is additive—mastered points never get downgraded.
Up and running in minutes
No onboarding flow. No credit card. Open the app and mark your first point.
- 1
Pick your level
Filter to N5, N4, N3, N2, or N1—or browse the full tree. Start where you are, not at page one of a textbook.
- 2
Study with context
Read explanations, examples, and cautions. Follow learning paths to see prerequisites and what comes next.
- 3
Track and explore
Mark progress as you go. Open Explorer to pan the full graph and spot gaps before your next JLPT attempt.
だ
です
て
ている
ておく
てある
わけだ
てしまう
ものだ
わけがない
N5N4N3N2
Visual learning
See every connection at once
The Explorer shows the full grammar graph — pan, zoom, and discover how points relate. Filter by JLPT, enable Discover Mode to see what to learn next, or use Study Mode to highlight synonyms.
Open ExplorerParticle practice
Particles are hard. Drill them until they click.
は or が? に or で? Stop second-guessing. The particle drill gives you one real sentence at a time with the particles blanked out — tap a blank, pick from a popover, and get instant feedback. Sentences are matched to your JLPT level, from N5 basics to N1 patterns.
- One sentence at a time — focused, low-pressure recall
- Tap-to-fill blanks with a particle picker, no typing required
- JLPT-graded sentences from N5 to N1 with hints and translations
Made for how you actually learn
JLPT candidates
Study level by level with a clear completion percentage. Know exactly how many points remain before exam day.
Self-directed learners
No course schedule imposed on you. Follow connections that match how you actually encounter grammar in the wild.
Returning students
Pick up where you left off. Sync progress across devices and fill gaps you did not know you had.
See the entire grammar graph at once
Explorer mode lets you pan and zoom across all 979 points. Filter by JLPT, search synonyms, and use Discover mode to surface connections you have not studied yet.
N5 (132)N4 (185)N3 (220)N2 (221)N1 (187)Non-N (13)
FAQ
Questions before you start
Quick answers to the things most people ask before opening the app.
1
Is it really free?
Yes. No account, subscription, or paywall. Open Study and start immediately.
2
Where is my progress stored?
In your browser by default. Use Sync in the app header to show a QR code, scan one with your camera, or copy a link to another device.
3
How is this different from textbooks or Anki?
This app is built around a visual skill tree—not flashcard queues or chapter order. You see connections between points and choose your own path through 979 grammar entries.
4
Do I need to finish N5 before N4?
No. Filter to any level, but learning paths show what relates to what so you can backfill gaps whenever you are ready.
Your skill tree is waiting.
Pick a grammar point. Follow the connections. Mark your progress. It takes thirty seconds to start—and it is free.