The day counter
A 300-day streak that still can't order dinner in Tokyo.
In Kumi, streaks cheer you on. Mastery keeps the score.
Fluency is folded
Streak apps count your days. Kumi measures your Japanese.
Kumi tracks what you actually know, down to every kanji and word, and shapes each lesson around it.Kumi keeps track of what you actually know, down to every single kanji and word, and shapes each lesson around it. No guesswork, just what you're ready for next.
The Kumi Mastery TiersWhy we built the Kumi Mastery Tiers
The JLPT has no official syllabus. Apps sell you one anyway.
The JLPT never published a syllabus, so every app's list is a guess. The KMT sorts by what's useful, what's hard, and what you know.The JLPT, Japan's official test, never actually published one. Every app's N5 to N1 list is somebody's best guess. So we built the KMT: it sorts all of Japanese by how useful it is, how hard it is, and how well you already know it.
- Six domains, each with its own tier
- Tiers 1 to 10, earned not assigned
- All JLPT content still covered
The failed folds.
Three ways apps spend your years without teaching you to read.
The flashcard grinder
It collapses knowing a word into pass or fail.
Kumi Lattice challenges words from every angle, not one.
The textbook in app form
Chapter 7 doesn't care what you already know.
No starting over. Mark what you know or import your Anki deck.
Mastery, measured honestly
Your memory has a number.
Everything you learn gets a score from 0 to 100. Recall it for real and it climbs. Let it sit too long and it fades.Everything you learn gets a score from 0 to 100 that moves the way your memory does. Recall it for real and it climbs. Cram and it barely budges. Let it sit too long and it fades. And on your profile, every score becomes a point of light in a 3D brain of everything you know.
The Kumi Lattice
Flashcards ask one question. Kumi Lattice has nine.
Nine interaction families, each used where it makes sense: read it, type it, say it, hear it, build it. Spaced repetition is just the floor.Kumi Lattice knows there isn't just one way to know a word. Nine interaction families each show up where they make sense: reading it, typing it, saying it, hearing it, building it. Spaced repetition is just the floor.
- Multiple Choice
- Typed Recall
- Spoken Recall
- Listening
- Cloze
- Discrimination
- Tile Assembly
- Stroke Practice
- Production
Your first fold
Learn your first kanji. Right here.
Under a minute. No account.Under a minute. No account.
日本語 is closer than they told you.
You just read that. That's what measured mastery feels like.
Now watch what one kanji unlocks.
Nothing in Japanese is isolated.
Every node is a real word built on 日. Kumi teaches the connections, not the flashcards.Every node here is a real word built on 日, the kanji you just learned. Kumi teaches the connections, not the flashcards.
- 210,000+
- Vocab
- 13,000+
- Kanji
- 1,000+
- Grammar
Make your first fold.
Free to start. Give it a week and Kumi knows your Japanese better than you do.
Not ready? Explore the dictionary first →Your Japanese, on the record.
Claim your @handle and your page goes live: mastery, streak, lists, your brain. One link that proves your Japanese.
Kirin Sensei
@kirinsensei·KMT 10
- 32,816
- Concepts learned
- 32,816
- Mastered
- 1,000d
- Streak
- 1,000,000,000
- EXP
A trimmed preview. Real profiles carry ranks, lists, every domain, and more.
Watch your Japanese take shape.
A real learner’s brain, live right now. Drag the timeline and watch it form.Every concept you learn becomes a point of light: kana, radicals, kanji, words, grammar. This is a real learner’s brain, live right now. Drag the timeline and watch it form.
Mastery is the scoreboard.
Weekly, monthly, and all-time boards ranked by EXP, mastered concepts, and streaks. The board below is live.Weekly, monthly, and all-time boards, ranked by earned EXP, mastered concepts, and streaks. What you see below is live.
See the full leaderboard →Mastery is the scoreboard.
Weekly, monthly, and all-time boards ranked by EXP, mastered concepts, and streaks. The board below is live.Weekly, monthly, and all-time boards, ranked by earned EXP, mastered concepts, and streaks. What you see below is live.
Testimonials
from those who folded before you.
“The feature that I like the most is that the system adjusts to my choices and my abilities. And I really feel it. If you want to experience a language application that adjusts to you and challenges you, this is the best choice on the market.”
Malgosia
Beta Tester
“I really loved using it, because I could quickly learn many different things (Kanji, Vocab, Radicals, Grammar, etc.) Instead of searching for hours what I should learn, I could just use Kumi and learn like 60 new Things in less than an hour :3”
Mika
Beta Tester