What is Kumi?
If you’ve ever tried to learn Japanese, you already know the feeling.
You open one app for vocab.
Another for kanji.
Something else for grammar.
You’ve got a dictionary tab permanently open.
There’s a YouTube video paused somewhere.
And maybe a Discord server you swear you’ll be more active in.
It’s… a lot.
And somehow, even after doing all that, you still sit there thinking:
“Wait. What am I actually supposed to learn next?”
We’ve been there. Way too many times.
Yoshi’s juggling resources, trying to make sense of everything as a haffu who should be better at this but isn’t (his words, not ours).
I’m bouncing between tools, convincing myself that this next app will finally fix everything.
It never does.
Because the problem isn’t you.
It’s the way all of this is set up.
The “10 apps at once” problem
Most language tools are built in isolation.
One app is great at flashcards.
Another is great at grammar explanations.
Another has decent reading content.
Your dictionary is… just a dictionary.
Individually, they’re fine.
Together? They’re chaos.
None of them talk to each other.
None of them share context.
None of them actually understand what you know.
So you end up doing this weird mental juggling act:
“I learned this word before… I think?”
“Wait, I recognize that kanji but can’t read it”
“This grammar point looks familiar but I don’t get it”
And the biggest issue:
No single place is guiding you.
No system is stepping in and saying:
“Hey. Based on everything you know right now, this is the smartest next thing to learn.”
So you just… guess.
And guessing is exhausting…
So we started asking a simple question
What would this look like if it actually worked?
Not “slightly better flashcards.”
Not “another app with nicer UI.”
We mean fundamentally better.
Like… if you were designing this from scratch, knowing everything we know now… what would you build?
We kept coming back to the same idea:
Your learning tools should understand you.
Not just track what you clicked.
Not just mark something as “seen.”
Actually understand your knowledge.
That’s what Kumi is
Kumi is what happens when you stop thinking in “apps”…
and start thinking in systems.
Instead of splitting everything apart (kanji here, vocab there, grammar somewhere else), Kumi connects it all.
Because that’s how the language actually works.
When you learn a word, you’re also interacting with kanji.
When you study grammar, you need vocab to understand it.
When you read, everything comes together at once.
So why are tools built like none of that overlaps?
Kumi maps these relationships.
So when you learn something, it means something across the entire system.
What that actually looks like (in real life)
Let’s say you learn a new word.
In most apps:
You memorize it.
It goes into a flashcard deck.
That’s it.
In Kumi:
That word is tied to its kanji
Those kanji connect to other words you’ve seen
It knows which parts you struggle with
It knows what grammar uses that word
It knows whether you can recognize it vs actually use it
So instead of just “you learned a word”
…it becomes part of a bigger picture.
Now multiply that across everything you learn.
That’s where things get interesting.
The real unlock: knowing what to do next
This is the part we care about the most.
Because honestly?
Most people don’t quit because learning is “too hard.”
They quit because it’s unclear.
There’s no direction.
You sit down, motivated…
…and then waste 20 minutes deciding what to even do.
That kills momentum fast.
Kumi is designed to remove that completely.
Because once the system understands your knowledge, it can guide you.
Not in a rigid “here’s your lesson plan” way.
But in a smart, adaptive way:
“You know these 80% of the time… let’s reinforce them”
“You’re missing this one concept that unlocks a lot… learn this next”
“You’re ready to start reading this level of content”
It’s less like following a course…
and more like having something that actually thinks with you.
We’re not building “just an app”
This part matters.
A lot.
Because the goal isn’t to drop another icon on your home screen.
We’re building an ecosystem.
Something that fits into how you already learn and spend time.
Our first step is the dictionary.
But not in the “type a word, get a definition” way.
We’re making it something you can use in context, especially on Discord.
You’re already there.
You’re already reading, chatting, immersing (or trying to).
So instead of breaking your flow to look things up…
Kumi comes to you.
You stay in the conversation.
You stay in the moment.
You learn without interrupting yourself.
That’s a big deal.
Because friction is what kills consistency.
Why we’re building this (the honest version)
We didn’t wake up one day like:
“Let’s build a language learning startup.”
This came from frustration.
Repeated frustration.
Trying to do things “the right way.”
Downloading every recommended app.
Watching every “how I learned Japanese” video.
And still feeling like…
There’s no system here.
Just tools.
And tools don’t solve the problem by themselves.
So we decided to build the system we wish existed.
Something that:
Actually connects everything
Actually understands your progress
Actually tells you what matters next
Actually reduces the mental overhead
Because right now, learning Japanese feels harder than it needs to be.
Not because the language is impossible…
…but because the process is messy.
Where we are right now
We’re starting with web.
The dictionary is the first piece going live, along with Discord integrations so you can start using Kumi while we build the rest.
Mobile is coming after.
The bigger system, tracking knowledge across the entire language, is already being designed behind the scenes.
We’re building this step by step.
But always with the full picture in mind.
If this resonates, you’re probably like us
You care about doing things efficiently.
You don’t want to waste time jumping between tools.
You want something that just… works.
And more importantly:
You want to feel progress.
Not just “I did my flashcards today.”
But actual forward movement.
That’s what we’re aiming for with Kumi.
We’re building this in public
We’re going to share everything.
What works.
What doesn’t.
What we’re thinking.
What we’re changing.
Because honestly, this only works if it’s shaped by people who are actually learning.
So if you’ve ever felt stuck…
or overwhelmed…
or just tired of juggling 10 apps at once…
You’re exactly who we’re building this for.
Follow along as we build Kumi.
It’s going to be fun.