Train your kana.
Build a buff cat.

Meet Kuro-nyan. Your study buddy. Your gym buddy.
Get stronger together, one Hiragana and Katakana rep at a time.

Coming soon onApp Store

Coming soon onGoogle Play

starts chonky.
gets stronger with you.

KanaGym training: choose the sound for あ while Kuro-nyan lifts a barbell

ONE REP AT A TIME

Hiragana + Katakana15 reps per set5 stages of Kuro-nyanYour daily kana workout

THE ROUTINE

Less cramming.
More little wins.

You don’t need a marathon study session.
Just show up for your next set.

01WARM UP

Say hello to new kana.

Meet a few new characters and hear their sounds. No score. No timer. Just a friendly first rep.

Warm-up cards introduce あ, い, and う with audio

02TRAIN

Think fast. Grow faster.

See the kana. Pick its sound. Quick, correct answers give each character a bigger boost—turning “I think I know this” into “I’ve got this.”

03GROW

Make every set count.

Build your mastery, work toward your daily goal, and give Kuro-nyan something to flex about.

Set complete: Kuro-nyan celebrates 15 successful reps

MEET YOUR TRAINING PARTNER

Your progress
looks good
on him.

From a little chonky to a whole lot of strong. As your kana mastery grows, Kuro-nyan grows with you.

And a day off? It won’t undo his gains.

Pick a stage. Meet your future gym buddy.

MUSCLE STAGE 01 / 05

Chonky

Every strong start has a little wobble.

Kana Stats shows overall mastery, Hiragana, Katakana, and progress for each character

Kana detail: あ has 20% mastery and its next review is tomorrow

little by little

PROGRESS YOU CAN SEE

Know what sticks.
Train what doesn’t.

A lucky guess feels good. Really knowing it feels better.

Your whole kana journey.

Practice Hiragana and Katakana, from the basics to character combinations.

The right rep, at the right time.

Spaced reviews bring kana back so you can keep building on what you’ve learned.

More than a streak.

See mastery, successful reps, and response times for each character.

BECOME A KANAGYM RAT Kuro-nyan proudly holds a lifetime gym membership card

GO BEYOND YOUR DAILY WORKOUT.

Get Lifetime Membership.

Train more. Master kana faster.

The full kana curriculum is free. Want to master Hiragana and Katakana faster? Go Premium for unlimited training sets and more ways to practice.

Unlimited training sets
No ads required
5 Hearts per set
Practice without a timer
Custom workouts & weak-kana drills

One-time purchase. Available inside the app.

YOUR JOURNEY TO MASTERING JAPANESE STARTS HERE

Ready for your first set?

Kuro-nyan’s ready when you are.