Learn Japanese
with heart
Beautiful spaced repetition flashcards. Build your vocabulary, earn daily streaks, and make Japanese a habit that actually sticks.
From zero to 日本語 in 4 steps
Create your account
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Explore & collect
Browse thousands of Japanese words or build your own flashcard collections.
Practice with SRS
Our smart spaced repetition shows you each word at exactly the right time.
Track your growth
Watch your stats improve. Keep your streak alive. Level up your Japanese.
See what learning feels like
Real screens from Kokoro Learn — filled with your actual progress.
Everything you need
to learn Japanese
Spaced Repetition
Smart SRS algorithm shows words at the optimal time — more retention with less effort.
Word Collections
Create personal decks or explore public collections shared by the community.
Daily Streaks
Build a daily habit with streaks and XP. Consistency is the fastest path to fluency.
Learning Analytics
Track words learned, accuracy, and JLPT level progress with detailed statistics.
Free Forever
No paywalls, no ads, no subscriptions — ever. Full access to everything, always free.
Quick Sign-in
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Meet your Aibo
Every learner deserves a companion who gets them. Choose your Aibo — they'll cheer you on, push you forward, and make the journey feel less alone.
Calm and nurturing, Yuki guides you with quiet wisdom. She celebrates every small victory and never lets you give up, no matter how hard the kanji gets.
Fearless and determined, Ren turns every lesson into a challenge worth conquering. He pushes you to go further, faster — because he knows you can handle it.
Free forever · No credit card required
Made with 心
for real learners
Kokoro Learn was built because learning Japanese should feel like a journey, not a chore. No dark patterns, no manipulation — just honest tools that help you grow, one word at a time.
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Designed to support you from N5 basics to N1 mastery — at your own pace.
Share your word decks publicly and benefit from decks created by other learners.
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Japanese journey?
Build your vocabulary, earn streaks, and make Japanese a daily habit.
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