Smart Spaced Repetition
Our AI adapts the Leitner method to optimize vocabulary retention through intelligent scheduling of Japanese vocabulary lists and kana tests.
AIζ₯ζ¬θͺε¦ηΏStop Studying Japanese.
Start Speaking It.
A suite of focused Android apps that take you from zero kana to reading real Japanese β with Echo Fluency shadowing, spaced repetition, and tools built for how language actually sticks.
Start LearningWhy Our Apps Work When Others Don't
Every tool in the ecosystem is built on proven methodology β not gamification for its own sake
Pronunciation & Pitch Accent
Learn authentic pronunciation through real-time feedback on Japanese tone patterns and comprehensive pitch accent examples.
Advanced Shadowing
Our innovative shadowing approach helps internalize natural speech patterns through structured practice sessions.
Three Apps. One Complete System.
Each tool is purpose-built for a specific stage of your journey β from learning to read kana, to speaking with confidence, to engaging with real Japanese content every day.
Free Android Appβ 4.8 Β· 12 languages
Kana Challenge
Read Japanese in 30 days. A structured, daily program that takes you from zero characters to reading Hiragana and Katakana fluently β with native audio, speaking practice, and daily streaks. No romaji. No shortcuts.
Master Hiragana & Katakana β
Free Android AppJLPT N5βN1
Fluency Tool
Stop just studying Japanese. Start actually speaking it. Echo Fluency shadowing, SM-2 spaced repetition flashcards, a complete JLPT grammar guide (N5βN1), and vocabulary games β all in one system.
Start Speaking Japanese β
Free Android App170k+ dictionary entries
YoMoo!
Read real Japanese. Actually understand it. Authentic news, literature, and JLPT passages with instant furigana, one-tap word lookups, SRS vocabulary, and AI simplification β covering N5 through N1.
Read Real Japanese β
Free Interactive Learning Tools
Explore our collection of free, engaging tools designed to accelerate your Japanese learning journey
Japanese Analyzer
Analyze texts and vocabulary with our reading support tool to better understand grammar and context.
Hangman Kanji Game
Challenge your kanji knowledge with our fun and interactive hangman game.
Kana Quiz Game
Test and improve your Hiragana and Katakana skills through engaging quizzes.
JLPT Crossword Puzzles
Enhance your vocabulary and JLPT prep with our engaging crossword puzzles.
Inside the Apps
A closer look at the screens you'll actually use
Kana Challenge
Fluency Tool
YoMoo
Built Around Learning Objectives, Not Streaks
Every feature in every app exists to move you toward a concrete skill β not to keep you opening the app
Objectives First, Features Second
Kana Challenge's 30-day structure exists because research shows that repeated, spaced exposure over weeks β not random quiz marathons β is how the kana alphabet becomes automatic. The app is designed to graduate you, then get out of the way.
Output Over Passive Review
Fluency Tool's Echo Fluency system is built on a simple truth: reading about Japanese doesn't make you speak Japanese. Every session has you listening, recording, and evaluating your own output β the same cycle real language acquisition demands.
Real Content at Every Level
YoMoo doesn't invent sentences for beginners to read safely. It takes real Japanese β live news, Aozora Bunko literature, JLPT passages β and makes it accessible through furigana, instant lookups, and multi-level simplification.
Spaced Repetition With Purpose
SRS in our apps isn't a retention gimmick β it's tied to what you're actually trying to learn. Flashcards in Fluency Tool are linked to grammar patterns you're shadowing. Vocabulary saved in YoMoo is reviewed at intervals calibrated to long-term recall.
JLPT as a Roadmap, Not a Goal
Fluency Tool's 25-sub-level JLPT roadmap exists because JLPT levels are the clearest shared vocabulary for tracking Japanese proficiency. The roadmap shows you exactly where you are and what to tackle next β then pushes you to use it, not just memorize it.
Games That Reinforce, Not Replace
Fever Pitch, the Hangman Kanji game, and JLPT Crosswords are built on your active vocabulary β not preset word lists. When you win, it's because you actually know the words. They're practice, not a substitute for it.
Frequently Asked Questions
Everything you need to know about learning Japanese with My SenpAI
While both platforms incorporate gamification, our approach focuses on language output with:
- High-volume speaking practice
- Spaced repetition optimized for kanji and kana
- Shadowing exercises to emulate natural speech patterns
Learn more about our innovative EchoFluency Cycle.
Effective practice includes shadowing native sentences, instant audio playback, and self-reflection. Our tools provide:
- Immediate grammar and pronunciation corrections supported by AI
- Visual displays of your spoken Japanese inputs
- Real-time feedback on your speech
Discover more about Japanese Pitch Accent.
Based on our interactive kana quiz, we recommend:
- Start with Hiragana, the foundation for 70% of written Japanese
- Introduce Katakana through familiar loanwords
- Consult our Hiragana vs Katakana charts for clear comparisons
Our shadowing tools boost confidence by offering:
- Phrase-by-phrase advanced shadowing drills
- Opportunities for self-reflection on your speech
- Instant scoring and feedback through speech recognition
Learn more about finding Japanese speaking opportunities.
Immersive reading exposes you to authentic, native-level content that deepens understanding of vocabulary, grammar, and cultural nuances. This method:
- Exposes you to real-world language usage and context
- Promotes clustering and contextual learning for better retention
- Challenges you with slightly advanced material (i+1) to push your limits
- Builds a strong foundation through consistent, manageable practice
Discover strategies in our Immersive Japanese Reading article.
We enhance the classic Leitner system by integrating:
- AI that adapts to your forgetting patterns
- Integrated scheduling for both kana and vocabulary
- Contextual reinforcement through interactive games
Learn about the Leitner SRS System.
Comprehensive Learning Guides
In-depth resources to accelerate your Japanese learning
Japanese Pitch Accent
A detailed guide to mastering the unique intonation patterns of the Japanese language.
Vocabulary Building Guide
Learn proven strategies and techniques to systematically expand your word bank.
Speaking Fluency Guide
An ultimate guide with actionable tips to help you speak Japanese with confidence and ease.
About My SenpAI
We build focused tools that do one thing well β and put them together into a system that actually gets you to fluency
Our Philosophy
Most language apps teach you Japanese. We build tools that make you use it β through speaking, reading real content, and daily practice that mirrors how fluency actually develops. No romaji shortcuts, no gamified busywork.
Who We Are
A small team of language learners and technologists based in Tokyo β obsessed with the gap between studying Japanese and actually being able to use it. Every feature we ship closes that gap a little more.
Ready to go from studying Japanese to actually using it?
Get In Touch