Smart Spaced Repetition
An adaptive SRS engine schedules each kanji's next review right before you're likely to forget it, so study time goes where it actually matters.
Learn Japanese Kanji Like a Game
LUNA turns JLPT kanji study into a spaced-repetition adventure. Collect characters as cards, flip them into flashcards, quiz yourself, and level up from N5 all the way to N1.
Why LUNA
Collect Kanji Like Loot
Every character is a collectible card with a rarity tier, from Common at N5 up to Legendary at N1, so your vocabulary grows into a set you can watch fill in.
Flashcards + Mini Quizzes
Flip a card to reveal readings, radicals, and a mnemonic story, then test yourself with an instant multiple-choice check.
Streaks & Leaderboards
Keep a daily streak alive and see how your weekly XP stacks up against other learners on the leaderboard.
Your Path Through the JLPT Levels
Five realms, five JLPT levels, and you unlock the next one as your XP grows.
N5
Sakura Valley
First radicals, numbers, and tiny wins
Common
N4
Lantern Village
Daily life words and useful actions
Uncommon
N3
Ribbon Forest
Conversation, nuance, and confidence
Rare
N2
Cloud Dojo
Media, work, and advanced reading
Epic
N1
Moon Palace
Literary mastery and delicate meaning
LegendaryFrequently Asked Questions
What is LUNA?
LUNA is a gamified kanji mastery app for learning Japanese. Instead of static flashcard lists, kanji are collectible cards with rarity tiers, spaced-repetition reviews, mini quizzes, and a level-by-level map from JLPT N5 up to N1.
Which JLPT levels does LUNA cover?
All five: N5, N4, N3, N2, and N1. Each level unlocks as you earn XP, opening a new themed "world" (from Sakura Valley at N5 to Moon Palace at N1) with its own set of kanji to collect.
How does the spaced repetition work?
Every kanji you review has an SRS (spaced repetition system) stage. Cards you answer correctly get scheduled further out; cards you miss come back sooner, so review time goes to the characters you're actually at risk of forgetting.
Is signing up free?
Yes, creating a LUNA account is free. Sign up, verify your email, and you can start collecting N5 kanji right away.