A desktop app for Windows · 夜間飛行
Step into
Japanese.
JPLearn's menu is a floating Japanese world — and the learning inside is just as deliberate: spaced repetition, seventeen practice modes, and a tutor that never phones home.
Menus you fly through, not tabs you hunt.
JPLearn's home screen is a 3D Japanese environment. Study areas are places, and moving between kana, kanji and conversation is a camera flight — like the one you're on now.
Six islands, crossed in order.
A 16-node curriculum graph runs from your first hiragana to N1. Blocks unlock at 80% mastery of the one before — and every gate is soft: the app warns, you decide.
Seventeen lanterns, one flame.
Every mode is a different light on the same memory — so review never collapses into flipping flashcards. Handwriting is checked stroke by stroke on a canvas; speech is graded by ear.
FSRS decides which lantern lights next.
Gravity for what you learn.
FSRS models your forgetting curve per card — stability, difficulty, retrievability — and schedules each review for the moment before a word slips out of orbit.
- 90% target retention, tunable to your pace
- ×3 priority for due cards, so nothing starves
- 3 of 5 misses flags a leech for focused drilling
A guide who lives here.
The optional AI tutor is a local llama.cpp model sized to your RAM, from 1.4 to 5.5 GB. VOICEVOX speaks Japanese aloud; Whisper grades your speech — all offline, on your own hardware.
Your sky fills in.
XP to level 100, streaks that survive timezones, milestone badges, JLPT readiness for every level — stored in a local database, exportable to CSV whenever you like.
- 8-day streak, UTC-and-local safe (example save)
- 126 characters and words mastered
- 68% ready for N5, tracked per level
The gate is open.
JPLearn is built in the open — watching the GitHub repo is how you hear about the Windows download and the Kickstarter the moment they land.
No mailing list, no tracking — GitHub is the only bell we ring.
The Kickstarter, at a glance.
Straight from the campaign story — real counts from the current build, the plan after funding, and what each tier gets.
The full story goes live with the campaign — watchers hear first.
When does JPLearn launch?+
There's no fixed date yet. Development happens in the open — watching the repository on GitHub is the most current source of truth.
What platforms will it run on?+
JPLearn is being built for Windows first. Other platforms depend on interest, so watching the repo genuinely helps that conversation.
Will JPLearn be free?+
Pricing hasn't been decided. It'll be shared closer to launch — keeping daily study accessible is a goal, not an afterthought.
Does the AI tutor need the internet?+
No. The tutor is optional and runs a locally installed model on your own machine. Explanations work offline, and nothing you type leaves your device.
What happens to my study data?+
It stays in a local database on your machine. There's no account, no telemetry, and no tracking — the app works fully offline.
Is JPLearn open source?+
Yes — the source, issues, and progress are all public on GitHub under the Apache 2.0 license.