毎日の文法チャレンジ
Daily Japanese grammar practice, one sentence at a time
Get a grammar point each day, write one original Japanese sentence, and receive instant AI教師 feedback. A calm, five-minute ritual you can keep from your computer or phone — wherever your day takes you.
Free to join · Email and password · No card required
日本語が上手になるように、毎日練習しています。
試験に合格するように、頑張ります。
A simple daily loop
The ritual is small on purpose — a five-minute habit that fits into any day. Show up each day and the practice compounds.
- 01Receive the grammar point
Each day opens with one shared grammar point — a pattern to focus on, with a short, calm explanation.
- 02Write one sentence
Compose a single original Japanese sentence using the pattern. One thoughtful sentence beats a hundred drills.
- 03Get AI教師 feedback
Your personal AI教師 reads your sentence and responds with focused, encouraging feedback in seconds.
- 04Build your streak
Save your work, grow your daily streak, and revisit everything you have written in your history.
Everything you need to keep practicing
Focused tools that support the daily habit — nothing that gets in its way.
One shared grammar point per calendar day. Same-day editing means you can refine your sentence before it settles.
An always-available teacher that reviews your sentence, points out what works, and gently corrects what doesn't.
Short, low-pressure quizzes to reinforce the grammar you have been practicing without breaking your calm.
Furigana and reading support keep Japanese text approachable, so you spend energy writing rather than decoding.
Every sentence you submit is saved. Your profile holds your streak and a quiet record of how far you've come.
A calm, minimalist interface that works from any computer or phone. Wherever you are, five minutes is enough to keep the habit going.
- Free beta — full daily practice while we're in public beta
- Founder Plus — early supporter plan with extended AI教師 access
- Founder Plus — early supporter access with secure Stripe checkout
なぜ Hibi Mondai なのか
For real learners with busy days
Most apps reward streaks of tapping. Hibi Mondai rewards writing. We believe real progress in Japanese comes from producing the language yourself — one honest sentence at a time, every day.
It’s built for serious learners, but serious doesn’t mean it has to take over your day. Meaningful practice should be reachable from a computer or phone and sustainable even when you only have five minutes — so we made the smallest thing that works: a single daily grammar point, space to write, and a patient AI教師 to respond. No noise, no leaderboards, no pressure. Just a calm ritual you can keep for years.