Nihongo Diary
๐ŸŒ
Start for free
Build the habit, one day at a time

Write Japanese every day.
Get natural corrections instantly.

Nihongo Diary helps Japanese learners build a daily writing habit with AI corrections, saved diary history, calendar tracking, and learning support from Obie.

No credit card needed ยท Free to start

Today's diaryN4

ไปŠๆ—ฅใฏๅ‹ใ ใกใจๅ…ฌๅœ’ใซ่กŒใใพใ—ใŸใ€‚ๅคฉๆฐ—ใŒใ‚ˆใ‹ใฃใŸใฎใงใ€ใŸใใ•ใ‚“ๆญฉใใพใ—ใŸใ€‚

Nice work! Just one fix: ใ‹ใ‚ใ„ใ„ใงใ—ใŸ โ†’ ใ‹ใ‚ใ„ใ‹ใฃใŸใงใ™

The problem

You've studied the grammar. You still freeze when you write.

Most learners read and listen far more than they produce. Without real writing and honest feedback, the same mistakes repeat โ€” and motivation quietly fades when no one is there to say "close, try this."

The solution

A small diary today beats a perfect essay someday.

Write a few honest lines in Japanese. Obie corrects them, shows you a natural version, and points out exactly what to fix. Save it, and tomorrow you do it again. That loop is how fluency is actually built.

  • Write at your own level, from N5 to natural
  • See corrections and a native-style rewrite side by side
  • Keep everything, and watch the calendar fill up

3 min

A daily entry

N5โ€“N3

Levels supported

100%

Entries saved

Daily

Habit by design

Features

Everything you need to keep writing.

Instant AI corrections

Get a corrected version, a natural native rewrite, and clear notes the moment you finish writing.

Saved diary history

Every entry and its corrections are kept in one place, so you can look back and watch your Japanese grow.

Calendar & streaks

See your writing days fill the calendar. A visible streak makes the habit feel real and worth protecting.

Learning support from Obie

Templates, key ideas, and friendly tips from Obie help you start writing even on the days you feel stuck.

Corrections at your level

Choose N5 to Natural and a correction style, so feedback matches where you are โ€” not where a textbook assumes.

Built for daily habit

Three sentences is a great day. Nihongo Diary is designed around small wins, not perfect essays.

How it works

Four steps, every day.

01

Write a few lines

Open today's diary and write in Japanese โ€” as little as one sentence is enough to count.

02

Get natural corrections

Obie returns a corrected version, a natural rewrite, your key mistakes, and useful vocabulary.

03

Save and review

Keep the entry in your history and revisit the corrections whenever you want to reinforce them.

04

Watch your streak grow

Each day fills your calendar. Small daily writing compounds into real, lasting fluency.

Pricing

Start free. Upgrade when you're ready.

Free

$0

  • 1 AI correction / day
  • 300 characters per entry
  • Unlimited diary saves
  • Full correction details (explanation, vocabulary, practice drills)
  • All correction styles incl. Native
  • Follow / Feed / Reactions
  • Mini Lesson Preview after each correction
Most popular

Plus

$9/month

  • 5 AI corrections / day
  • 500 characters per entry
  • Everything in Free
  • Mini Lesson Library โ€” all 20 lessons

Pro

$19/month

  • 10 AI corrections / day
  • 500 characters per entry
  • Everything in Plus
  • Mini Lesson Review Drills (AI-generated)
Coming soon

Teacher

$49/month

  • Personal feedback from Tetsu-sensei
  • Everything in Pro
  • Limited spots

Payments aren't live yet โ€” this is a public beta. Pricing may change before launch.

Your first diary is waiting.

Write one sentence in Japanese today. Obie will take it from there.