Nihongo Diary
Education
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Nihongo Diary — Write Japanese every day. Get it corrected. Keep going.
Writing is the fastest way to make Japanese stick — but only if someone corrects you, and only if you keep showing up. Nihongo Diary gives you both.
WRITE & GET CORRECTED
- Write a short diary entry in Japanese — any level, any length
- AI correction shows your corrected text in seconds, with furigana on every kanji
- See a natural, native-like version of what you wrote
- Understand every fix with clear explanations, key mistakes, and vocabulary
- Ask the community: real learners (and their corrections) alongside AI
YOU'RE NOT DOING IT ALONE
- Share entries to the community feed and cheer each other on
- Get corrections and comments from fellow learners around the world
- Follow friends, react to entries, and reply to comments
- Push notifications remind you to write and tell you when someone responds
KEEP YOUR STREAK ALIVE
- Daily streaks and milestones keep you motivated
- Calendar view of everything you've written
- Word-tap translation while reading other learners' entries
- Obie, your study buddy, celebrates your progress
Made by Tetsu, a native Japanese teacher in Sapporo, for learners who want to actually use their Japanese — not just study it.
Free to start. Write your first entry today.
Terms of Use: https://nihongodiary.app/terms
Ratings & Reviews
Bug fixes and improvements. Added a Restore Purchases button.
The developer, Tetta Taguchi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tetta Taguchi
- Size
- 17.3 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
User-Generated Content
- In-App Purchases
Yes
- Pro (Yearly) $159.99
- Plus (Yearly) $79.99
- Pro $19.99
- Plus $9.99
- Copyright
- © 2026 Tetsu Sensei's Japanese Class