About udoon
What is udoon?
udoon (formerly Fujisan.AI) is a study app for the Japanese-Language Proficiency Test (JLPT), from N5 to N1. It works on the web and on Android, in 8 languages. It is made in Tokyo by language-education experts at TORAIZ Inc.
What can you study?
- JLPT Drill Practice — 25,000+ questions across vocabulary, kanji, and grammar. Multiple skill types: meaning, reading, writing, reverse translation, and sentence completion. Every question follows the JLPT format.
- Full-Length Mock Tests — 100 complete JLPT mock tests with 9,300+ questions. Exam mode with real time limits or practice mode at your own pace. HD audio for all listening sections.
- Daily Reading — A fresh Japanese article every day, matched to your JLPT level. Read with furigana support, toggle translations, and test comprehension with quiz questions.
- AI Conversation Practice — Practice everyday Japanese conversations with udoon, your AI conversation partner. Each day the app picks a topic — self-introductions, restaurants, shopping, directions, or travel — and shows the goals and the words to use. Answer by speaking or typing.
- AI Learning Coach — Your personal AI tutor analyzes your strengths, weaknesses, and study patterns. Get specific guidance on what to focus on next to improve fastest.
- Spaced Repetition — Built-in SRS automatically schedules reviews at optimal intervals. Track your mistakes and practice them until mastered. Never forget what you learned.
How does payment work?
Every new account can use everything free for 3 days. To keep learning after that, buy the JLPT Exam Pass for the exam you are taking.
A one-time payment for the JLPT session you're taking. It unlocks every feature — drills, mock tests, conversation practice, daily reading, and AI coaching — until the day after that exam.
The pass does not renew, so there is nothing to cancel. The price depends on your country or region and is shown on the purchase screen.
Can I try it for free?
Yes. New accounts can use everything free for 3 days from registration — the full course, mock tests, AI conversation and Daily Reading. All you need is an account. After that, you need the exam pass to keep learning. Your progress is kept.
Who makes udoon?
udoon is made by TORAIZ Inc., a language-education company in Tokyo.
- Company
- TORAIZ Inc. (トライズ株式会社)
- Representative
- Yuki Miki (三木 雄信)
- Address
- 2-12-9 Shibadaimon, Minato-ku, Tokyo 105-0012, HF Hamamatsucho Building 6F, Japan / 〒105-0012 東京都港区芝大門 2 丁目 12 番 9 号 HF 浜松町ビルディング 6 階
Is udoon an official JLPT app?
No. udoon is an independent study app and is not affiliated with the organizers of the JLPT (the Japan Foundation and Japan Educational Exchanges and Services). The questions and mock tests are original practice material written in the JLPT format.
Contact
Email: support@udoon.ai