← Back to home

Terms of Service

v1.9.0 — Effective October 16, 2026

1. Acceptance of Terms

By accessing or using udoon ("Service"), you agree to be bound by these Terms of Service. If you do not agree, do not use the Service.

2. Description of Service

udoon is a Japanese language learning platform available as a website and an Android application. It provides structured learning content for JLPT N5-N1 levels, practice questions, mock tests, AI conversation practice with voice input, daily reading, and progress tracking. New accounts can use all features free of charge for 3 days from registration. After that, a paid JLPT Exam Pass (or an existing subscription) is required.

3. Eligibility

You must be at least 13 years old to use the Service. If you are under 18, you must have parental or guardian consent.

4. Account Registration

You must provide accurate information when creating an account. You are responsible for maintaining the confidentiality of your login credentials.

5. Purchases and Payment

  • JLPT Exam Pass: A one-time purchase for a specific JLPT exam session. It gives full access to the Service until the end of the day after that session's exam date (Japan Standard Time). It does not renew automatically and does not include a free trial. The price is shown before you complete the purchase.
  • Web Payments: Purchases on the website are processed by Stripe.
  • Android App Payments: Purchases in the Android app are processed by Google Play Billing. Pricing may vary by region.
  • Existing Subscriptions: Subscription plans are closed to new sign-ups. Existing subscriptions automatically renew at the end of each billing period until you cancel through your account settings (web) or Google Play subscriptions (Android).
  • Cancellation: Existing subscriptions can be cancelled at any time through your account settings (web) or Google Play subscriptions (Android), and access continues until the end of the billing period. The JLPT Exam Pass is a one-time purchase, so there is nothing to cancel.

6. Refund Policy

All payments, including the JLPT Exam Pass, are non-refundable except where required by law.

7. Prohibited Conduct

  • Share your account with others
  • Copy, distribute, or reproduce content from the Service
  • Attempt to circumvent security measures
  • Use automated tools to access the Service
  • Use the Service for any unlawful purpose

8. Intellectual Property

All content is owned by TORAIZ Inc. or its licensors and protected by copyright laws.

9. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" WITHOUT WARRANTIES OF ANY KIND. WE DO NOT GUARANTEE SPECIFIC LEARNING OUTCOMES OR JLPT EXAM RESULTS.

10. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, TORAIZ INC. SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES.

11. Governing Law

These Terms shall be governed by the laws of Japan. Any disputes shall be resolved in the Tokyo District Court.

12. Contact

For questions about these Terms: support@udoon.ai

TORAIZ Inc. — Tokyo, Japan

13. Auto-Renewal Disclosure

This section applies to existing subscriptions, which are closed to new sign-ups. Existing subscriptions automatically renew at the end of each billing period and continue until you cancel through your account settings (web) or Google Play subscriptions (Android). You will be charged the then-current subscription fee for each renewal cycle. The JLPT Exam Pass does not renew.

14. Specified Commercial Transactions Act

For details on the seller, pricing, payment timing, cancellation methods, and other commerce-related disclosures, please see our Specified Commercial Transactions Act page (特定商取引法に関する表記). Specified Commercial Transactions Act

15. Content You Create and Share

  • You are responsible for the content you create in the Service, such as the names of your word lists and the words, readings, meanings, and notes you add yourself.
  • If you share a word list using the Service's sharing feature, you allow us to store it and show it to anyone who opens your link. Sharing a list this way is not prohibited by Section 7.
  • Do not create or share content that is unlawful, harassing, hateful, discriminatory, sexual, or violent, that encourages self-harm, that infringes the rights of others, that contains personal information, or that advertises or links to other services.
  • We check shared lists automatically before they are shared. We may refuse to share a list, or stop sharing it, if we believe it breaks these Terms.
  • Other users can report a shared list to us. We review reports, and if we believe a list breaks these Terms, we may stop sharing it and stop you from sharing that list again.
  • If you make your profile public, you allow us to show your display name, profile icon, timeline of activity, and shared word lists to anyone who opens your profile link and to learners near you on the course map. Your display name must follow the same rules as the content you share.

16. Stamps

  • Stamps are awarded automatically based on your learning records. Which stamp you receive is chosen at random, and we show the chances in the app.
  • Stamps have no monetary value and cannot be bought, sold, exchanged, or transferred.
  • We may change how stamps are awarded. We may also stop showing some stamps, such as limited-time or partner stamps, when their period ends.