Terms of Use — English reference translation

1. Purpose of the App

The App provides experiences of encountering and immersing yourself in Japanese. It does not guarantee specific learning outcomes, passing an examination or reaching a particular language ability. It is not intended to award scores or judge answers as correct or incorrect.

2. Fees and subscriptions

All features, including Phase 0, require a paid subscription. The monthly price is JPY 4,500, including tax, with automatic monthly renewal.

There is no free trial period. The monthly charge begins when the subscription application process is completed.

Without a subscription, you may access the service introduction, pricing information and legal notices.

Payments for the web version are made through Stripe, and Stripe’s terms and cancellation procedures apply. Payments for a future mobile version will be made through the App Store or Google Play, with the relevant store’s terms and cancellation procedures.

One subscription allows paid features to be used simultaneously on up to three devices or browsers. When use begins on a fourth device, the earliest registered device — the device first used to purchase or complete the email-based transfer process — loses access. That device can regain access by completing the transfer process with the email used for the purchase.

See the notice under Japan’s Act on Specified Commercial Transactions for further details of the price and renewal period.

3. Cancellation, refunds and deletion of data

You can cancel your subscription at any time from the ‘わたし’ section of the App. After cancellation, paid features remain available until the end of the current paid period.

When the subscription period ends, community (‘ひろば’) posts stored on the server — text, images, stamps and comments — are deleted. Data stored locally on your device remains there.

Because the service supplies digital content, returns and refunds are generally unavailable after you begin using it. For an incorrect charge or technical problem, contact the address below. The operator will respond in good faith.

4. AI-generated material

AI transcription, text generation and synthesized speech can be inaccurate. Do not use them for important decisions involving medicine, law, finance or official procedures. You are responsible for your use of generated material.

5. User posts in the community

Community posts must not include unlawful content or content contrary to public order and morals; content infringing another person’s privacy, copyright or image rights; discriminatory, violent or sexually explicit content; or commercial promotion and spam.

You are responsible for what you post. The operator may delete posts that it determines violate these restrictions.

6. Intellectual property

Copyright in the App’s content, including text, audio, images and interface, belongs to the operator or the relevant rights holder. Reproduction, modification or redistribution beyond private use is prohibited.

You retain copyright in your community posts. The operator may use them to the extent necessary to provide, improve and operate the App.

7. Prohibited conduct

The following are prohibited: misuse of the App or excessive requests that attack or overload its servers; reverse engineering to extract API keys or misuse third-party services; abuse of AI features to create unlawful or harmful material or impersonate others; conduct contrary to law or public order and morals; and infringement of third-party rights.

When a violation is identified, the operator may restrict all or part of the service without advance notice.

8. Changes to or discontinuation of the service

The operator may change, add or remove features, or discontinue the App itself, for technical, economic, legal or other reasons. Important changes will be announced in advance in the App and at public URLs.

If the service is discontinued, the remaining portion of the subscription period will be refunded.

9. Disclaimer

The App is provided as is. To the extent permitted by applicable law, the operator is not liable for damage arising from use of, or inability to use, the App.

When third-party services such as Stripe, OpenAI or Google Cloud are used through the App, the relevant third party is responsible for its own terms, outages and malfunctions.

10. Exclusion of antisocial forces

You represent and warrant that, now and in the future, you are not a member of an organised crime group, an associate or affiliated business of such a group, a corporate racketeer, a group claiming to conduct social or political activities to engage in antisocial conduct, a special-intelligence organised crime group, or an equivalent person or group (collectively, ‘antisocial forces’).

You also represent and warrant that antisocial forces do not control your management, are not substantially involved in it, and are not being used by you.

If any of these conditions is found to apply, the operator may stop your use of the service and terminate the agreement without advance notice. The operator accepts no liability for damage to you arising from this action.

11. Use by minors

In Japan, an application for a paid service by a minor generally requires consent from a person with parental authority. Minors must obtain their guardian’s consent before using the App.

12. Amendments

These Terms may be revised as needed. Important revisions will be announced in the App and at public URLs. Continuing to use the App after a revision constitutes agreement to the revised Terms.

13. Governing law, jurisdiction and contact

Governing law: Japanese law. The Fukuoka District Court has exclusive agreed jurisdiction as the court of first instance.

Operator: 飛ノ庭 (Hinoniwa). Representative: 横田佑華. Contact: [email protected].

Address: 〒812-0011 福岡県福岡市博多区博多駅前1－23－2 ParkFront博多駅前１丁目 5F-B.