Legal information

1. Service description

Mainichi Nihongo ("the Service") is a browser-based Japanese-learning application. It provides lessons, spaced-repetition review, a library of learning items, and related features.

2. Accounts & eligibility

You must provide a valid email address to create an account. You are responsible for keeping your sign-in credentials confidential and for all activity under your account.

You must be at least 13 years old (16 where required by local law) to create an account.

3. Free trial & payment

New accounts include a 7-day free trial. After the trial, continued access requires a one-time purchase. Payments are processed by Stripe; we never see or store your card number.

The price is US$24.99 as a single one-time payment. There is no subscription, no recurring charge, and no automatic renewal. Your purchase includes one year of updates from the date of purchase. After that year you may continue to use the Service at no additional cost for as long as we continue to operate it. This is not a guarantee of perpetual or indefinite availability. If we discontinue the Service, we will give reasonable advance notice by email or in the app, and, where a purchase was made within the preceding year, we will offer a remedy (such as a refund, a pro-rated refund, or an equivalent alternative) appropriate to the circumstances.

4. Acceptable use

You agree not to misuse the Service: no attempts to disrupt it, scrape it at scale, probe or bypass security or paywalls, or use it for anything unlawful.

One purchase grants access to one account; sharing an account or reselling access is not permitted.

5. Intellectual property & independence

The Service's software, design, and original learning content are the property of the operator. Lesson material references third-party works for educational commentary and recommendation only.

This is an independent Japanese-learning service. It is not affiliated with or endorsed by any anime studio, manga publisher, game company, or VTuber agency.

6. Disclaimers & limitation of liability

We provide the Service with reasonable care, but we do not warrant that it will be uninterrupted, error-free, or that every item of learning content is free of mistakes. The Service is an educational tool and does not guarantee any particular learning outcome, test result, or proficiency level.

To the extent permitted by law, our total liability for any claim relating to the Service is limited to the amount you actually paid us for it. We are not liable for indirect or consequential loss.

Nothing in these terms limits or excludes liability that cannot be limited or excluded by law — including liability for death or personal injury caused by negligence, for fraud, or for our own intentional misconduct or gross negligence. If you are a consumer, these terms do not affect your mandatory statutory rights.

7. Governing law & consumer rights

These terms are governed by the laws of Japan, and the Tokyo Summary Court or Tokyo District Court (depending on the amount in dispute) shall have jurisdiction as the court of first instance.

If you are a consumer, this does not deprive you of the protection of mandatory consumer-protection rules of the country where you habitually reside, nor of any right you may have under those rules to bring proceedings in the courts of your own country. EU, EEA and UK consumers may also use the EU Online Dispute Resolution platform where applicable.

8. Changes to these terms

We may update these terms from time to time. Material changes will be announced in the app or by email before they take effect.

9. Provider information

Please contact us at the email address given in the provider information.

Our registered address and telephone number are disclosed without delay upon request to the contact address above. Prices are shown in US dollars; depending on your country, applicable consumption tax, VAT or GST may be added or included as indicated at checkout.

10. Contact

For legal questions, contact us at support@rewrite-co.com.

The service lets a monitored person tap a button once a day and shares that record with their family. It does not guarantee health, safety, or survival; it does not detect emergencies; it never contacts third parties automatically.

Subscribers must be 18 or older. A monitored person starts using the service only after personally agreeing on the consent screen shown at first launch of their device.

Prohibited: using the service as a substitute for medical, security, or welfare guarantees; registering someone without their consent.

Pricing is the Basic plan billed annually (Japan: ¥980/year tax included) with automatic renewal. We email you 30 and 7 days before renewal. Cancel anytime on the web — no phone call required — and keep access until the end of the paid period.

Governed by Japanese law; exclusive venue is the Tokyo District Court or Tokyo Summary Court (without limiting consumers' statutory home-jurisdiction rights).

Article 1 (Nature of the service) This service stores text messages written by a living user and delivers them by email to recipients designated by the user when the user is presumed deceased. This service and the messages created or delivered through it have no legal effect.

Article 2 (Distinction from a legal will) 1. This service does not create a legally valid will of any kind (including a notarized, holographic, or sealed will). 2. No message created or delivered through this service gives rise to any legal effect, including inheritance, bequests, estate division, recognition of a child, disinheritance of an heir, or the appointment of an executor. Nor does this service amend, revoke, or supplement a legal will. 3. To realize legally binding intentions, such as the disposal of property, please consult a lawyer, judicial scrivener, notary, or other qualified professional. The operator does not provide legal advice or assistance with the preparation of wills. 4. The operator does not convert your input into any legal form and does not guarantee that recipients can use a message as a legal will. 5. This article clarifies that the service is not a legal will; it does not exempt the operator from liability for delivery failure, information leakage, mistaken delivery, or similar events.

Article 3 (Eligibility) This service is available only to users aged 18 or older (or the age of majority in your country of residence, if higher). By registering recipient or emergency contact information, you represent and warrant that you have the authority to do so, including the consent of the individuals concerned.

Article 4 (Subscription, auto-renewal, and cancellation) 1. The Basic plan is a yearly subscription with automatic renewal. Pricing is fixed per country and shown on the pricing page. 2. You can check your next renewal date and cancellation deadline anytime on the Billing page. 3. You may cancel online at any time. Cancellation takes effect at the end of the current period: you keep access until then, auto-renewal stops, and no further charges are made. 4. We notify you by email at your registered address before each renewal. 5. If we change our prices, we will notify you in advance by email or on the site before the change takes effect. 6. If a renewal payment fails, we will notify you by email and you can complete the payment again within a 90-day grace period. Your data is kept during the grace period.

Article 5 (Refunds) 1. Payments are fully refundable within 14 days. Please contact us via our support desk. 2. After 14 days, refunds or prorated refunds are generally not available. 3. This article does not affect any statutory right of cancellation, withdrawal, or refund, or any other consumer rights you may have. 4. Refund details are set out separately on the “Refund, Retention & Delivery Policy” page.

Article 6 (Check-ins and delivery conditions) 1. Users respond to periodic check-in emails at the configured interval. 2. If there is no response, we deliver messages only after a multi-stage confirmation process consisting of reminders, an emergency-contact check, a final warning, and a final grace period. 3. The operator does not verify death using official documents. Delivery is determined through a process based on unanswered confirmation emails and checks with your emergency contacts.

Article 7 (Nature of delivery) 1. Delivery of a message does not mean that the recipient has received, opened, or understood it. Messages may not arrive due to the recipient's refusal to accept them, an invalid email address, spam filtering, or similar reasons. 2. We make reasonable delivery efforts, automatically retry on failure, and record delivery outcomes, but we do not guarantee the recipient's receipt, opening, or actions. 3. We take reasonable measures to prevent mistaken delivery, but we do not guarantee that it can never happen. 4. This article is not a blanket exemption: as a core obligation of this service, we owe you a duty to make reasonable efforts to deliver your messages.

Article 8 (Prohibited content and use) You must not include the following in messages or use the service for the following purposes: (1) passwords, credit card numbers, private keys, or similar confidential credentials; (2) threats, harassment, defamation, or discriminatory content; (3) instructions for illegal acts, confessions to or solicitation of crimes, or content that encourages suicide or harm to others; (4) improper disclosure of a third party's personal information or secrets; (5) content that infringes copyright or other intellectual property rights; (6) sexually exploitative content or content harmful to children; (7) malware or malicious links; (8) any representation that a message constitutes a legal will; (9) fraudulent content, such as coercing the transfer of property or demanding payment of money from recipients; (10) content that unduly intimidates or distresses recipients. If a violation is confirmed, we may delete the message, suspend delivery, or suspend the account. Please note that we do not proactively monitor all messages in advance.

Article 9 (Intellectual property) Copyright and other intellectual property rights in messages belong to the user. The operator uses them only to the extent necessary to provide the service (such as reproduction for storage and delivery).

Article 10 (Subscription after the user's death) After a user's death, we accept cancellation of the subscription upon contact from family members or other related parties. In addition, once all messages have been delivered, we will automatically cancel the subscription effective at the end of the current subscription period, and no charges will be made for any subsequent renewal date. If renewal charges were incurred after the user's death, please contact our support desk; we will review the circumstances and respond on an individual basis.

Article 11 (Termination of the service) 1. If we discontinue the service, we will, wherever possible, notify you multiple times at your registered email address and announce it on the site at least 6 months in advance. 2. We will provide an opportunity to export all data. 3. We will refund a prorated amount corresponding to the subscription period remaining as of the termination date. 4. Messages cannot be delivered after the termination date. The data deletion date and the deletion of backups will be explained in the termination notice. 5. In urgent circumstances — such as a security incident, a response to a legal violation, the emergency suspension of a third-party service, or a disaster — we may suspend all or part of the service without prior notice. 6. We recommend that you keep your own separate copies of important data, for example by using the export feature.

Article 12 (Disclaimers and limitation of liability) 1. We are not liable for indirect damages, lost profits, or special damages. 2. Our aggregate liability is capped at the total amount you paid during the most recent one-year period. 3. The preceding two paragraphs do not apply in cases of our willful misconduct or gross negligence, and do not limit consumer rights that cannot be excluded by law.

Article 13 (Changes to these terms) We may amend these terms. Material changes will be notified at least 30 days before they take effect, by email to your registered address or by posting on the site.

Article 14 (Governing law and jurisdiction) 1. These terms are governed by the laws of Japan. 2. The Tokyo District Court or the Tokyo Summary Court shall have exclusive agreed jurisdiction in the first instance over disputes relating to this service. 3. The preceding paragraph does not affect any statutory right of consumers to bring proceedings in the courts of their place of residence.

What we store

• Learning data (progress, reviews, settings) is stored in your browser's local storage on your device. Clearing your browser data erases it.
• Account data: if you create an account, we store your email address (encrypted) so you can sign in and so we can contact you about your account.
• Session cookie: signing in sets a secure, httpOnly session cookie (a __Host-* cookie) used only to keep you signed in.
• Payment: purchases are processed by Stripe. We never see, transmit, or store your card number.

What we don't do

• No advertising, no third-party trackers, no analytics beacons.
• We do not sell, rent, or share your personal data with third parties for marketing.

Who processes your data

We use a small number of service providers to run the Service. They process data only on our instructions and only for the purposes below:

• Stripe — payment processing. Stripe receives your payment details directly; we receive only a payment reference, amount and status.
• Cloudflare — hosting, content delivery, database storage and bot protection.
• Resend — sending account emails (verification, password reset, notices).

International transfers & legal basis

The operator is based in Japan, and the providers above operate global infrastructure, so your data may be processed outside your country — including outside the EEA/UK. Where GDPR or UK GDPR applies, we rely on performance of the contract with you (providing the Service, sign-in, purchase and support) and on our legitimate interests in keeping the Service secure, and transfers are made under the safeguards offered by those providers (such as standard contractual clauses). Japan has an adequacy decision from the European Commission.

How long we keep it

Account records are kept while your account exists and are deleted promptly when you delete it; residual copies in encrypted backups expire within 30 days. Payment records are retained by us and by Stripe for the period required by tax and accounting law. Learning data lives only in your browser and is never uploaded.

Your rights & deletion

You can delete your account and all associated server-side data at any time from Settings → Account → Delete account. Local learning data can be erased from Settings → Reset all data, or by clearing your browser storage.

Account deletion removes your server-side account record promptly; residual copies in database backups expire within 30 days. Where GDPR or similar laws apply, you also have the rights of access, rectification, portability, and objection — contact us to exercise them.

Contact

For privacy questions, contact us at support@rewrite-co.com.

Data we collect: email address (stored encrypted), check-in records (date and kind only), device label. We never use location, camera, or microphone.

Check-in history is kept for 12 months and then deleted. Login attempt records are deleted after 90 days.

You can export your data or request account deletion anytime from Settings.

International data transfers: data is stored and processed in Cloudflare data centers, which may involve transfers outside your country; we apply appropriate safeguards required by applicable laws.

1. Data we collect: sender (user) data (email address, display name, country of residence, language, time zone), recipient and emergency contact data (name, email address, relationship, language), message bodies (stored encrypted), billing data (payments are processed by Stripe; we never store card details — we keep only the customer ID and billing history), and technical data (logs such as IP addresses and login history).

2. Encryption of messages: message bodies are encrypted with AES-256-GCM. They are never readable in plaintext in the database, including by the operator.

3. Storage location and international transfers: data is stored and processed in Cloudflare data centers, which may involve transfers outside your country of residence. We apply appropriate safeguards as required by applicable law.

4. Processors: Stripe (payment processing — billing data), Resend (email delivery — recipient addresses and the content of delivered emails), and Cloudflare (hosting — service operation data, including encrypted data). Using these providers may involve data transfers to their respective regions.

5. Recipient and emergency contact data: this information is registered on the premise that the user has the authority to register it, including the consent of the individuals concerned. Individuals registered as recipients or emergency contacts may request the deletion or correction of their own data.

6. No AI training on message content: message bodies are never used to train or improve AI models.

7. No open tracking: we do not track whether delivered emails are opened.

8. Purposes of use: providing the service (message storage, check-ins, delivery), billing management, support, security, and legal compliance. We do not use personal information for advertising, and we do not sell personal information.

9. Retention: data is kept for the duration of the subscription plus 180 days after cancellation, then deleted. Scheduled deletions are notified in advance. You can export your data anytime. Audit logs never contain message bodies or personal information.

10. Your rights: you may request access to, correction of, or deletion of your personal information, as well as data portability (the right to receive your data in a structured, commonly used, machine-readable format and to transmit it to another provider), restriction of processing, and objection to processing. The exercise of these rights may be subject to limitations and exceptions provided by law. We verify your identity before responding and answer requests within 30 days in principle. Contact: support@rewrite-co.com. In addition, users in the EU/EEA and the United Kingdom have the right to lodge a complaint with the data protection supervisory authority of their country of residence (in the UK, the ICO: Information Commissioner's Office).

11. Data breach response: if a personal data breach occurs, we will assess the impact, notify affected individuals, and report to the competent authorities, in accordance with applicable law.

12. Cookies: we use only cookies that are strictly necessary for authentication and security.

13. Changes: material changes will be notified at least 30 days before they take effect, by email or on the site.

Price (annual): JP ¥980 / US $9.99(before tax) / GB £7.99 / CA CA$12.99(before tax) / AU A$14.99 / KR ₩9,900 / CN 39元 / TW NT$249 / ID Rp59.000 / VN 89.000₫ / TH ฿169 / MY RM19.90. All prices include tax except those marked "before tax". Payment: credit card (Stripe). Charged at signup and each renewal. Service is available immediately after payment.

Cancellation: anytime from the web (no phone call). Access continues until the end of the paid period.

Free trial cancellation

Every new account includes a 7-day free trial. You can cancel at any time during the trial — simply let it expire or delete your account. You will never be charged for the trial; no payment method is required until you decide to purchase.

Refund window

If you are not satisfied with your purchase, you may request a refund within 14 days of the purchase date. This is a voluntary refund offer that we honour wherever you live.

EU / EEA / UK consumers: for digital content you normally have a statutory 14-day right of withdrawal. Because full access is unlocked immediately when your payment completes, by completing your purchase you request and consent to that immediate performance and acknowledge that you thereby lose the statutory right of withdrawal once performance has begun. Our voluntary 14-day refund offer above applies in any event, so you are not left worse off.

Nothing on this page limits your statutory rights where the Service is faulty, is not as described, or does not conform to the contract, nor any mandatory consumer-protection right in the country where you habitually reside.

If we discontinue the Service

Your purchase includes one year of updates and continued access for as long as we operate the Service; it is not a guarantee of perpetual availability. If we discontinue the Service, we will give reasonable advance notice and, where you purchased within the preceding year, offer a remedy appropriate to the circumstances (such as a refund, a pro-rated refund, or an equivalent alternative).

How to request a refund

Contact us at support@rewrite-co.com from the email address associated with your account, and include your purchase date or receipt.

Processing

Refunds are issued through Stripe to the original payment method. Depending on your bank or card issuer, it may take 5–10 business days for the refund to appear on your statement.

Cancellation: cancel anytime from web Settings. No phone call is required and nothing obstructs cancellation. You keep access until the end of the paid period; we do not prorate refunds.

Refunds: billing errors caused by us (duplicate charges, charges after cancellation) are refunded in full. In addition, within 14 days of payment we refund in full — contact us at support@rewrite-co.com. After 14 days, refunds and prorated refunds are generally not available (this does not limit any statutory withdrawal or refund rights).

This policy summarizes how refunds, data retention, and message delivery are handled. Please also review the Terms of Service and the Privacy Policy.

【Refunds】

Payments are fully refundable within 14 days. Contact us via the contact form or our support desk (support@rewrite-co.com).

Duplicate or accidental purchases are also covered by the 14-day full refund.

If a serious defect means the service is not provided as contracted, we will review the circumstances and respond individually.

If delivery fails or a message is delivered by mistake, we will retry and investigate. Whether a refund is available depends on the circumstances.

If we discontinue the service during your subscription period for our own reasons, we will refund a prorated amount corresponding to the period remaining as of the termination date.

After a user's death, we accept cancellation upon contact from family members or other related parties. In addition, once all messages have been delivered, the subscription is automatically cancelled effective at the end of the current subscription period, and no further renewal charges are made. Renewal charges already incurred after death are reviewed and handled individually upon contact from family members or other related parties.

Refunds may not be available if a recipient refuses to accept delivery or if death cannot be confirmed.

Prorated refunds after 14 days from payment are generally not available.

This policy does not affect any statutory right of cancellation, withdrawal, or refund, or any other consumer rights you may have.

【Data retention】

Data is kept for the duration of the subscription plus 180 days after cancellation, then deleted. Scheduled deletions are notified in advance.

You can download your data — including message bodies — as JSON anytime using the export feature.

If you delete your account yourself, your data is deleted immediately.

【Message delivery】

Messages that meet the delivery conditions are sent once and automatically retried on failure. Delivery history is recorded.

We do not track whether delivered emails are opened.

Delivery does not guarantee receipt by the recipient. We recommend telling your recipients the service name and sender address in advance and asking them to keep the emails out of their spam folder.

We recommend keeping your own backup of important content.

The only cookie we set is the login session cookie (HttpOnly, Secure, SameSite=Lax). We do not use advertising or behavioral-tracking cookies.

We do not use analytics at this time (if introduced, we plan to use cookieless Cloudflare Web Analytics and will update this page).

This service does not determine or guarantee a person's health, safety, survival, death, or emergency status.

A completed check-in does not guarantee that the registered person is healthy or safe. A missed check-in does not necessarily indicate illness, injury, death, or an emergency.

Notifications or check-ins may fail because of missed reminders, device problems, browser or operating-system settings, network failures, service outages, or other circumstances.

This service does not automatically contact emergency services, medical providers, security companies, or public authorities. In an emergency, contact the appropriate local emergency number or another responsible person directly.

A check-in only indicates that an action was performed using a registered device. It does not guarantee that the registered person personally performed the action.

Example: the notification your family receives if a check-in is missed: Today's check-in has not been completed. This may be due to a missed reminder, device or network issue, or another reason. Contact the person directly if appropriate.

This service is not a legal will. Messages created or delivered through this service have no legal effect, including inheritance, bequests, or the disposal of property.