Terms of Service

Effective date: 2026-08-04

These Terms of Service (these "Terms") set out the conditions for using the Shopify app "MYDO - AI Customer Service Assistant" (the "Service") provided by Hiroki Yanase (sole proprietor; the "Operator"). By installing the Service, the user (the operator of a Shopify store; the "Merchant") is deemed to have agreed to these Terms. These Terms constitute standard terms (teikei yakkan) under Article 548-2, paragraph 1 of the Civil Code of Japan and apply to all relations between the Operator and the Merchant concerning use of the Service.

Article 1 (The Service)

1. The Service connects the Merchant's LINE Official Accounts (two accounts: one customer-facing, one for owner notifications) with the Merchant's Shopify store and, for both replies to customer inquiries and messages the Merchant sends to a customer first (together, "Messages"), generates AI drafts and sends them after the Merchant's approval. Messages the Merchant sends to a customer first can only be addressed to customers who have added the Merchant's customer-facing LINE Official Account as a friend and have previously contacted that account. The Service provides no broadcast function for sending to customers indiscriminately.
2. Every newly AI-generated Message draft — whether a reply or a message the Merchant sends to a customer first — is sent to a customer only after the Merchant's prior approval (via LINE or the web admin). Instant responses using canned answers the Merchant has previously approved and registered (automatic replies) are an exception.
3. The Operator may change, add to, or discontinue the Service with prior notice. However, if the Operator ends provision of the Service in its entirety, it will announce this in the app or by notice to Merchants at least 30 days before the end date.
4. If the Merchant so chooses, the Service forwards what arrives at the Merchant's customer-facing LINE Official Account, exactly as it arrived from LINE, to a destination the Merchant specifies (such as another tool the Merchant has been using) ("Relay mode").

Article 2 (Eligibility and Accounts)

1. The Service is available to businesses that hold a valid Shopify store and are not in breach of Shopify's terms of service.
2. The Merchant shall, at its own responsibility, prepare two LINE Official Accounts and complete the setup in the LINE Developers console (obtaining channel access tokens, channel secrets, etc.).
3. Credentials and store information the Merchant enters into the Service must be accurate.
4. At the Merchant's request, the Operator may guide the Merchant through the setup described in the preceding two paragraphs over a video call with screen sharing.
In that case the Merchant still performs the setup itself, and the Operator does not take custody of or record the Merchant's passwords or credentials, and does not record the call.

Article 3 (Fees and Billing)

1. The Service offers a free plan and several paid plans. Fees for a paid plan are a fixed monthly or annual fee, charged through Shopify together with the Merchant's Shopify bill. If the Merchant chooses annual billing, a discount applies to the fixed fee. Fees do not increase or decrease with the number of messages sent. The name, specific fees and discount rate of each plan are those displayed in the app or on Shopify's plan selection screen.
2. Each plan includes an allowance of messages sent to customers per month (from the 1st to the last day of each month, Japan time) (the "included messages"), except plans with an unlimited number of messages. Messages are counted as the number of sends from the customer-facing LINE Official Account multiplied by the number of recipients. Notifications to the owner-notification LINE Official Account, instant automatic replies using canned answers the Merchant has previously approved and registered, and messages the Merchant sends from the LINE Official Account's own screens without going through the Service are not counted. The included messages for each plan are as displayed in the app.
3. Exceeding the included messages incurs no additional fee and does not restrict sending. In that case, until the last day of that month, the AI's drafts switch to a simplified version (the "simplified drafts"), and return to normal drafts on the 1st of the following month. The Operator does not warrant that simplified drafts are of the same quality as normal drafts. Additional included messages cannot be purchased.
4. If usage substantially exceeds the included messages, or if abusive use is suspected, the Operator may temporarily stop AI generation of drafts or contact the Merchant individually. Even while AI generation of drafts is stopped, automatic replies using canned answers remain available, and the Merchant may still write or edit the message text themselves and send it.
5. Feature requests from Merchants on a plan with an unlimited number of messages are considered ahead of requests from other plans ("priority handling"). This concerns the order in which requests are considered only; it is not a guarantee that any particular request will be implemented, nor of any implementation or response deadline.
6. The Operator may offer a period during which a paid plan can be tried free of charge (the "trial period"). No fee for that plan is charged during the trial period. The eligible plan, length and number of trials, and what happens when the trial period ends (whether the Merchant returns to the free plan or billing for the paid plan begins), are as displayed in the app or on Shopify's approval screen when the trial period is started.
7. The Operator may change the pricing plans on reasonable grounds. Changes applying to existing Merchants will be announced in advance in the app or by notice.
8. Fees already paid are non-refundable except as required by law. Proration and adjustment of charges upon cancellation or plan change in the middle of a billing period follow the handling of Shopify's billing system.

Article 4 (Merchant Responsibilities and Prohibited Conduct)

1. The Merchant bears final responsibility for reviewing AI-generated Message drafts and deciding whether to approve and send them. The Operator makes no warranty as to the accuracy of AI suggestions.
2. The Merchant is responsible for ensuring that content sent through the Service complies with applicable laws (e.g. consumer-protection, advertising, and pharmaceutical regulations) and with the respective terms of service of LINE and Shopify. The same applies to messages the Merchant sends to a customer first; in every case the sender of a Message to a customer is the Merchant, and the Operator merely provides the means.
3. The Merchant shall not:
- reverse engineer, decompile, or copy the Service;
- use the Service to send unlawful content or content contrary to public order and morals;
- place excessive load on the systems of the Service or of third parties (Shopify, LINE, OpenAI, Anthropic, etc.);
- improperly obtain or use account information of other Merchants or third parties;
- engage in any other conduct the Operator reasonably determines to interfere with the proper operation of the Service.
4. The Merchant shall, by stating it in its own store's privacy policy or by other means, give the notices and make the disclosures required by law, and obtain any consent required, for its customers' ("End Users'") information to be handled through the Service.
5. If a dispute or claim arises between the Merchant or the Operator and an End User or other third party out of content the Merchant sent through the Service, or out of the Merchant's breach of these Terms or of law, the Merchant shall resolve it at its own responsibility and expense and shall compensate the Operator for any resulting loss, except where the cause is attributable to the Operator.

Article 5 (Data Handling)

1. The handling of Merchants' and End Users' personal information is governed by the separate Privacy Policy. The Operator handles End Users' personal information as a party entrusted with that handling by the Merchant.
2. The Operator uses information the Merchant registers with or sends to the Service, and the exchanges with End Users ("Merchant Data"), only to provide the Service to that Merchant, and does not use it to provide the Service to other Merchants or to train AI models (such as language models). The Service's feature that saves notes (AI memory) from exchanges is used only to create drafts for that Merchant and does not conflict with this restriction.
3. The Service sends part of the Merchant Data to AI providers (OpenAI, Anthropic) through their APIs, for example to create drafts. The Operator uses these APIs under terms whereby the content sent is not used to train the providers' AI models.
4. As between the Operator and the Merchant, rights to use AI-generated drafts, and Messages the Merchant edits and sends from them, belong to the Merchant, and the Operator asserts no rights in them. However, the same or similar content may be generated for other users, and the Merchant is not guaranteed exclusive rights.
5. Forwarding in Relay mode is performed by the Operator on the Merchant's behalf and on the Merchant's instructions.
The choice and configuration of the destination, any contract with the destination's provider, and the handling of information once it reaches the destination are matters between the Merchant and that provider, and the Operator bears no responsibility for them.
The Merchant shall also cover the forwarding of End Users' information to the destination in the notices, disclosures and consents required under Article 4(4).
The Merchant may stop Relay mode at any time, after which the Operator does not forward anything to the destination.

Article 6 (Intellectual Property)

1. Intellectual property rights in the software, designs, and other elements of the Service belong to the Operator or its rightful licensors.
2. Rights in shop-specific knowledge the Merchant registers with the Service (product documents, FAQs, etc.) belong to the Merchant.

Article 7 (Suspension and Interruption)

The Operator may suspend or interrupt all or part of the Service without prior notice to Merchants in any of the following cases, while endeavoring to give advance notice where possible:

1. system maintenance or inspection;
2. force majeure such as earthquake, fire, power outage, or other natural disasters making provision of the Service difficult;
3. interruption, change, or termination of external services the Service depends on (LINE, Shopify, OpenAI, Anthropic, etc.);
4. any other case in which the Operator determines suspension or interruption to be necessary.

Article 8 (Disclaimer of Warranties; Limitation of Liability)

1. The Service is provided "as is." The Operator makes no warranty that the Service will fit any particular purpose, operate without interruption, or that AI-generated content will be free of errors. Because of the nature of machine learning, AI-generated drafts may contain content that is untrue, incomplete, or inconsistent with the Merchant's intent or store policies.
2. The Operator is not liable for damages arising from use of, or inability to use, the Service suffered by the Merchant or End Users, except in cases of the Operator's willful misconduct or gross negligence.
3. Where the Operator is liable for damages, except in cases of its willful misconduct or gross negligence, its liability is limited to direct and ordinary damages actually incurred by the Merchant (excluding lost profits and other damages arising from special circumstances) and is capped at the fees the Merchant paid to the Operator in the calendar month in which the event giving rise to the claim occurred.
4. Because the Service includes AI-generated content, nothing in these Terms relieves the Merchant of its duty to verify the accuracy and lawfulness of content before deciding to send it.
5. Results of measuring how the shop appears in AI answers are a rough guide, obtained by asking external AI services under set conditions. The Operator makes no warranty that the shop will appear in, or be recommended by, external AI answers, or that the results will match the answers the Merchant's customers see.
6. The Operator is not liable for any failure to provide all or part of the Service caused by outages, specification changes, or changes in the terms of external services the Service depends on (LINE, Shopify, OpenAI, Anthropic, etc.), or by natural disasters, war, failure of telecommunications lines, or other events beyond the Operator's reasonable control ("force majeure"). Fees are not reduced for any period during which the Service could not be used for these reasons.
7. The Operator does not warrant that forwarding in Relay mode reaches the destination without delay or without omission, or that the destination's tool works as intended with the forwarded content.
Forwarded content may not reach the destination while the Service is suspended or interrupted, or if the destination remains unable to receive it.

Article 9 (Termination)

1. The Merchant may stop using the Service at any time by uninstalling it from the Shopify admin.
2. The Operator may stop providing the Service to a Merchant without prior notice if the Operator determines the Merchant has breached these Terms.
3. Data handling upon uninstall (termination of use) is as set out in the Privacy Policy. Because Merchant Data is deleted after uninstall as Shopify requires, the Merchant shall keep its own copy of any information it needs before uninstalling. The Operator has no obligation to retain Merchant Data beyond the retention periods set out in these Terms and the Privacy Policy, or to provide the Merchant with backups of Merchant Data.
4. Article 3(8), Article 4(5), Article 6, Article 8, Article 9(4), and Articles 11 through 15 survive the end of use of the Service.

Article 10 (Changes to These Terms)

1. Pursuant to Article 548-4 of the Civil Code of Japan, the Operator may amend these Terms without the individual consent of Merchants if:
- the amendment conforms to the general interest of Merchants; or
- the amendment does not contradict the purpose of these Terms and is reasonable in light of the necessity of the amendment, the appropriateness of the amended content, and other circumstances relating to the amendment.
2. When amending these Terms, the Operator will announce the amended content and its effective date on this page and in the app or by notice to Merchants, a reasonable period before the effective date (for material changes that are disadvantageous to Merchants, in principle 30 days).
3. Continued use of the Service by the Merchant on or after the effective date constitutes agreement to the amended Terms.

Article 11 (Exclusion of Anti-Social Forces)

1. The Merchant represents and warrants that neither it nor any of its officers is now or will in the future be an organized crime group, a member of one, a person for whom five years have not passed since ceasing to be a member, a quasi-member, a related company, a corporate racketeer, a racketeer purporting to be a social movement, a special intelligence violence group, or any similar person (collectively, "Anti-Social Forces"), and that it has no socially reprehensible relationship with Anti-Social Forces.
2. The Merchant shall not, itself or through a third party, make violent or legally groundless demands, use threatening words or violence, or damage the Operator's credibility or obstruct its business by spreading rumors, fraud, or force.
3. If the Merchant breaches either of the preceding paragraphs, the Operator may immediately, without any demand, stop providing the Service to the Merchant and terminate the agreement under these Terms, and is not liable for any resulting loss to the Merchant.

Article 12 (Confidentiality)

1. The Operator treats Merchant Data as confidential and does not disclose it to third parties except as provided in these Terms and the Privacy Policy, with the Merchant's consent, or as required by law.
2. The Merchant shall not disclose to third parties, without the Operator's prior consent, any non-public technical or business information of the Operator learned through the Service, nor use it for any purpose other than using the Service.

Article 13 (No Assignment)

1. The Merchant shall not assign, transfer, or pledge its position or rights and obligations under these Terms to a third party without the Operator's prior written (including electronic) consent.
2. If the Operator transfers the business relating to the Service to a third party (including succession of the business upon incorporation), it may transfer its position, rights and obligations under these Terms, and Merchant Data, to the transferee, and the Merchant consents to this in advance. In that case the Operator will announce it in advance in the app or by notice to Merchants.

Article 14 (Notices, Severability, and Language)

1. The Operator gives notices to the Merchant by display in the app, by email to the Merchant's contact address (the one registered with Shopify or the one the Merchant specified in the admin), by message to the owner-notification LINE Official Account, or by other means the Operator deems appropriate. A notice is deemed to have reached the Merchant when the Operator sends or displays it.
2. If any provision of these Terms is held invalid or unenforceable under law, the remaining provisions continue in full force and effect.
3. These Terms are written in Japanese, and this English version is a translation for reference. If the Japanese and English versions differ, the Japanese version prevails.

Article 15 (Governing Law and Jurisdiction)

1. These Terms are governed by the laws of Japan.
2. Any dispute arising in connection with the Service shall be subject to the exclusive jurisdiction of the Japanese court having jurisdiction over the Operator's place of business as the court of first instance.

Article 16 (Contact)

For inquiries about these Terms, please contact:

Operator: Hiroki Yanase
Contact: support@mydoai.com