Privacy Policy

Last updated: June 24, 2026

Introduction

Japan Duo Notes (“we,” “our,” or “us”) may collect personal information and other information related to customers (“Customer Information”) when customers use our website, online store, products, or related services.

We handle Customer Information in accordance with the Act on the Protection of Personal Information of Japan and other applicable laws, regulations, guidelines, and this Privacy Policy.

Scope of this Privacy Policy

This Privacy Policy applies to all Customer Information that we collect in connection with the use of our website, online store, products, and related services.

Information We Collect

We may collect Customer Information in the following ways:

Information entered directly by customers when using our online store or related services
Information provided by customers via email, contact forms, postal mail, telephone, or other communication methods
Information collected automatically when customers access or use our website or online store

The information we collect may include the following:

Information related to purchases:

Name
Address
Telephone number
Email address
Order details
Purchase history
Payment status
Shipping information for printed products
Other information necessary for processing orders and providing customer support

Payment-related information:

Payments are processed through third-party payment service providers such as Payhip, PayPal, Stripe, and credit or debit card networks. We do not store complete credit card numbers or full payment card details on our own systems.

Information collected when using our website or services:

Products viewed or purchased
Usage history of our website or online store
Cookies and similar technologies
IP address
Device type
Browser type and language
Referring URL
Platform type
Page views
Time spent on pages
Date and time of website activity
Other technical or usage information related to our services

Information collected through inquiries or surveys:

Details of customer inquiries
Responses to surveys, if any
Feedback, requests, or opinions regarding our products or services
Other information provided voluntarily by customers

Purposes of Use

We use Customer Information for the following purposes:

Providing our products and services:

To confirm purchases and orders
To process payments and verify payment status
To deliver PDF digital products
To ship printed books
To provide customer support
To respond to inquiries, requests, or claims
To provide other services related to our online store

Improving our products and services:

To analyze how customers use our website and online store
To improve existing products and services
To plan and develop new products or services
To customize content or services where appropriate
To conduct surveys or request feedback
To improve the quality, usability, and security of our services

Communications and notices:

To contact customers regarding orders, payments, delivery, refunds, or support
To provide important notices regarding our services
To notify customers of changes to our terms, policies, or services
To respond appropriately to customer inquiries
To send information about products, services, campaigns, or updates where permitted by law or with the customer’s consent where required

Advertising and marketing:

To measure the effectiveness of advertisements and marketing activities
To improve our marketing and promotional activities
To display or deliver advertisements where applicable

Security and service management:

To verify customer information and order details
To prevent unauthorized use, fraud, or abuse
To detect and resolve violations of our terms or policies
To maintain the safety, reliability, and quality of our services
To protect the rights and interests of customers, us, or third parties

Fraud prevention and payment security:

To assist payment service providers, card issuers, and related financial institutions in detecting and preventing unauthorized or fraudulent transactions, including through security measures such as 3-D Secure where applicable

Sharing and Disclosure of Customer Information

We may share or disclose Customer Information to third parties in the following cases:

Service providers and contractors:

We may provide Customer Information to service providers and contractors to the extent necessary for order processing, payment processing, product delivery, customer support, website operation, analytics, marketing, fraud prevention, or other business operations.

Examples of such service providers may include:

Payhip
Stripe

Business partners:

We may share Customer Information with business partners or cooperating companies where necessary to provide our products or services, improve our business, conduct advertising, or measure marketing performance.

Business transfer:

If our business, website, or online store is transferred, merged, reorganized, or succeeded by another person or entity, Customer Information may be transferred to the successor to the extent necessary for the continuation of the business.

Legal requirements:

We may disclose Customer Information when required by law, regulation, court order, administrative authority, supervisory authority, or other public institution.

Dispute resolution and protection of rights:

We may disclose Customer Information if we determine that it is necessary to resolve disputes, protect the rights, property, or safety of customers, us, or third parties, or prevent fraud or unauthorized activity.

Payment security and card issuers:

For fraud detection and prevention, Customer Information such as name, telephone number, email address, billing information, and order information may be provided to the card issuer, payment processor, or related financial institution used by the customer.

If the card issuer or payment processor is located outside Japan, Customer Information may be transferred to the country where that issuer or processor is located.

Management and Security of Customer Information

We take appropriate measures to prevent loss, destruction, alteration, unauthorized access, leakage, or misuse of Customer Information.

When we entrust the handling of Customer Information to third-party service providers, we take reasonable steps to ensure that such information is handled appropriately and securely.

However, no method of transmission over the Internet or electronic storage is completely secure. We cannot guarantee absolute security.

Use of Google Analytics and Cookies

Use of Google Analytics:

Our website and related services may use Google Analytics to understand and analyze customer usage of our website.

Data collected through Google Analytics is managed in accordance with Google’s privacy policy and terms. Customers may refer to Google’s policies and opt-out tools for more information about how Google uses collected data.

Use of cookies:

Our website and related services may use cookies and similar technologies for purposes such as improving convenience, analyzing website usage, providing services, displaying advertisements, and measuring advertising effectiveness.

Cookies are small text files stored on a customer’s device when accessing a website.

Customers may restrict or refuse cookies through browser settings. However, if cookies are disabled, some parts of our website or services may not function properly.

Correction of Customer Information by Us

If information necessary for billing, payment, delivery, or customer support is incomplete, outdated, or incorrect, we may update or correct Customer Information to the extent necessary for the proper provision of our services.

Customer Rights Regarding Personal Information

Customers may request confirmation, correction, deletion, disclosure, suspension of use, or suspension of third-party provision of their personal information, in accordance with applicable laws.

Disclosure of retained personal data:

When we receive a request for disclosure of retained personal data or records of third-party provision, we will respond without delay in accordance with applicable laws, except in cases where:

Disclosure may harm the life, body, property, or other rights and interests of the customer or a third party
Disclosure may significantly interfere with the proper operation of our business
Disclosure would violate applicable laws or regulations

Correction, deletion, suspension of use, etc.:

When we receive a request for correction, addition, deletion, suspension of use, erasure, or suspension of third-party provision of retained personal data, we will confirm that the request is made by the customer or an authorized representative and respond in accordance with applicable laws.

Please note that due to technical limitations or legal requirements, we may not be able to fulfill all requests exactly as requested.

External Websites and Third-Party Services

Our website or online store may contain links to websites or services operated by third parties.

We are not responsible for the protection of personal information, privacy practices, content, or security of websites or services operated by third parties. Customers should review the privacy policies and terms of those third-party websites or services before using them.

Customer Responsibility

Customers are responsible for properly managing any information necessary to identify themselves, access their accounts, or use our services.

Customers should take care to prevent loss, unauthorized disclosure, or misuse of such information.

Changes to this Privacy Policy

We may revise this Privacy Policy from time to time.

When we make changes to this Privacy Policy, we will notify or announce the revised policy, the details of the changes, and the effective date by an appropriate method.

If customer consent is required by law for any changes, we will obtain such consent in an appropriate manner.

Customers are encouraged to review the latest version of this Privacy Policy when using our website, online store, products, or related services.

Contact

For inquiries regarding this Privacy Policy or requests concerning personal information, please contact us through the contact form or customer support information provided on this website.

Japan Duo Notes

Representative: Kan Saito