Last updated: 15 July 2026
Terms and Conditions of Use and Sale
These terms govern the use of the mobile-companion.com website and the purchase of our eSIM plans. By placing an order, you accept them without reservation.
1. Purpose and publisher
These General Terms and Conditions of Use and Sale (the "Terms") govern the provision of the website and the sale of data plans in the form of eSIMs by:
Japan Companion 合同会社 (Japan Companion GK)
1-23-14 Jinnan, Shibuya-ku, Tokyo 150-0041, Japan — 法人番号 7011003024086
support@mobile-companion.com
2. Service description
Companion Mobile provides a Japanese eSIM (digital SIM card) giving access to a data-only plan on the 4G/LTE network of the Japanese operator IIJ, with a native Japanese IP address. The service includes neither calls nor SMS. Ensuring your device is compatible is your responsibility; a checker is available on the plans page.
3. Customer account
Some features require creating an account. You agree to provide accurate information and to keep your credentials confidential. Special accounts (influencer, travel agency) are subject to an application and to our approval.
4. Ordering and pricing
Plans range from 1 GB to 50 GB, starting at €0.98. Prices are shown in euros. Payment is made online via our secure provider Stripe (Visa, Mastercard, American Express, as well as Apple Pay and Google Pay). The order is confirmed by an email containing your installation QR code.
5. Delivery and installation
The installation QR code is delivered by email immediately after payment is validated. You can install the eSIM before departure; it will activate on your arrival in Japan.
6. Activation and validity
The plan's validity period (7 or 30 days depending on the offer) starts at the first connection to the Japanese network, not at the time of purchase. If your data runs out before the end of the validity period, an additional plan can be purchased at any time; it is added to the existing eSIM.
7. Withdrawal and refund
The eSIM constitutes digital content / a digital service. You acknowledge and accept that performance of the service begins as soon as the eSIM is installed on your device.
30-day satisfied-or-refunded guarantee
A full refund is possible within 30 days of purchase only if the eSIM has not been installed (QR code not scanned and eSIM not added to a device).
No refund once the eSIM has been installed
Scanning the QR code and adding the eSIM to a device mark the start of performance of the service and entail the waiver of any refund request, whether the eSIM was activated or not, and whether the data was used or not.
For any eligible refund request, contact us at support@mobile-companion.com quoting your order number.
8. Referral, affiliate and agency programs
The referral program lets you accumulate points usable to purchase eSIMs. The influencer and agency programs, available on request and approval, grant commissions and dedicated features. Commissions, thresholds, withdrawals and terms are specified in the relevant areas. We reserve the right to suspend or cancel any benefit in the event of abuse, fraud or non-compliance with these Terms.
9. User obligations
- Use the service and the site lawfully and in accordance with these Terms.
- Do not resell eSIMs without being expressly authorized (reseller/agency accounts).
- Do not attempt to defraud the referral or affiliate programs.
- Check the compatibility and unlocked status of your device before purchase.
10. Liability
We provide the service with the utmost care. Coverage and speeds nonetheless depend on the IIJ operator's network and may vary by location and congestion; this is an obligation of means. We cannot be held liable in the event of device incompatibility, misuse, or temporary unavailability beyond our control. Nothing in these Terms excludes our liability where the law prohibits it.
11. Intellectual property
All content on the site is protected. See the legal notice (mentions légales).
12. Personal data
The processing of your data is described in our Privacy Policy.
13. Governing law and disputes
These Terms are governed by Japanese law. Any dispute falls under the jurisdiction of the Tokyo courts (Japan). The mandatory consumer-protection provisions of the user's country of residence, where they cannot be waived by contract, remain applicable.
14. Amendment of the Terms
We may amend these Terms at any time. The applicable version is the one in force on the date of your order. Any question can be sent to support@mobile-companion.com.