Terms and Conditions – SIM Card (Voice + Data)

Terms and Conditions – SIM Card (Voice + Data)

Last updated: March 2, 2026

By requesting, receiving and/or using the SIM Card (voice + data), the customer declares that they have read and agree to these Terms and Conditions.

1. Service

The service consists of providing a SIM card with voice (calls) and mobile data for use in Japan, according to the chosen plan.

2. Plans and monthly fees

The values ​​below refer to the monthly plan fee (in Japanese yen – JPY):

  • 1GB – ¥3,980/month
  • 20GB – 7,980 GBP/month
  • 50GB – ¥8,980/month

Prices may be adjusted due to price list updates, promotions, or changes in operational costs, with notice posted on the website and/or sent via message.

3. Initial fee and first period charge

  • Initial fee (事務手数料): ¥3,000
  • 1 advance payment: This is charged at the beginning of the contract (prepayment of the first monthly period).
  • Due date: Payment is due 30 days after the customer receives the SIM card .

4. Delivery and activation (開通)

  • Delivery time: 3 to 15 business days after the submission and validation of documents.
  • Automatic activation: the system activates/opens the line when the customer receives the SIM card . From that moment on, the service is considered active and billing occurs even if the customer does not use it .

5. Minimum period, automatic renewal and cancellation

The customer can sign up for plans with a loyalty period (最低利用期間) of 12, 24, or 36 months , as chosen in the order.

  • Loyalty period: 12, 24 or 36 months.
  • Automatic renewal (自動更新): at the end of the contracted period, the plan is automatically renewed for the same period (12/24/36 months), maintaining the current conditions.
  • Cancellation request (解約申請): must be made 1 month prior to the end of the period.

Examples:

  • 12-month plan: request in the 11th month to cancel in the 12th month .
  • 24-month plan: request in the 23rd month to end in the 24th month .
  • 36-month plan: request in the 35th month to end in the 36th month .

6. Late termination/fine (違約金)

In case of cancellation:

  • Before the end of the loyalty period (12/24/36 months), or
  • Outside the correct timeframe (less than 1 month in advance),

A termination fee may be charged, equivalent to the monthly payments required to terminate the contract, according to the terms of the contracted plan and/or applicable loyalty balance.

7. Calls and SMS

  • Unlimited calls (かけ放題): available for domestic calls in Japan, except for special numbers such as 0570 , 0800 , and other specific numbers/services.
  • SMS to +81 (Japan): ¥10 per SMS sent.
  • International SMS: ¥100 per SMS sent.

Recommendation: avoid using SMS. Use SMS only to receive verification codes and use apps (LINE, WhatsApp, WeChat, etc.) for messaging.

8. Documents and eligibility

To complete your order, you must send a photo of the front and back of one of the following documents:

  • Japanese driver's license (front and back), or
  • Zairyu Card (在留カード) (front and back).

Passports are not accepted for this service.

9. Default and restrictions

  • In case of delay, outstanding payments, or default , the service may be suspended .
  • The client acknowledges that outstanding payments may result in being added to restriction lists/blacklists .

10. Support

We only provide support via message (we do not offer phone support).

 SMS: 080-2260-5050
 WhatsApp: https://wa.me/818022605050
 LINE: https://line.me/ti/p/6jkPTAZLHq
 Email: salles@kaizenholdingjapan.com

11. Configuration (APN) and requirements

  • After the SIM card is shipped, the customer will receive the APN configuration manual via email.
  • On iOS (iPhone) devices, it is recommended to set up a connection to Wi-Fi .

12. Changes to these Terms

We may update these Terms for operational, technical, or legal adaptation. The current version will be the one published on this page.

13. Applicable law

These Terms are governed by the laws of Japan, unless otherwise provided by law.