Japan SMS Features and Restrictions
Country Summary
| Country Name | Japan |
| ISO | JP |
| Country Code | 81 |
| Region | Asia |
| MCC (Mobile country code) | 440 |
Sender ID Guidelines
| Alphanumeric Sender ID |
Alphanumeric sender IDs are supported. |
| Numeric Sender ID | Numeric sender IDs will be overwritten to ensure delivery. |
| Generic Sender ID | Generic sender IDs such as INFO, SMS, NOTICE etc are prohibited. |
Use-Case & Content Guidelines
| Message Content with URL Links | There are preventive measures by Japanese networks against phishing SMS that may affect delivery of messages with URL links. The Japanese networks will not disclose their rejection criteria. |
| Concatenated Unicode Message | The maximum length/characters for unicode messages is 670 full-width characters for Docomo, KDDI, and Softbank networks, and 660 full-width characters for the Rakuten network. |
| Marketing Traffic | Before sending any marketing traffic, opt-in consent is required from handset users. |
Additional Information
P2P traffic is prohibited.
No political, religious, unsolicited promotion, or gambling content.
There are no additional content restrictions beyond those in our Acceptable Use Policy.
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