Sender ID Restrictions
| Can I send with a name/letters as the sender? | No | The sender will be overwritten to a long code |
| Can I send with an international number as the sender? | Yes | |
| Can I send with a local number as the sender? | No | The sender will be overwritten |
| Can I send a message with over 160 characters as 1 SMS? | No | Message will be delivered as separate messages |
Content Restrictions
| Delivery Reports |
Unfortunately delivery reports from Japanese numbers are unreliable and can be fake. |
| URLs |
It is not allowed to add URLs in your messages. Any messages that contain a weblink are classified as illegal and are either discarded completely or a part of the illegal text will be removed. |
| Character Support |
Because Japanese characters are not supported by the regular character set, messages with Japanese characters can contain a maximum amount of 65 (single message) |
Operator-Specific Restrictions
| DoCoMo | A maximum of 160 bytes/160 standard characters per SMS applies |
| Softbank | A maximum of 160 bytes/160 standard characters per SMS applies |
| KDDI | A maximum of 100 bytes/100 standard characters per SMS applies |