Japan

Sender ID Restrictions

Can I send with a name/letters as the sender? No The sender will be overwitten 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