Sender ID

Alphanumeric Sender IDs are supported. Numeric Sender IDs will be changed to a generic Sender ID "NXSMS" to ensure delivery.

Sender ID with operators name are restricted: KDDI, Softbank, NTT, Rakuten Mobile. Any Sender ID starts with UQ (including Uq, uQ, and uq) are restricted towards KDDI.

Content

Gambling related content are not supported towards all Japan networks. Messages classified as illegal by the local networks are either discarded completely or the part of the illegal content will be removed.

Preventive Measures Against Phishing SMS

There are preventive measures by Japan networks against phishing SMS that may affect delivery of messages with URL link. The Japan networks will not disclose their rejection criteria.

Unicode

Japanese characters unicode SMS are supported, and for other languages it depends on the handsets.

Concatenated Messages

Concatenated messages are supported to all networks.

The maximum length/char for unicode messages is 670 full-width characters for Docomo, KDDI, Softbank, and 660 full-width characters for Rakuten.

Other Features or Restrictions

Delivery Receipts

Network level delivery receipts are supported.

Additional Information

For more information, see the following articles:

• Global SMS Features Overview (Outbound-Only)
• Global SMS Numbers Features Overview