Japan

The key details for mobile messaging in Japan are below. We have full one-way reach to all mobile operators in this region. For a datasheet that contains more information, such as best practices and the proportion of subscribers on each mobile operator, please contact us.

See help for an explanation of each field.

Region

Eastern Asia

Dialing Code

81

1-way

Yes

2-way

Long Code Only

2-way Setup Time

3

Primary Character Encoding

SHIFTJIS / UCS-2

Max Characters for Single-part message

70*

Multi-part messages

Yes*

Delivery Receipts

Yes

Mobile Number Portability

Yes

Alphanumeric Originator maintained on 1-way

No, variable

Alphanumeric Originator Registration required

Alphanumeric not supported

Short Code maintained on 1-way

Overwritten

Local Long Code maintained on 1-way

Overwritten

International Long Code maintained on 1-way

Overwritten

* Notes

All message Originators will be overwritten by a local Long Code (NTT DOCOMO and KDDI (au)) or Short Code (SoftBank) on OpenMarket's standard 1-way product. Multipart messages up to 332 bytes (157 UCS-2 chars, 315 GSM7 chars) are supported on NTT DoCoMo and Softbank and can be supported on KDDI (au) if required.

Guidance / Restrictions

Campaigns need to be registered, Opt in required for marketing SMS, No spam. Opt out procedure advised. Networks generally block messages with URL's or phone numbers within the message. AU/KDDI subscribers can request to have this block removed from their acounts