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Japan - Messaging Regulations

Last Updated: Jun 12, 2018 12:21PM UTC

General Information:

  • Handset delivery supported
  • Concatenated (long) messages supported
  • Delivery to ported numbers supported

Supported Traffic Types:

One Time Passwords (OTP)    YES
Alerts, Reminders, Notifications (ARN)    YES
Marketing (MKT)    YES

Supported SenderID Types:

Alphanumeric    Yes*
Short Code    Yes**
Local Long Code    Yes***
International Long Code    Yes***
*Alphanumeric originators can be used only with international routes; These are filtered on 3G phones on KDDI
**Available only on Softbank with local routes
***KDDI adds prefix 010 to each numeric senderID via international routes

Content Restrictions:

  • Sending two or more messages with the same content to the same phone number within one day can lead to the filtering or blocking of traffic if a complaint is filed by the recipient.
  • Maximum 100 messages (with a different content) can be sent to the same phone number in a day.
  • Arabic characters are not supported.

Maximum Message Length:

Encoding Used Single Message Long Message
UCS-2 (for Japanese characters) 70 67 (per message)
ASCII (Latin alphabet + special characters)          160 153 (per message)

Forbidden Content Topics:

  • Politics 
  • Social Security
  • National Secrets
  • Adult or Otherwise Inappropriate Content
  • Panic Spreading
  • Gambling

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