Japan (JP)

Locale name

Japan

ISO code
The International Organization for Standardization two character representation for the given locale.

JP

Region

Asia

Mobile country code
A three digit code associated with the given locale and used in conjunction with a Mobile Network Code to uniquely identify mobile networks.

440

Dialing code
The dialing prefix used to establish a call or send an SMS from one locale to the given locale.

+81

Two-way SMS supported
Whether Twilio supports two-way SMS in the given locale.

Yes

Number portability available
Whether number portability is available in the given locale.

Yes

Twilio concatenated message support
Concatenation refers to the capability of splitting a message that is too long to be sent in one SMS into smaller pieces and then joining the pieces at the receiving end so that the receiver sees the message as one. 

Yes*
For certain sender ID types this may not be supported. Where messages are split and rejoined may vary based on character encoding.

Message length
How many characters can be sent given a particular message encoding before the message will be split into concatenated segments.

160 characters

Twilio MMS support
Multimedia Messaging Service (MMS) provides a standards-based means to send pictures and video to mobile phones.

Not Available

Sending SMS to landline numbers
How Twilio handles an SMS message destined for landline telephone number.

You cannot send SMS to a landline destination number: the Twilio REST API will throw a 400 response with error code 21614, the message will not appear in the logs, and the account will not be charged.

Compliance considerations
Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. This table lists some general best practices.

Twilio provides SMS delivery services to Japan via two distinct gateways: International and Domestic.

For the International gateway:

• There's no need for registration.
• Both dynamic longcodes and alphanumeric sender IDs are supported.

For the Domestic gateway:

• Registration is mandatory.
• Messages wil be delivered using either a longcode or a shortcode.
• Customers have the option to select either a dedicated or shared sender ID.

Sending firearms, gambling, adult content, money/loan, lead generation, Text 2 Pay, political, religious, controlled substance, cannabis, and alcohol related content is strictly prohibited. Phone numbers in message content is not allowed.

Message delivery to M2M numbers is on best-effort basis only.

Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. The following are some general best practices:

1. Get opt-in consent from each end user before sending any communication to them, particular for marketing or other non-essential communications.
2. Only communicate during an end user's daytime hours unless it is urgent.
3. SMS campaigns should support HELP/STOP messages, and similar messages, in the end user's local language.
4. Do not contact end users on do-not-call or do-not-disturb registries.

Operator network capability
Whether mobile operators in the given country support the feature.

Not Required

Required

Supported

Twilio supported
Whether Twilio supports the feature for the given country.

Not Supported

Supported
Learn more and register via the Console

Supported
Learn more

Sender ID preserved
In some countries sender IDs for certain sender types are not preserved and are changed for compliance and/or deliverability reasons. In these countries mobile subscribers will see a different ‘from sender ID’ than the one sent by you.

N/A

No

Yes

Provisioning time
Provisioning is the process of getting the sender ID approved and registered with mobile networks (depending on country requirements). Provisioning time is how long this process takes in the given country.

N/A

5 weeks

N/A

UCS-2 support

N/A

Supported

Supported

Use case restrictions

N/A

SMS message to the KDDI network in Japan with over five (5) segments may experience delivery delay due to a network limitation on KDDI Japan's platform.

Best practices

N/A

Operator network capability
Whether mobile operators in the given country support the feature.

Supported

Supported

Supported

Twilio supported
Whether Twilio supports the feature for the given country.

Not Supported

Supported

Not Supported

Sender ID preserved
In some countries sender IDs for certain sender types are not preserved and are changed for compliance and/or deliverability reasons. In these countries mobile subscribers will see a different ‘from sender ID’ than the one sent by you.

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Yes

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Provisioning time
Provisioning is the process of getting the sender ID approved and registered with mobile networks (depending on country requirements). Provisioning time is how long this process takes in the given country.

N/A

N/A

N/A

UCS-2 support

N/A

Supported

N/A

Use case restrictions

N/A

N/A

N/A

Best practices

N/A

SMS message to the KDDI network in Japan with over five (5) segments may experience delivery delay due to a network limitation on KDDI Japan's platform. International Numeric Sender Id would also be prepended with 010 (eq 01044XX) as per KDDI Japan policy

N/A