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Japan Porting

The following topics are discussed in this guide:

 

In Japan we offer porting for the following number types:

Number type Number type prefix Capabilities:
Toll-Free +81-800
+81-120
Voice


Twilio is excited to announce the launch of Japan 0ABJ local numbers. To facilitate this, Twilio has developed Port In API designed to transfer existing Japan 0ABJ Local Numbers (such as Tokyo 03, and Osaka 06 numbers) from your current provider to Twilio. This API will enable the creation and management of both individual and bulk ported orders.
Interested in accessing the new Port In API? Please complete this form.

 

Twilioは、日本の0ABJローカル番号のポーティングを開始しました!これに伴い、既存の日本の0ABJローカル番号(東京03や大阪06など)を現在のプロバイダーからTwilioへスムーズに移行できるPort In APIを開発しました。
このAPIを利用することで、個別および一括でのポートイン注文の作成と管理が可能になります。
Port In APIへのアクセスをご希望の方は、ぜひ以下のフォームにご記入ください。

 

Porting requirements

*per number type

TOLL-FREE

Requirements

Description

 

LOA (Letter of Authorization) * in Japanese

Must be signed by the authorized user and/or owner of the number(s).

Note that the information on your porting form (LOA) must match the authorized user name and service address provided by your current carrier. 

Ensure that following information is added:

  • Numbers to be ported
  • End user address, same as on the current provider records
  • Date, signature

You will be required to send the original physical LOA to Twilio's Carrier partner, when your current provider approves the port.

 

Account SID

Your unique ID starting with “AC” that you can find on the main dashboard in Twilio Console.
 

JP phone number regulations

To upload your documents please select

“Phone Numbers” > “Regulatory Compliance“ > “Bundles”

in your console menu or just follow the link: https://www.twilio.com/console/phone-numbers/regulatory-compliance/bundles

 

Choose the country, phone number type and follow the instructions. Processing of the compliance documents may take up to several business days.

 

Once your documents have been accepted, please share the associated links that start with "BU" and "AD" along with the porting request.

Restrictions

We only can port up to 25 phone numbers per day. If you have more than 25 numbers, the remaining numbers will be completing the day after. 

Porting process 

  1. Submit your porting request with all the requirements in place via this submission form. 
  2. Twilio validates the port request. If everything in Step 1 is correct, you can expect Twilio to approve your port request within 24 business hours.
  3. Twilio submits the number to the Carrier Partner. This can take up to 24 business hours.
  4. Twilio’s Carrier Partner reaches out to the current provider. Your request is submitted to your soon-to-be former service provider as a port request. During this time, do not close your account with your service provider and keep your numbers active. This can take around one week to complete.
  5. Response from the carrier. At this point, your request is either approved or rejected:
    • Approved: If approved, Twilio will notify you about a porting date. 
    • Rejected: Rejections can occur due to various reasons. For example, invalid VAT Number or invalid/incomplete range of numbers. Read more about common reasons for port request rejections below. Rejections may add an undetermined amount of time to your porting request.
  6. Twilio reaches out to you with a porting date. Twilio emails you with a porting date and time slot if known. Your number is on your Account and can be visible in the Twilio Console.
  7. Configure your number. It is critical to configure your number prior to the porting date. This will minimise the service downtime. You can configure the numbers from the Twilio Console.
  8. Your phone number is with Twilio. Once your number is routed to Twilio and everything works as expected, you can remove the number from your former provider.

Timelines

Depending on complexity of the port, we can complete your port request within the approximate time frames listed below:

Toll-Free +81-800
+81-120
3-4 weeks


In case you wish to expedite your request please reach out to your current provider to confirm you are porting your number away from their service and to Twilio.

If the current provider rejects your port during the porting process, additional time may be added once the rejection is resolved.

Common rejections

There are a number of factors that can delay port orders. Below is a list of the most common rejection reasons and how to address them. In each case, we would need to resolve the rejection to be able to proceed with the port.

Rejection Explanation How to solve the rejection
Unauthorised signatory LOA (Letter of Authorisation) is signed by an unauthorised individual
  1. LOA must be signed by the authorised user and/or owner of the number. 
    1. Update the signature and send the document to Twilio to resume your porting request
Inactive number Numbers are not currently in service with your current provider and/or you have outstanding charges on the account
  1. Contact your current provider to reinstate the number
    1. Once this is done, let Twilio know to resume your porting request

Unfortunately, we cannot contact your current service provider on your behalf. For security reasons, your current service provider will naturally refuse to provide us with your private and confidential information. 

For a more summarised view of porting requirements, please visit our guidelines page here

Additional Information

Ministry of Internal Affairs and Communications: oversees the Japanese administrative system, manages local governments, elections, telecommunication, post, and governmental statistics.

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