Contact us by emails

Enter the required information and click send

* Notice *
Depending on the setting regarding spam mail, the confirmation email from the KATANA MOBILE may not be received.
If you do not receive the confirmation email, please set it to allow "katanamobile.jp" to receive emails from the KATANAMOBILE email address.
For details on how to set it, contact your email service provider.


If you are Japanese, enter your name in kanji and phonetic characters. If you are a foreigner, enter your name in the Roman alphabet.

Phonetic characters

Application for restarting the service

* If you are currently suspended and wish to restart the service, please check this item. If you have already been canceled the service, you need to make a fresh application from the application form.

Email address (Required)

Customer ID

Phone number



Contact of inquiry