If you are changing your course between different fiber-optic services, you can continue to use the Fixed IP Address Option.
If you are changing to a course of any other services, please apply for the Fixed IP Address Option in accordance with the course you wish to change to.

You will be informed through an email in the following cases:
・You are changing your subscription course but the use of Fixed IP Address Option continues
・You are changing to a service which does not support fixed IP address, and the Fixed IP Address Option is going to be canceled automatically

See the following pages for information on contract change for Fixed IP Address Option.
Fixed IP Address Support Page: Information related to contract change