To get to your "Manage Plan" page, please follow the directions below.

※If this is your first time logging into your [Sakura Mobile My Page], please visit here

First, please log in to your [Sakura Mobile My Page] 

1) Select the contract you would like to manage (Refer to ① in the images below)

2) Select "Contract details" (Refer to ② in the images below) 

3) You will then be able to see the manage plan page.