To get to your "Manage Plan" page, please follow the directions below.
※If this is your first time logging into your Sakura Mobile Portal account, please visit here
First, please log in to your My Sakura Mobile account
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.