Yes you can by adding an email address at [New Registration] after going to [Setting] > [Account Information] > [Notification Setting].
Notification contents such as about 'In-stock', 'shipment' can be set individually for each registered email address.
As well as the additional email address, you can also add your sub-account.
Click on [New Registration] then input the required fields on ‘Edit notification setting’ screen.
To update the registered information, click on the user.
*The input fields for the procedures above are the same.
*To delete, click the trashcan icon.