Premium Membership is a paid service for Niconico users.
With Premium Membership, you have access to additional content and features that work on any device, including smartphones, tablets, and web browsers.
Learn more about Premium Membership benefits at the following link:
Premium Membership Benefits (Japanese)
[NOTE]
Premium membership and paid channel subscription are different services and they both provide different benefits. You cannot change your Premium membership to a paid channel subscription and vice versa. Please not that we do not grant refunds for any subscription services.