Purpose of collection and use of personal information
① Use of a self-identification service based on service use
② Communication of notices and secure channels of communication
③ Other matters for the provision of smooth, high-quality services, etc.

Items of personal information to be collected
① Name, email address, IP information and other optional items

Period of retention and use of personal information
① Information submitted by the author himself/herself can be deleted immediately when the post is deleted, and collected personal information is not deleted.