Kakinuma is shown to be somewhat awkward and nerdy, never really standing out much.
Kakinuma has a bowl hairstyle and wears rectangular framed glasses.
Strikethrough episodes or chapters indicate the character was mentioned but did not make a physical appearance)
Kakinuma is usually shown to be with a couple of other nerds playing video games. None of the others have been named, and not much is known about them or their relationship.