The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Assassin Killer Arc Chapters (5 members)
- Battles (0 members)
- Blog posts (1 member)
- Candidates for deletion (0 members)
- Chapters (56 members)
- Chapters by Volume (1 member)
- Characters (23 members)
- Community (1 member)
- Data Templates (2 members)
- Data templates (1 member)
- Disambiguations (0 members)
- Documentation templates (1 member)
- Female Characters (5 members)
- General wiki templates (18 members)
- Hatnote templates with errors (0 members)
- Image license templates (13 members)
- Images (4 members)
- Infobox templates (14 members)
- Intro Arc Chapters (6 members)
- Items (1 member)
- Main Page Templates (5 members)
- Maintenance (6 members)
- Male Characters (15 members)
- Manga (8 members)
- Media (4 members)
- Navbox templates (1 member)
- Notice templates (10 members)
- Okutabi Lab Arc Chapters (13 members)
- Order Member (4 members)
- Pages using ISBN magic links (2 members)
- Pages with broken file links (2 members)
- Quote templates (2 members)
- Real-World Articles (1 member)
- Sakamoto Days Wiki (7 members)
- Screenshots (0 members)
- Story Arcs (7 members)
- Stubs (0 members)
- Sugar Park Arc Chapters (7 members)
- Template documentation (58 members)
- Templates (15 members)
- Templates/Infobox (1 member)
- Unattributed files (0 members)
- Videos (0 members)
- Volume 1 Chapters (7 members)
- Volume 2 Chapters (9 members)
- Volumes (5 members)
- Wiki skin images (2 members)