The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Anime (16 members)
- Anime Images (16 members)
- Apollo Productions (3 members)
- Article stubs (0 members)
- Blog posts (0 members)
- Candidates for deletion (0 members)
- Cast (4 members)
- Characters (33 members)
- Design templates (0 members)
- Disambiguations (0 members)
- Episodes (12 members)
- Female (15 members)
- Four Shida Sisters (5 members)
- Hardy Pro (5 members)
- Harem (3 members)
- Help (0 members)
- Hozomino High School (14 members)
- Image Gallery (8 members)
- Images (6 members)
- Infobox Templates (1 member)
- Light Novel Images (32 members)
- Light Novel Volumes (8 members)
- Locations (4 members)
- Main Characters (6 members)
- Main Page templates (13 members)
- Male (6 members)
- Manga Chapters (13 members)
- Manga Images (10 members)
- Manga Volumes (3 members)
- Media (43 members)
- Minor Characters (7 members)
- Music (4 members)
- Organizations (4 members)
- OsaMake Wiki (17 members)
- Pages with broken file links (1 member)
- People (4 members)
- Policies and Guidelines (5 members)
- Relationships (8 members)
- Songs (1 member)
- Spin-Off Volumes (1 member)
- Subpages (2 members)
- Supporting Characters (15 members)
- Template documentation (32 members)
- Templates (62 members)
- Templates/Context-link (6 members)
- Templates/Infobox (7 members)
- Templates/Navbox (1 member)
- Templates/Notice (1 member)
- Templates/Quote (2 members)
- Theme Images (8 members)