Inspired by comments from 10 Most Rewatchable Shonen Anime Series, Ranked
Here are a few examples that I know of:
| title | expected | actual |
|---|---|---|
| Frieren | non-shounen (seinen?) | shounen |
| Attack on Titan | seinen | shounen |
| The Apothecary Diaries | shoujo | seinen |
| Umamusume: Cinderella Gray | shounen | seinen |
| 100 Girlfriends | shounen | seinen |
What are other instances of misidentified demographic you have seen?
Quick and dirty definitions of anime demographics:
- shoujo - girls
- shounen - boys
- josei - ladies
- seinen - men


I cannot remember the title off the top of my head, but I remember reading about at least one manga that changed the magazine it was originally serialised in to reach a different market segment.
Disagree. I found it useful.
After watching a substantial amount of anime, I noticed - based on my AniList stats - that I enjoy seinen anime more than those of shounen and shoujo. (You can guess which demographic I am a part of.)
This made it easier for me to seek out anime that fit my taste - though it certainly is a self-reinforcing loop.
I’d still check shounen / shoujo anime out; they simply have a higher bar to clear.
Vinland Saga did this. There are others, but that’s the one that comes to mind.