>>145669171>Do you think that Death Note is an isekai? How about Azumanga Daioh?The "othering" of the other world is the part that makes an isekai important. Death Note, for instance, has an afterlife but that's not something that Light directly interacts with. The emphasis is on the note book, not the world it came from. If Ryuk were the MC or central focus and the story was from his perspective, that would make it an isekai since that manifests the "othering". I'm not sure what you're talking about with azumanga, though.
>Kagome literally moves there and has a family, and is unable to returnKagome and Inuyasha both travel between modern Japan and ancient Japan several times in the series. They just stopped doing it after the first few seasons.
>A story that incorporates "another world" in the title or premise is not necessarily in the GENRE "another world".My brother in Christ, get a clue.
You're completely misunderstanding what makes an isekai an isekai. They call it that in the name because it's overtly a commentary on the genre.