Do you mean Isekai, but novels from the West? I'm pretty sure 3 of those books were on Goodreads Isekai lists, but if you try to look for Isekai it's not what your first hits will be...

It's portal-quest fantasy (hero goes into a fantasy world) or intrusive fantasy (the fantasy world intrudes on the hero's world), but I don't think I've ever seen those just commonly thrown around outside of academic or fantasy nerd circles.