Edgar Rice Burroughs’s “A Princess of Mars.”
Counterpoint: Galaxy Quest.
More counterpoints: Superman, Super Mario Bros, Dragonball, Lilo and Stitch, The Amazing Digital Circus, Spirited Away, Back to the Future, Homestuck, Hercules, Undertale, The Matrix, Fern Gully, Harry Potter, Genshin Impact
While I agree with this in spirit, technically isekai means another world, and the world that Ash was sent to was our world in the past.
I don’t remember the Necronomicon from history class ;-)
Thank Ash for that 🙏
So, if we’re looking at isekai in spirit. I think Futurama would be included as a good example.
Oh, Final Fantasy X too. Although gray area.
My favourite Isekai is the story of Jesus Christ, who came from Heaven to “another world” called Earth
I Was Reborn In Another World And My Dad Turned Out To Be God, Now I Have To Die For Everyone’s Sins. Also, My Dad Is Me?