isekai (English)

Where does "isekai" come from?

The English term 'isekai' is a direct borrowing from the Japanese 'isekai', which literally translates to 'different world'[1]. This Japanese word is a compound formed by combining 'i', meaning 'different', with 'sekai', meaning 'world'[2]. The component 'sekai' itself traces back to Middle Chinese and was originally adopted as a translation for the Sanskrit 'lokadhātu', a term referring to a region or part of the world[3]. In modern usage, the term has evolved to describe a popular genre of fiction where ordinary individuals are transported into alternative fantasy or virtual environments[1][2].

Full etymology tree

• isekai (English), 'A genre of Japanese fiction involving everyday people transported to alternative fantasy or virtual worlds.'
  • borrowed 異世界 (isekai) (Japanese), 'another world'
    • compound 異 (i-) (Japanese), 'different, other, hetero-'
    • compound 世界 (sekai) (Japanese), 'world'
      • inherited 世界 (syejH keajH) (Middle Chinese)
        • derived लोकधातु (lokadhātu) (Sanskrit)

Ancestors

• 異世界 (Japanese)

Sources

1. isekai (English) - Wiktionary
2. 異世界 (isekai) (Japanese) - Wiktionary
3. 世界 (sekai) (Japanese) - Wiktionary

Updated August 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris