These three anime:

  • Knight's & Magic
  • In Another World With My Smartphone
  • KonoSuba: God's Blessing on this Wonderful World.

and perhaps others anime as well begin with the common theme of a guy dying and get born on another world. That made me wonder what made this theme be present in so many anime.

I am specially focused on the death of the characters since that is, in my opinion, a different element of other isekai anime such as Sword art online. In Sword art Online the characters are truly imprisoned in a different world. In this three anime the characters die and continue their lives (are ressurected into) in a different world.

Is this kind of story present in some Japanese book? Is it just because this kind of narrative was well received? Are they anyhow related?

If possible it would be great if someone could find the first anime where this narrative was present.

  • Slightly related for answering the reason: Why all the “Re” in titles?
    – Aki Tanaka
    Mar 28, 2018 at 18:53
  • @AkiTanaka The Trapped in another world point covers it up pretty well. Although I would say there's this element of dying before being trapped which makes it somewhat different of SAO for instance Mar 28, 2018 at 19:01
  • 5
    The term of art for this genre is isekai (異世界, lit. "different world"), FYI.
    – senshin
    Mar 29, 2018 at 4:18
  • 1
    Attempting to find the first isekai is hard, you could argue about Alice in Wonderland in the literature side. The Tale of Urashima Tarou has certain aspects that could be considered isekai as well. On manga/anime, the oldest manga I found is a '76 shoujo manga about a girl sent to Ancient Egypt, Ouke no Monshou, and an '85 OVA, Genmu Senki Leda. The current trend started with the success of a bunch of isekai stories on "Syosetsuka ni Narou," I believe the most prominent being Mushoku Tensei.
    – paulnamida
    Mar 29, 2018 at 5:30
  • 1
    @AkiTanaka that'd be isekai tensei (literally reincarnation isekai).
    – paulnamida
    Mar 30, 2018 at 14:19

1 Answer 1


Thanks to paulnamida's comment, this is a sub-genre of 異世界 (isekai, "different world") called 異世界転生 (isekai tensei, reincarnation on different world).

Nicopedia (Japanese) has an exclusive entry for this genre.

According to them, the definition is


Inhabitants of the original world die, reincarnated in a different world, and start a new life.

It has existed at least since 1988 in Japan with New Story of Aura Battler Dunbine, a 3-episode OVA of Aura Battler Dunbine.

古くから存在するジャンルで、日本のアニメでも80年代後半で既に近い特徴を持った『New Story of Aura Battler DUNBINE』が登場している [...]

In the genre that has existed for a long time, in the second half of the 1980s there was a Japanese anime New Story of Aura Battler Dunbine which has similar characteristics [...].

The cause of death can be anything, but a prominent one is caused by a truck, in which it's called "truck reincarnation".


Since it's necessary to die once to have transported into another world because it's a reincarnation, there are many causes of death, like running over by a truck, getting into an accident, etc. Especially, for reincarnation after running over by a truck, it's called "truck reincarnation".

Some prominent works in this genre:

  • アルバート家の令嬢は没落をご所望です (The Daughter of the Albert House Wishes for Ruin)
  • 異世界はスマートフォンとともに。 (In Another World With My Smartphone)
  • 賢者の孫 (Kenja no Mago)
  • 公爵令嬢の嗜み (Common Sense of a Duke’s Daughter)
  • この素晴らしい世界に祝福を! (KonoSuba)
  • 転生したら剣でした (I Was a Sword When I Reincarnated)
  • 転生したらスライムだった件 (That Time I Got Reincarnated as a Slime)
  • ナイツ&マジック (Knight's & Magic)
  • 本好きの下剋上 〜司書になるためには手段を選んでいられません〜 (Ascendance of a Bookworm)
  • 無職転生 ~異世界行ったら本気だす~ (Mushoku Tensei)
  • 幼女戦記 (Saga of Tanya the Evil)

As for the reason why there are many works with this genre recently, Kevin fu's answer to a similar question would also apply here:

But the reason on why there's an influx of it being used is the fact that it currently sells when used in a light novel, manga, or anime title.


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