noun
this world; this life; the land of the living
Often contrasted with あの世 (the afterlife). Used in both everyday and literary contexts.
See also: あの世
この世に生まれてきたことに感謝している。
I'm grateful to have been born into this world.
彼はこの世を去った。
He passed away (left this world).
あの世 refers to the afterlife or the next world, while この世 refers to this world or the present life.
Compound of この (this) and 世 (world, age). The kanji 此 is a rare ateji for この.