expression, noun
a memory to take to the afterlife; something that makes one feel they can die in peace
Idiomatic expression for a deeply satisfying experience or memory that one would want to carry into the next world. Often used hyperbolically for a wonderful event.
こんな素晴らしい景色を見られて、冥土の土産になったよ。
Seeing such a wonderful view, I feel like I can die happy now.
あのコンサートは本
That concert is truly a memory I'll take to the afterlife.