You should read DBZ, the concept of Death is near about 10 times worse. Lol
I like your thread, so + Rep.
As far as I can tell; Kishi wants to tell us that there is a vague concept of Death and Living here. For example, take a soul. The Body dies; but the Soul lives on (Which is used in Edo-Tensei). So, the person is dead but at the same time alive.
Kishi wants to show us that Death is not the end, there is still life beyond and possibilities to explore.