belief in the afterlife; belief in the next world
Refers to the religious or spiritual conviction that life continues after death in another realm.
Many religions have a belief in the afterlife.
来世 means 'the next world' or 'the afterlife' as a place or state, while 来世信仰 is the belief in such an afterlife.
死後の世界 is a more descriptive phrase meaning 'the world after death', often used in secular contexts, whereas 来世信仰 is a formal term for the belief itself.
Compound of 来世 (raise, 'next world') and 信仰 (shinkō, 'belief'). The exact historical derivation is uncertain, but the term is a straightforward Sino-Japanese formation.