merciful rain in a drought, a relief in a time of need, a realisation of a desire

Rare spelling of お祈りメール (oinori mēru, “job rejecting e-mail”).

(idiomatic) to die of natural causes, to die of old age

capybara

Those pieces of music within the gagaku genre that purportedly originated in India.

guinea pig

(literally) above heaven and under heaven / (figuratively) the whole world or universe

dahlia

(literally, Buddhism) whether it's above heaven, or it's under heaven, only I reign supreme