This conceives of prana, or life energy, as if it were something ontologically distinct. The Western concept of energy is truer to observation I think; energy is in all things, energy is never destroyed; life is a manifestation of an energetic process. We cannot say that when something dies, it dies because the energy has left it, although it might superficially seem to be the case, but rather that particular process has ended. Life is a process, not a thing. To claim that there is life after death is like claiming that running continues to exist after the race has finished. Sure, other races will take place, but that is because energy is in all things, not because running has left the first runners and found some new athletes to invade.
There is nothing like a 'Western concept of Energy' and an 'Eastern concept of Energy'. The usual definitions of energy are familiar to most people world over. That is not a problem.
Certain phenomena do not have ready descriptions or definitions. The word 'energy' is used only because that is the most suitable one among the available words.
'Life is a process' that is initiated and sustained by something. Electricity gives life to devices. A machine jumps to life only due to electricity after which the same electricity sustains the process that the object is designed for. So defining a machine as just a process without taking into account the power behind it doesn't make sense. Without the electricity there is no process.
Similarly, Prana is what initiates and sustains the process that an organism goes through. Once the Prana leaves, the organism dies.
There is nothing is this inference that negates or conflicts with any observation that we have made about life and death. It only adds to it.