  We study the thermodynamics of near horizon near extremal Kerr (NHNEK)
geometry within the framework of $AdS_2/CFT_1$ correspondence. We start by
shifting the horizon of near horizon extremal Kerr (NHEK) geometry by a general
finite mass. While this shift does not alter the geometry in that the resulting
classical solution is still diffeomorphic to the NHEK solution, it does lead to
a quantum theory different from that of NHEK. We obtain this quantum theory by
means of a Robinson-Wilczek two-dimensional Kaluza-Klein reduction which
enables us to introduce a finite regulator on the $AdS_2$ boundary and compute
the full asymptotic symmetry group of the two-dimensional quantum conformal
field theory on the respective $AdS_2$ boundary. The s-wave contribution of the
energy-momentum-tensor of this conformal field theory, together with the
asymptotic symmetries, generate a Virasoro algebra with a calculable center,
which agrees with the standard Kerr/$CFT$ result, and a non-vanishing lowest
Virasoro eigenmode. The central charge and lowest eigenmode produce the
Bekenstein-Hawking entropy and Hawking temperature for NHNEK.
