  The hidden Kerr/CFT proposal implies that the massless scalar wave equation
in the near-region and low-frequency limit respects a hidden
SL(2,R)$\times$SL(2,R) invariance in the Kerr black hole spacetime. We may use
this symmetry to determine quasinormal frequencies (QNFs) of the massless
scalar wave propagating around the Kerr black hole algebraically. It is shown
that QNFs obtained using the hidden conformal symmetry near the horizon
correspond approximately to not only those of scalar perturbation around the
near-horizon region of a nearly extremal Kerr (NEK) black hole, but also those
of non-equatorial scalar modes around the NEK black hole. This indicates that
the hidden Kerr/CFT proposal could determine quasinormal modes and frequencies
of the massless scalar wave around the NEK (rapidly rotating) black hole
approximately.
