  We conduct X-ray reverberation mapping and spectral analysis of the radio
galaxy Centaurus A to uncover its central structure. We compare the light curve
of the hard X-ray continuum from Swift Burst Alert Telescope observations with
that of the Fe K$\alpha$ fluorescence line, derived from the Nuclear
Spectroscopic Telescope Array (NuSTAR), Suzaku, XMM-Newton, and Swift X-ray
Telescope observations. The analysis of the light curves suggests that a
top-hat transfer function, commonly employed in reverberation mapping studies,
is improbable. Instead, the relation between these light curves can be
described by a transfer function featuring two components: one with a lag of
$0.19_{- 0.02}^{+ 0.10}~\mathrm{pc}/c$, and another originating at $r >
1.7~\mathrm{pc}$ that produces an almost constant light curve. Further, we
analyze the four-epoch NuSTAR and six-epoch Suzaku spectra, considering the
time lag of the reflection component relative to the primary continuum. This
spectral analysis supports that the reflecting material is Compton-thin, with
$N_{\mathrm{H}} = 3.14_{-0.74}^{+0.44} \times 10^{23}~ \mathrm{cm}^{-2}$. These
results suggest that the Fe K$\alpha$ emission may originate from Compton-thin
circumnuclear material located at sub-parsec scale, likely a dust torus, and
materials at a greater distance.
