  We systematically analyze the broadband (0.5--200 keV) X-ray spectra of hard
X-ray ($>10$ keV) selected local low-luminosity active galactic nuclei (LLAGNs)
observed with {\it Suzaku} and {\it Swift}/BAT. The sample consists of ten
LLAGNs detected with {\it Swift}/BAT with intrinsic 14--195 keV luminosities
smaller than $10^{42}$ erg s$^{-1}$ available in the {\it Suzaku} archive,
covering a wide range of the Eddington ratio from $10^{-5}$ to $10^{-2}$. The
overall spectra can be reproduced with an absorbed cut-off power law, often
accompanied by reflection components from distant cold matter, and/or
optically-thin thermal emission from the host galaxy. In all objects,
relativistic reflection components from the innermost disk are not required.
Eight objects show a significant narrow iron-K$\alpha$ emission line. Comparing
their observed equivalent widths with the predictions from the Monte-Carlo
based torus model by \cite{Ike09}, we constrain the column density in the
equatorial plane to be $\log N^{\rm eq}_{\rm H} > 22.7$ or the torus half
opening angle $\theta_{\rm oa} < 70^\circ$. We infer that the Eddington ratio
($\lambda_{\rm Edd}$) is a key parameter that determines the torus structure of
LLAGNs: the torus becomes large at $\lambda_{\rm Edd} \gtrsim 2\times10^{-4}$,
whereas at lower accretion rates it is little developed. The luminosity
correlation between the hard X-ray and mid-infrared (MIR) bands of the LLAGNs
follows the same one as for more luminous AGNs. This implies that other
mechanisms than AGN-heated dust are responsible for the MIR emission in low
Eddington ratio LLAGNs.
