  Suzaku observations of a TeV unidentified (unID) source, HESS J1745-303, are
presented. A possible excess of neutral iron line emission is discovered, and
is likely associated with the main part of HESS J1745-303, named "region A". It
may be an X-ray reflection nebula where the X-rays from previous Galactic
Center (GC) activity are reflected by a molecular cloud. This result further
strengthens the assumption that the molecular cloud which is spatially
coincident with region A of HESS J1745-303 is located in the GC region. The TeV
emission from molecular clouds is reminiscent of the diffuse TeV gamma-rays
from the GC giant molecular clouds, and it could have the same emission
mechanism. With deep exposure mapping observations by Suzaku, a tight
upper-limit on the 2-10 keV continuum diffuse emission from region A is
obtained, as 2.1x10^-13ergs s^-1cm^-2. The flux ratio between 1-10 TeV and 2-10
keV is larger than 4. Possible scenarios to reproduce wide-band spectra from
keV to TeV are examined. Thermal X-rays from nearby two old supernova remnants,
G359.0-0.9 and G359.1-0.5, are detected, and their emission properties are well
determined in the present study with deep exposure.
