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This paper reports on the first results of the Suzaku observation in the SgrC region. We detected four diffuse clumps with strong line emission at 6.4keV,Ka from neutral or low-ionized Fe. One of them, M359.38-0.00, is newlydiscovered with Suzaku. The X-ray spectra of the two bright clumps,M359.43-0.07 and M359.47-0.15, after subtracting the Galactic center diffuseX-ray emission (GCDX), exhibit strong Ka line from FeI with large equivalentwidths (EWs) of 2.0-2.2keV and clear Kb of FeI. The GCDX in the Sgr C region iscomposed of the 6.4keV- and 6.7keV-associated components. These arephenomenologically decomposed by taking relations between EWs of the 6.4keV and6.7keV lines. Then the former EWs against the associated continuum in thebright clump regions are estimated to be 2.4(+2.3_-0.7)keV. Since the twodifferent approaches give similar large EWs of 2keV, we strongly suggest thatthe 6.4keV clumps in the Sgr C region are due to X-ray reflection/fluorescence(the X-ray reflection nebulae).

X-Ray Reflection Nebulae with Large Equivalent Widths of Neutral Iron Ka Line in the Sgr C Region