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The soft diffuse X-ray emission of twelve fields observed with Suzaku arepresented together with two additional fields from previous analyses. All havegalactic longitudes 65 deg < l < 295 deg to avoid contributions from the verybright diffuse source that extends at least 30 deg from the Galactic center.The surface brightnesses of the Suzaku nine fields for which apparentlyuncontaminated ROSAT All Sky Survey (RASS) were available were statisticallyconsistent with the RASS values, with an upper limit for differences of 17 x10^{-6} c s^{-1} amin^{-2} in R45}-band. The Ovii and Oviii intensities arewell correlated to each other, and Ovii emission shows an intensity floor at ~2photons s^{-1} cm^{-2 str^{-1} (LU). The high-latitude Oviii emission shows atight correlation with excess of Ovii emission above the floor, with (Oviiiintensity) = 0.5 x [(Ovii intensity) -2 LU], suggesting that temperaturesaveraged over different line-of-sight show a narrow distribution around ~0.2keV. We consider that the offset intensity of Ovii arises from the Heliosphericsolar wind charge exchange and perhaps from the local hot bubble, and that theexcess Ovii (2-7 LU) is emission from more distant parts of the Galaxy. Thetotal bolometric luminosity of this galactic emission is estimated to be 4 x10^{39} erg s^{-1}, and its characteristic temperature may be related to thevirial temperature of the Galaxy.

Energy Spectra of the Soft X-ray Diffuse Emission in Fourteen Fields Observed with Suzaku