Optical to mid-IR SEDs of our debris-disk candidates with 18 μm excess emission. Crosses, open squares, filled squares, open circles, filled circles, and triangles indicate the photometric data points measured with Hipparcos (V_T, B_T) and USNO-B (I, z), 2MASS (J, H, Ks), IRSF (J, H, Ks), AKARI 9 μm, AKARI 18 μm, and WISE (3.4, 4.6, 12, 22 μm), respectively. The red filled circles indicate AKARI 18 μm flux used for excess identification. Solid curves indicate the contribution of the photosphere estimated on the basis of the optical to near-IR fluxes of the objects.