This is a Ko-Imari sometsuke (blue and white) haisen (sake cup washer) believed to have been fired in Arita, Hizen during the Edo period. This vessel, used for washing sake cups during drinking sessions, is characterized by its takatsuki (high-footed) shape with a high foot. This piece exhibits slight distortion from hand-throwing, a thin porcelain body, and when gently tapped, it produces a clear, metallic sound with a long reverberation. These are typical characteristics of Edo-period porcelain. The glaze is not overly uniform, and iron spots are scattered within the interior. The cobalt blue (gosu) also displays natural variations in color. These points suggest that this is not a modern mass-produced item, but rather an example of Edo-period Ko-Imari craftsmanship. 【Condition】 No water leakage. No cracks (nyu), chips, flaking, or repairs are visible. There are some areas where the glaze did not fully cover the surface and iron spots are present, but these are from the firing process and do not affect use or preservation. Overall, the condition is very good. Please understand that there may be minor scratches and wear and tear typical of antique items. 【Material, Dimensions, Color, etc.】 Porcelain Height: approx. 13.5 cm Diameter: approx. 15.5 cm Foot height: approx. 6 cm Weight: approx. 780g Color: White porcelain / Sometsuke (blue and white)