The bowl is made of green glass. It has a thicker wall, and its shape is formed with the patterns raised from the surface when it is removed. The edge of the bowl is very thin, reflecting the essence of glass making techniques then. The fragments of the same glass bowl made in the same period were unearthed in the Island of Okinoshima (registered as a World Heritage site in 2017). It is learned that in addition to the white glass bowl, there were also many Sassanian glassware handed down to Japan then.