Tsunohanzō is a tsukumogami—an animated household object—depicted by Toriyama Sekien in Hyakki Tsurezure Bukuro as a lacquered ceremonial washbasin (kakutsubo/tsuno-darai) turned uncanny. Once used in the Heian court for cosmetics and handwashing, the vessel is said to gain spirit through long use and human intent, filling with water at night to reveal and wash away written characters. Many portrayals reference the legend of Ono no Komachi washing papers to expose truth from falsehood.