This tea bowl was made by Bioni, the wife of Aumeya, the original creator of Raku ware. It is characterized by its light ame glaze. The “Waka Shohin Shoho” (Japanese-Chinese Book of Ware) (1694, compiled in the 7th year of the Roku era) states, “Nun-yaki, Choujiro-mo, Kakiyaku-chawan (tea bowl with persimmon paste), no black.