Roof shell Itayagai (title on object) A comparison of Genroku poems and shells (series title) Genroku kasen kaiawase (series title on object), Two women, one cuts pieces of rice cake, the other reads a book by the light of a lantern. In the background two New Year decoration pieces, including fern leaf, rice cake and pine branches. The shell to which the title refers is depicted in the fan-shaped cartouche. With two poems. Katsushika Hokusai (mentioned on object), Japan, 1821, paper, colour woodcut, h 198 mm ⊙ w 176 mm.