the double circle mark below kunisada's signature is a "toshidama-in", the distinctive seal used by all generations of the utagawa school after toyokuni i first adopted it, for reasons unknown, in 1808 or 1809. it is a lucky symbol, referencing gifts of coins given to children at new year's. kunisada gave the mark his own unique twist, elongating it and making it a yellow frame with red infill containing his signature. from 1850, he used this cartouche-style almost exclusively.