Artist Koikawa Harumasa (a.k.a. Banki): fl. 1801–18. Wikipedia: Koikawa Harumasa (恋川 春政; active 1800–1820), later called Banki Harumasa (晩器 春政). Associated with Katsukawa school.
Signed: Banki ga (on the bamboo flower container in the background). Censor's seal: kiwame. Mark of unidentified publisher, Genshoku #1017; Marks U084 Ibiko, p. 387.
References:
Jacob Pins #828.
