What is "okubi-e"

An is a Japanese portrait print or painting in the ukiyo-e genre showing only the head or the head and upper torso. Katsukawa Shunkō I (1743–1812) is generally credited with producing the first ōkubi-e. He, along with Katsukawa Shunshō, designed ōkubi-e of male kabuki actors. In the early 1780s, Utamaro designed the first ōkubi-e of beautiful women. The shogunate authorities banned ōkubi-e in 1800, but the ban only lasted for about eight years.