Since no folklore on a specter named Kameosa exist, it is thought to be a created specter, and there is a theory that it was created from "亀長" (Kameosa), a pen name for Harumachi KOIKAWA as a painter, who was a disciple of Sekien.
瓶長という名の妖怪の伝承は存在しないことから創作妖怪とされ、石燕の門人・恋川春町の絵師としての雅号・亀長（かめおさ）から創作されたものとの説もある。