Katsushika Ōi

Katsushika Ōi (葛飾 応為, c. 1800 – c. 1866), also known as Ei (栄; or O-Ei (お栄) with the honorific prefix) or Ei-jo (栄女; lit. 'woman Ei'), was a Japanese ukiyo-e artist of the early 19th century Edo period. She was a daughter of Hokusai from his second wife. Ōi was an accomplished painter who also worked as a production assistant to her father.