 The "Zashiki Hakkei" theme became popular with artists such as Torii Kiyonaga, who produced two series based on Harunobu's "Zashiki Hakkei" in the late 1770s, and Isoda Koryūsai, who produced a "Zashiki Hakkei" series of his own.Ukiyo-e emerged in Japan as a genre of paintings and woodblock prints in the late 17th century.Early prints were printed with black ink; colour was sometimes added by hand, and by the mid-18th century with extra woodblocks.