Shunga (春画) is a Japanese term for erotic art. Most shunga are a type of ukiyo-e, usually executed in woodblock print format. While rare, there are extant erotic painted handscrolls which predate the Ukiyo-e movement. Translated literally, the Japanese word shunga means picture of spring; "spring" is a common euphemism for sex.
The ukiyo-e movement as a whole sought to express an idealisation of contemporary urban life and appeal to the new chōnin class. Following the aesthetics of everyday life, Edo period shunga varied widely in its depictions of sexuality. As a subset of ukiyo-e it was enjoyed by all social groups in the Edo period, despite being out of favour with the shogunate. Almost all ukiyo-e artists made shunga at some point in their careers.
Shunga was heavily influenced by illustrations in Chinese medicine manuals beginning in the Muromachi era (1336 to 1573). Zhou Fang, a great Tang-dynasty Chinese erotic painter, is also thought to have been influential. He, like many erotic artists of his time and place, tended to exaggerate the size of the genital organs, a common shunga topos. While the literal meaning of the word "shunga" is significant, it is in fact a contraction of shunkyū-higi-ga (春宮秘戯画), the Japanese pronunciation for Chinese sets of twelve scrolls depicting the twelve sexual acts that the crown prince had to carry out as an expression of yin yang.
The Japanese influences of shunga date back to the Heian period (794 to 1185). At this point, it was found among the courtier class. Through the medium of narrative handscrolls, sexual scandals from the imperial court or the monasteries were depicted, and the characters tended to be limited to courtiers and monks.