Shunga are a type of ukiyo-e, usually executed in woodblock print format or, more rarely, as painted scrolls.

Shunga were produced between the sixteenth century and the nineteenth century by ukiyo-e artists, since they sold more easily and at a higher price than their ordinary work. Shunga prints were produced and sold either as single sheets or - more frequently - in book form, called enpon. (Wikipedia)

Go into and enjoy it.