Wikipedia
He-gassen
He-Gassen ( Japanese: 屁合戦, literally: "Fart competitions"), also known as Houhi-Gassen (放屁合戦, "Farting competitions") is a Japanese art scroll created during the Edo period by an unknown artist or several unknown artists.
The scroll depicts various scenes with one peculiar characteristic reoccurring throughout the scroll, namely that at least one character is having a bout of flatulence directed against other characters. The scroll was made with the intention to highlight the political and social changes in Japan.
The scroll has been digitized by the Waseda University Library.