Winter Days or Fuyu no Hi is a 2003 Japanese film collaboration between thirty-five anime artists. The movie is an animated version of the 17th Century renga poem by the haiku master Basho.
Renga is a collaborative poetic form that emerged in Medieval Japan and influenced the the subsequent development of haiku. The educated elite in feudal Japan enjoyed creating renga at special poetry gatherings . Individual participants took turns composing short stanzas that linked to the lines of the preceding poet. Much like the poetry, the film Winter Days is an interesting an beautiful example of artistic cooperation.