This is the opening by Yuriy Norshteyn from a collaborative film based on a renga by 17th-century Japanese poet Bashō. Winter Days was the Grand Prize winner of the Japan Media Arts Festival in 2003.
A renga is constructed by people adding new lines in rotation. So although the poem is credited—or at least cataloged—under Bashō, it is in fact the work of many hands, as is the forty minute animation. It's probably a little obscure to most of us what Bashō is doing: searching his cloak for vermin and cracking them with his nails. Chikusai, who is an imaginary itinerant doctor and holy fool, has been listening to the trees with his medical horn, usually used for listening to patients' hearts and lungs. He is amused to find the poet in a worse state than he, himself, and trades hats. Then the fool lets his hat go and is free, while Bashō goes on, holding the better one on his head. A temple bell tolls to remind us of the frivolity of earthly concerns.
The complete film is only available in two Japanese releases and one Korean release.