Capturing the feeling of the season at the time the chashaku was crafted.  Example: the mei of the chashaku to the left is 'Ghostly Winter Wood’ (Fuyukodachi 冬木立). It was carved from a twig from a fallen winter branch, the maker finding the last line of this haiku appropriate:

Leafless tree, ax hew,

Such vibrant scent fills the air!

Ghostly winter woods

- by Buson (Adam Sōmu Wojciński translation)