noun
cylindrical straw seat covered in fabric
Archaic term for a traditional round cushion or seat made of straw and wrapped in cloth. Not in common modern use.
昔の日本では、草とんは床に座るための一般的な座具だった。
In old Japan, the straw seat was a common sitting implement placed on the floor.
座布団 is the modern flat cushion, while 草とん is an archaic cylindrical straw seat.
Compound of 草 (straw) and とん (from 墩, meaning a block or mound). The exact historical derivation is uncertain, but the term describes a traditional straw seat.