fallen trees (esp. cryptomeria on Yakushima)
Refers to naturally fallen trees, particularly cryptomeria (sugi) on Yakushima, often used in the context of the island's famous ancient forests and the related term 屋久杉 (Yakusugi).
See also: 屋久杉 (やくすぎ)
On Yakushima, fallen trees develop a unique character over many years.
This craftwork is made from fallen trees.