Ghost of Tsushima: Bamboo
Ghost of Tsushima's Bamboo is a common wood used by Bowyers to upgrade ranged weapons. Bamboo grows throughout the wilderness of Tsushima.
For all the various kinds of material, you collect them by pressing R2.
Bamboo is one of the most common materials that Jin can collect as there are lots of them on the island.
Visit our Ghost of Tsushima 100% Walkthrough to get more details.