ヒノキ、サワラ(植物)、スギ、エノキなど、筋目がよく通って削ぎやすく、水に強い材木が用いられる。

Water-resistant wood with a pronounced grain that is easy to shape, such as Japanese cypress, Japanese false cypress, Japanese cedar and Japanese hackberry, is used. - Wikipedia日英京都関連文書対訳コーパス

地元で産出されるヒノキやサワラ(植物)の薄板を円形・楕円形に曲げ加工し、合わせ目を山桜の皮で綴じた側板に底や蓋を付けた器物で、日用品として飯器、弁当箱、茶道具、そば道具、せいろなどに用いられる。

It is a container with a lid and base on its side made by bending a thin lumber of Japanese cypress or Japanese falsecypress produced locally into a circular or oval form, and by sewing its joint with the bark of Japanese mountain cherry; it is used as a rice cooker, lunchbox, tool for tea ceremonies and soba (buckwheat noodle) dish, and seiro (wooden frame holder with reed base used to steam food over a pot). - Wikipedia日英京都関連文書対訳コーパス