noun
leaves used for serving sake, rice, etc.
Archaic term referring to specific leaves (possibly from the oak or similar tree) used as a traditional serving vessel or offering tray in ancient Japan.
古文献には、神饌を三角柏に盛ったと記されている。
Ancient documents record that sacred offerings were placed on mitsunokashiwa leaves.
The term combines 三角 (mitsu, 'three corners' or 'triangle') and 柏 (kashiwa, 'oak'), likely referring to the shape or type of leaf used. The exact historical derivation is uncertain.