Tenpyō shaku (approx. 29.6 cm)
Archaic unit of length used in the Nara period, based on the Tang dynasty shaku. Not in modern use.
The Tenpyō shaku is a unit of length used in the Nara period.
From 天平 (Tenpyō, a Nara-period era name) + 尺 (shaku, a unit of length). The exact historical derivation is uncertain, but it refers to a Tang-dynasty-influenced shaku used during that era.