Shaku is a Japanese unit of measurement, roughly equivalent to one foot or 30.3 centimeters. There are several synonyms for this term which may be used depending on the context. For example, in some cases, the phrase "jō" may be used to refer to the shaku as a unit of measurement. Other synonyms may include "sun," which is equal to one-tenth of a shaku, or "bu," which refers to one-tenth of a sun. Additionally, the English term "foot" or "feet" may also be used as a synonym for shaku, particularly in translations or other contexts where imperial units of measurement are preferred.