Jōchō, also known as Jōchō Busshi, was a Japanese sculptor of the Heian period. He popularized the yosegi technique of sculpting a single figure out of many pieces of wood, and he redefined the canon of body proportions used to create Buddhist imagery. His style spread across Japan and defined Japanese sculpture for the next 150 years. Today, art historians cite Jōchō as "the first of a new kind of master sculptor" and "one of the most innovative artists Japan has ever produced."

An artistic canon of body proportions, in the sphere of visual arts, is a formally codified set of criteria deemed mandatory for a particular artistic style of figurative art. The word canon was first used for this type of rule in Classical Greece, where it set a reference standard for body proportions, to produce a harmoniously formed figure appropriate to depict gods or kings. Other art styles have similar rules that apply particularly to the representation of royal or divine personalities.