The heads can be quite sophisticated mechanically. However, in a culture like that of Japan, which privileges seniority, the system can also be considered a mechanism to manage competition among artistic egos and provide for a balance among the demographics of the puppeteers in a troupe in order to fill each role. The puppets of the Osaka tradition tend to be somewhat smaller overall, while the puppets in the Awaji tradition are some of the largest as productions in that region tend to be held outdoors. Some of them are edible. A third puppeteer, the ashizukai, operates the feet and legs.
In plays with supernatural themes, a puppet may be constructed so that its face can quickly transform into that of a demon. Less complex heads may have eyes that move up and down, side to side or close, and noses, mouths, and eyebrows that move. The puppets of the Osaka tradition tend to be somewhat smaller overall, while the puppets in the Awaji tradition are some of the largest as productions in that region tend to be held outdoors. Puppeteers begin their training by operating the feet, then move on to the left hand, before operating able to train as the main puppeteer.
Bunraku puppetry has been a documented traditional activity for Japanese for hundreds of years.. The puppets of the Osaka tradition tend to be somewhat smaller overall, while the puppets in the Awaji tradition are some of the largest as productions in that region tend to be held outdoors.