Soji is  The word soji translates to “cleaning” a Japanese ritual of cleaning the dojo after training. It is a vital part of training and is a form of purification that teaches humility and respect for the dojo and instructor. In Japan usually participation is by 3rd Dan and below, but not uncommon to find higher dans cleaning after hours to keep themselves humble.

Soji is a ritual that is derived from Zen and Shinto, where cleanliness and purity are closely connected to purification practices. It is a form of training that teaches that everyone is responsible for the dojo, regardless of rank, age, or seniority. Using the dojo without cleaning it is considered a sign of immaturity. 

Soji is one of several rituals that teach respect in martial arts, along with bowing in and out of class, bowing before entering the dojo, and bowing to a partner.