A Zen monk of the Soto School cleans the meditation hall in the traditional manner at the Seiryu-ji Temple in Hikone City, Japan.Sitting Zen (or Zazen) is at the heart of Buddhist practice in Japan..In Zen Buddhism, zazen (literally "seated meditation") is a meditative discipline practitioners perform to calm the body and the mind and experience insight into the nature of existence and thereby gain enlightenment (satori). 'Sammu' or work is a practice of 'moving Zen': a mindless repetition of activity that frees the mind.