Students deepen their work with the Masunaga Zen Shiatsu method through study of the Meridian Extensions and Six Divisions of Yin and Yang in body, mind and spirit. We explore the various manifestations of yin and yang, especially as expressed through Temperament and Personality. Yin Yang theory is creatively descibes the changes and transformations that occur in any natural system throughout time and space The recognition of the stages of transformation in any living system leads to deep and powerful insights into health and balance. By understanding the interactive dynamics of Yin Yang and the Five Elements, students learn to treat deficiencies or excesses in any element through any other element as a function of Creation and Control Cycle dynamics. In this class, we explore the application of this transformational theory to both the physical and psycho-spiritual body. Masunaga Meridian Extensions, Eight Temperaments theory of Yves Requena and Five Element Creation and Control Cycle theories inspire and inform our study and practice.