There are two branches shiatsu schools and some branches of reiki schools: that incorporating Traditional Chinese Medicine 繁体中国語の診断. to find weaks, issues flow, and unbalances of ki (chi) in the the body.
TCM (Traditional Chinese Medicine) used Taoist (daoist) 5 elements theory (Earth, Water, Fire, Air, and Metal), which are associated to 12 organs and there meridian lines, and meridian lines are paths the Ki (chi) flow through the body.
Each element and organ is associated to Yin & Yang and connected to anatomy, psychology, and physiology of the human body.