Reiki, a Japanese energy healing modality, draws upon the concept of the five elements, often referred to as the "Five Great Elements" or "Five Elements Theory," in its practice. These elements, Earth, Air, Fire, Water, and Aether (also known as Spirit or Ether), represent fundamental forces of nature and are believed to be interconnected and influential in both the physical and energetic realms. Each element embodies unique qualities and properties that impact our physical, emotional, mental, and spiritual well-being.