Lee Seung-Heun (Korean: ???; Hanja: ???; born December 23, 1950), better known as Ilchi Lee, is a South Korean author and the founder of a variety of mind-body training methods, including Dahnhak (??), Body & Brain, Brain Respiration (old name), Brain Wave Vibration, Kookhak Qigong, and DahnMuDo, all falling under the umbrella name of Brain Education.
Lee began teaching his methods in a park in the 1980s, and since that time the practice has developed into an international network of for-profit and non-profit entities.