Ma is a Japanese word which can be roughly translated as “gap”, “space”, “pause” or “the space between two structural parts.” The spatial concept is experienced progressively through intervals of spatial designation. In Japanese, ma, the word for space, suggests interval. It is best described as a consciousness of place, not in the sense of an enclosed three-dimensional entity, but rather the simultaneous awareness of form and non-form deriving from an intensification of vision.
Ma is not something that is created by compositional elements; it is the thing that takes place in the imagination of the human who experiences these elements. Therefore ma can be defined as an experiential place understood with emphasis on interval.
Wikipedia for more on this concept, and try to experience ma daily in your life.
— Shin Noguchi