Lee Chung-kyu (1996) considers that the culture is properly divided into five phases: Phases I and II typified by violin-shaped daggers, Phases IV and V by slender daggers, and Phase III by the transition between the two.
Lee Chung-kyu har opdelt kulturen i fem faser: faserne I og II var præget af violinformede dolke, faserne IV og V ved slanke dolke og fase III var overgangen mellem de to.