The drainage network within a basin is the conduit through which much surface water and sediment are routed. In a basin, the position where hillslopes end and channel begin has been considered the position of transition between diffusive processes upslope and incisive fluvial processes downslope. Consequently, understanding channel head location is an important issue in understanding basin hydrology and geomorphology. This study examines channel head position and characteristics in a upstream basin of Takejin river. In this study, the position of channel heads was mapped within the watershed and plotted on a digital elevation model of the watershed. It was found that the majority of channel heads have relatively small source areas and that graphical descriptors, such as the area-slope relationship can provide reliable measures of the position of the heads of first-order streams and the transition from hillslope to channel.