Direct numerical simulation around a two-dimensional hump shape is conducted at the Reynolds number Reh = 16, 000, based on the hump height. We investigate wall-turbulence structures around the hump in order to predict and control them to suppress separation. At this Reynolds number, specific striped wall-turbulence structure appears at the leading-edge near the wall surface. Its spanwise length-scale is close to that of the streak in a fully-developed turbulent channel flow. That is λy = 0.08 scaled with the hump height, which corresponds to λ+ y = 150 in the local viscous unit. We identify two more different spanwise-correlated scales, λy = 0.40 and 0.13 around the hump. Spanwise length-scale of λy = 0.40 is around λ+ y = 600. On the other hand, the other scale λy = 0.13 is not dependent on the local viscous scale.