Ha Chong Hyun or Ha Chong-hyun is a South Korean artist. Today, through his Conjunction series (1974–present), Ha is best known as a leading practitioner of the Korean monochrome art trend known as Dansaekhwa. However, the arc of Ha's practice from the 1960s to the present is more fundamentally characterized by his wide explorations of materiality and ways of challenging the conventions of art making.