A well-known problem for Conjunct Reduction (CR) accounts of NP coordination concerns the collective reading of sentences like John and Mary worked together, which does not have the same reading as John worked together and Mary worked together. In this paper, we argue that a CR account of NP coordination is feasible, in at least one type of NP coordination in Korean. There are two types of NP coordinations in Korean. In one (Type A), only the final conjunct carries case and non-final conjuncts carry the conjunctive suffix -(k)wa. In the other (Type B), case-markers occur on all conjuncts and the analytic conjunction kuliko occurs between conjuncts. Interestingly, while Type A allows both collective and distributive readings, Type B has only the distributive reading. We claim that this is because Type B coordination is derived by CR. This is supported by several pieces of syntactic and semantic evidence. Our analysis also implies that case-markers in Korean cannot be construed as lexically attached suffixes.