PROBLEM TO BE SOLVED : To provide a novel application of cyclodextran. SOLUTION : (1) A composition containing one or more types selected from the group consisting of cyclodextran and derivatives thereof. (2) the composition according to (1) in which the derivative of cyclodextran is α-1, 3-branched cyclodextran or the like in which one to several pieces of glucose are bonded to cyclodextran in α-1, 3-bond. (3) a medicine, a cosmetic, a food/drink product, ink, a sanitary product, conductive liquid, resin, column containing the composition described above. (4) a solubilization method of a hardly soluble compound containing the composition described above, a masking method of food/drink product or the like. SELECTED DRAWING : None COPYRIGHT : (C)2019, JPO&INPIT