Pharmaceutical composition containing substance inhibiting HSP47 production

A pharmaceutical composition comprising a substance inhibiting HSP47 production, selected from the group consisting of a malt extract, a flavonoid compound, a protein-bound-polysaccharide obtained from a fungus belonging to Coriolus versicolor, a paeoniflorin derivative, a tocopherol derivative, and a ferulic acid derivative, and a pharmaceutically acceptable carrier is disclosed. The substance inhibiting HSP47 production can efficiently improve physiological conditions of a patient suffering from diseases exhibiting pathosis of overproduction of the extracellular matrix, and efficiently treat such diseases. Further, the substance is useful for preventing or treating various diseases accompanied with abnormal growth of the vascularization.