Abstract: A method of producing a restorative material used to restore a tooth-deficient area in an oral cavity, the method comprising: positioning, in a support carrier, a first cell mass formed from either mesenchymal cells or epithelial cells and a second cell mass formed from the other of the mesenchymal cells or epithelial cells, one of the mesenchymal cells or epithelial cells being derived from a tooth germ and the first and second cell masses being not mixed with each other but made to closely contact each other; culturing the first and second cell masses to form a reconstructed tooth germ or tooth; and confirming directionality of the reconstructed tooth germ or tooth formed by the culturing so as to enable the reconstructed tooth germ or tooth to be embedded in the tooth-deficient area such that a tip of the tooth faces an interior of the oral cavity, the tooth germ or tooth whose directionality has been confirmed being used as a restorative material to obtain an equivalent of a missing tooth in the tooth-def

Abstract: There is provided a value data management method for managing a first value data acquired by each of users and having value exchangeable for specific merchandise, comprising: reading second value data from a first information storage medium and user identification data from a second information storage medium; and updating the first value data acquired by the user corresponding to the user identification data read from the second information storage medium, based on the second value data read from the first information storage medium.