PROBLEM TO BE SOLVED: To collect almost all of corporation information existing at home from disclosure information on a [Social Security and Tax Number System], build a history database of change information such as a corporation having a new number assigned, and the like, and allow real existence of a declared corporation and the like to be verified using the history database.SOLUTION: A corporation information creation device 1A creating corporation information comprises: an acquisition unit 101 that sequentially acquires corporation information including a corporation name, an address and a corporation number, which are disclosed; a processing unit 102 that creates an update history of the corporation information on the basis of the acquired corporation information; and a storage unit 103 that stores the update history. The processing unit 102 is configured to: regularly search for the corporation information sequentially acquired by the acquisition unit 101 with the corporation name or corporation number as a search key; and create the update history of the corporation information on the basis of a result of the search to store the created update history in the storage unit 103.SELECTED DRAWING: Figure 1
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