A content control method according to the present disclosure includes: obtaining first content file information including attribute information items each on one of first content files which belong to a first content file group; obtaining second content file information including attribute information items each on one of second content files which belong to a second content file group; narrowing down the first content files, the narrowed-down first content files each having an attribute information item satisfying a condition which is set based on the first content file information and the second content file information; and identifying a first content file and a second content file which are partially or entirely same by matching entity information items each on one of the second content files and entity information items each on one or more of the narrowed-down first content files as matching targets.
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