A device includes a memory configured to store a program; and a processor coupled to the memory and configured to execute a process based on the program. The process includes: for input data made of a combination of pieces of unit data and including a plurality of consecutive records each including data of a plurality of items, when a sequence of type information indicating a kind of each piece of the unit data in the input data is divided into partial sequences each having a certain length, analyzing a break position of the records in the input data by determining, as a length of each of the records, the length of each of the partial sequences when sequences of type information in all the partial sequences correspond to each other.