PROBLEM TO BE SOLVED: To provide a postal code quick reference guide that allows efficient search of postal codes.;SOLUTION: A front cover of a postal code book shows prefecture names and pages thereof in a table as the large classification (header). A middle cover selected from the front cover shows a table of cities and wards and pages thereof as the middle classification (middle header) in a manner that the table stands out.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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