Business::ISBNのデータを自分で更新出来たらなとモジュールを眺めるとデータはData.pmにあるらしい use Business::ISBN::Data 20081208; # now a separate module で、Data.pmでどのように持っているかというと %country_data = ( 0 => ['English speaking area' => ['00' => '19', '200' => '699', '7000' => '8499', '85000' => '89999', '900000' => '949999', '9500000' => '9999999'] ], 1 => ['English speaking area' => ['00' => '09', '100' => '399', '4000' => '5499', '55000