The problem at hand involves extracting specific data from a database. In this case, the data pertains to cities in a particular country, Japan. The database contains a table named 'city' with various fields, one of which is 'CountryCode'.
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The solution uses a simple SQL 'SELECT' statement to query the database. It specifies the 'name' field to be returned from the 'city' table, but only for rows where the 'CountryCode' is 'JPN', which stands for Japan. Thus, it effectively retrieves the names of all cities in Japan.
select name from city where CountryCode="JPN";
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