As others have stated the origins of the Fw 200 was that of a civilian airliner, however it was the Japanes that chanaged that!
"The Japanes, always interested in aeronautical developments abroad, evinced a marked interest in the Condor, and on November 28, 1938, the Fw 200V1 took-off for Tokyo, stopping at Basta, Karachi and Hanoi for refuelling, and arriving at the Japanese capital in slightly less than 48 hours of which 42 hrs. 18 min. were flying time.
Apart from placing an order for five Fw 200B transports .... impressed by the Conder's long range capabilities, were interested in an adaptation of the Condor for the long-range maritime reconnaissance-bomber.
To meet Japanese requirements, the Focke-Wulf company began work on adapting the Fw 200B for maritime reconnaissance duties early in 1939, and the result was the Fw 200V10, destined to become the forerunner of the Fw 200C series of commerce raiders"
Source: Famous Bombers of the Second World War by William Green