why did japanese carry out operation sook ching

 SOOK CHING MEANS PURGE THROUGH CLEANSING in chinese.Dai Kensho means great inspection 
 first,the japanese military were suspicious about the chinese in singapore as they had a long fighting between china and japan in 1937

 second,many of the japanese commanders and soldiers were verterans of campaigns in other parts of asia where violence and executions were regularly used as toolsto keep civilian populatioin under control. 

 third,the japanese wanted to prevent anti japanese elements from interfering with their occupation of singapore after experiencing resistance by chinese volunteers and guweeillas during the malayan campaign

video time watch all it tells you about how japanese kill the chinese and how china fight back in order to get back their own country