An extremely graphic portrayal of the war crimes perpetrated by the Japanese     Imperial Army upon the Chinese military and civilian population of Nanking, in   which 300,000 individuals were brutally tortured and killed. Part war film,      part documentary, part propaganda piece, part gruesome and potentially         offensive splatter film, Black Sun takes a long, hard look at one of the darkest moments in modern human history, mixing fictional portrayals with real photographs and footage of some of the events described.  Cantonese/Chinese      T.F. Mou---Hong Kong---1995---91 mins.