In the frigid winter of 1937, the Imperial Japanese army stormed Nanjing and carried out one of the most barbaric atrocities in its war of aggression against China – the Nanjing Massacre. More than 300,000 civilians and disarmed soldiers were killed over the span of six weeks.

The scale of the massacre still casts a long shadow compounded by Japan's historical denial. In Tokyo, right-wing factions continue to visit the Yasukuni Shrine, a symbol of Japanese militarism for enshrining convicted Class-A war criminals.

Among reams of records documenting the Nanjing Massacre atrocities, one name stands out: Hisao Tani, a Japanese Class-B war criminal whose troops led the first assault on the city. Drawing on court verdicts, eyewitness testimony and archival photographic evidence, this video traces his path from cruel slaughterer to justice served, affirming that crimes never stay buried for too long and that justice will be done.