Film sheds light on poison gas factory

Japan's wartime chemical weapons killed untold thousands in China

TOKYO - A new documentary film about Okunoshima, an island where Japan manufactured poison gas for its 1937-45 war of aggression against China, is attracting a great deal of attention.

Recently televised by the Tokyo Broadcasting System, the documentary comes on the heels of another one about Japan's infamous Unit 731, released earlier by public broadcaster NHK.