Hellfire Pass (Thai: ช่องเขาขาด, known by the Japanese as Konyu Cutting) is the name of a railway cutting on the former Burma Railway ("Death Railway") in Thailand which was built with forced labour during the Second World War, in part by Allied prisoners of war. The pass is noted for the harsh conditions and heavy loss of life suffered by its labourers during construction. Hellfire Pass is so called because the sight of emaciated prisoners labouring at night by torchlight was said to resemble a scene from Hell.