Since there was no ladder or other way to climb down in that area, rescuers had to create a makeshift pulley system to lower themselves and pull the body out.
Police said when rescuers spotted him, he was barely breathing.
Ward’s right arm and neck broke in the fall. Rescuers tried to resuscitate him for about half an hour.
Police said they would contact the New Zealand embassy in Bangkok to take custody of the body.
The death railway, connecting Thailand and Burma, was built from 1940 to 1943 by civilian labourers and prisoners of war taken by the Japanese, to supply troops and weapons for Japan’s Burma campaign in World War II.
An estimated 180,000 to 250,000 Southeast Asian civilians and more than 60,000 Allied prisoners of war were subjected to forced labour during the construction. More than 100,000 of them died.