Takashi Nagase (永瀬 隆? Nagase Takashi, c. 1918/19 – 21 June 2011) was an interpreter of the Ministry of War of Japan. He was born in 1918/19 in Kurashiki, Okayama, Japan. He learned English from an American Methodist in a college in Tokyo. He was one of the officers in charge of the construction of the "Death Railway" which ran between Thailand and Burma and included the famous bridge over the River Kwai, and is known for the use of forced labour of Allied prisoners of war, though the majority of the labour (and resultant deaths) was incurred by romusha, or local civilians pressed into labour.
Nagase was first introduced to the British public in the documentary made by ex-POW John Coast about the realities of life on the Thai-Burma Railway, which was first broadcast in the UK on BBC2 on 15 March 1969. It was repeated on BBC1 on 4 August 1969 and again on Boxing Day 1974. The documentary was an early colour broadcast and part of the series One Pair of Eyes. Return to the River Kwai featured interviews with Nagase and two other Japanese soldiers who had worked with the prisoners on the railway. Nagase acted as both interpreter for the two other soldiers and interviewee. A transcript of the documentary and Nagase's responses to Coast's questions about the treatment of the POWs and some of the Japanese accused of war crimes after the war (plus some of Nagase's responses that did not make it into the final edit of the documentary) can be found in the new 2014 edition of Coast's book "Railroad of Death" originally published in 1946.
Nagase was also noted for his reconciliation with former British Army officer Eric Lomax, whom he interrogated and tortured at a Japanese prisoner-of-war camp in 1942. Lomax then went on to discuss his reconciliation and eventual friendship with Nagase in his autobiography, The Railway Man. The book chronicled his experience before, during, and after the Second World War. It won the 1996 NCR Book Award and the J. R. Ackerley Prize for Autobiography.