The invasion and the subsequent occupation of the Philippines by the Japanese during Second World War forced many Filipinos to collaborate with the enemy. This collaboration which took place in the forms of political, economic, cultural and military collaboration, and committed in varying degrees, was underlined by the need to survive. This thesis discusses the causes of political collaboration with the Japanese, the arguments of top political collaborators and the factors which led to the declaration of an amnesty in 1948. As a postcript, this thesis examines the effects of the colaboration issue in the postwar period.