The latter half of the “Christian Century” is characterized by the fierce competition between the Jesuits and the Mendicants. Diego Collado was the chief figure of the Dominican mission in Japan. Soon after his arrival from Manila in 1619, Collado plunged in missionary work. When he returned to Europe in 1622, he also promoted the publishing of language oriented instruction manuals on procuring the permission of the newly established Sacra Congregatio de Propaganda Fide in Vatican. Concurrently, he advocated the idea of establishing multiple dioceses to topple the iconic Jesuit-bred bishop of Japan. As a counter to his campaign, Jesuit Procurador Sebastião Vieira strategically dedicated the Christians’signatured documents to the Pope and planned the publication of reports glorifying martyrs. Dominicans as well as Jesuits took turns to lobby for donations and, protection/extension of their jurisdictions to the Papacy, based on achievements over the “Japanese Vineyards". Gaining the Pope’s partial approval, Collado succeeded in recruiting 30 comrades from Europe and led them to Manila with ambitions of advancing into Japan in 1635.
Previous academic narratives mainly treat the above episode from the approaches of negotiations between Collado and the Propaganda Fide. To the existing discussion, this paper aims to include the counteractions of the Jesuits by using unpublished documents preserved in European archives. This will amplify the scope and depth thereof by providing new evidence on conflicts among States, Catholic Orders and the Papacy which resulted in the eventual doom of either missionary prospects.