Diego Collado was a Christian missionary born in the late sixteenth century at Miajadas, in the province of Extremadura, Spain. He entered the Dominican Order at Salamanca around 1600, and in 1619 went to Japan. His account of what he saw in Japan was cited by Thomas Gage, a former Dominican friar turned Protestant, as evidence of Jesuit malpractice and the conflict between Dominicans and Jesuits.
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Source: Wikipedia