When Jesuit missionaries began arriving in Japan in the sixteenth century, they brought not only a new religion, Christianity, but also several domestic and exotic animals. Not only did these animals provoke feelings of curiosity and wonder, but they became a site of epistemic contestation between Christian and Buddhist views on human‐animal relations. In Buddhist thought, humans and animals were conceived of as interrelated, as both were thought to be trapped in an endless cycle of death and rebirth. On the other hand, in Christian thought, humans and animals were stratified according to Aristotelian hierarchies, according to which the former were viewed as superior to the latter. After the Jesuits arrived in Japan, it soon became clear that their proselytes' pre‐existing modes of relating to and classifying the natural world would need to be converted to Aristotelian ones in order to propagate a Christian way of life. Thus, animals became a central part of Jesuit evangelism. Many of these creatures were deployed as tribute gifts, which altered the emotional landscape between the European and Japanese humans who used them as a buffer. This paper explores how animals, wonder, and religious epistemologies intersected to transform Japanese Christian attitudes towards animals during the Jesuit Mission to Japan.