Since the beginning of his pontificate, Pope Francis has invited the Church to renew itself by adopting a missionary style capable of overcoming the tendency to self-preservation and to welcome the challenges of contemporaneity. Being an "outgoing Church" means entering into a dialogic dynamic, which is open both to the announcement and to the listening to the others, even to those who believe differently. "Announcing" means attempting to reread and translate the Christian message, objectifying it in an unconventional way so that its meaning can be better grasped through the categories that are specific to other cultures. The intervention that I propose aims to take up the challenge of the announcement in a complex culture like the Japanese one that, despite the missionary effort, struggles to grasp the universalistic scope of Christianity, perceiving it as a Western religion for Westerners who approaches spiritual traditions such as Buddhism and Shintoism as one of the many paths that lead to the same goal: the truth that saves. The challenge consists in attempting to read the Christian teaching, transmitted by the Scriptures and outlined in its foundations by Systematic Theology, starting from a comparison with some interpretative categories of the Sōtō school of Zen, one of the most popular schools of Japanese Buddhism, trying to understand if and how such a reading can contribute to updating and strengthening the Christian testimony, in the awareness that "to testify" means to give concreteness to one's own convictions, presenting them as episteme of the search for truth, so that "the Church's customs, ways of doing things, times and schedules, language and structures can be suitably channeled for the evangelization of today's world " (EG n.27).