“The Society of Jesus Japanese Report Collection” has been analyzed from early times. I’ll report on 16th and 17th century Christianity from the angle of the area science-colony forming viewpoint. The existence of Amakusa College was confirmed from that book, but there is no established theory. It was proven that Kawachiura, in a narrow sense, is the location of Amakusa by the effort of historians in 1990. But the exact location remains unknown. I present a hypothesis about the location and the constitution of Christian facilities in Kawachiura.