It is no secret that Japan’s population has begun to decline. While the government makes serious efforts to encourage childbirth, the reality of a declining population continues to set in. I saw a map on Twitter today laying out this point in full color: #Japan population change map 2015-2018 Blue = decline Red = growth Growth hot spots in Tokyo, Nagoya, Osaka and Fukuoka pic.twitter.com/0Ei32aW11l — shootjapan (@ShootOsaka) April 13, 2019 As I reflected on this map, it got me to thinking about the percentage of Christians in Japan. The Christian population could technically rise in the coming years: assuming stable numbers among Christianity, a declining population would mean a…