In Japan, Takayama Ukon was just beatified, but Christianity has rooted in Korea and not in Japan. It will take more than man’s work to change that, but rather a wind from God—a true kamikaze (which is what the word means), not the false ones of the past.
I read that post WW2 Japan was inundated by American missionaries, and after a few years of increase the Japanese partly abandoned Christianity due partly because they percieved hypocrisy on the part of the Westerners.
That’s the gist of what I read, anyway.