They tend to be relatively confident and believe themselves to have a relatively high degree of legitimacy. They also tend to have relatively low levels of religious persecution. It is also the case, however, that most of these countries have relatively high degrees of ethnic uniformity as well. Religion does not tend to play a politically divisive role, as it does in some other countries. Japan is a fairly good example of this first pattern.
Japan is a country with relatively little overt hostile persecution of religion.
In fact, in the postwar period it is arguable that Japan has swung a little bit too far the other way and has not adequately supervised the activities of some organizations that claim a religious identification and therefore some immunity from government inspection. The clearest example of that is Aum Shinrikyo, which engaged in a series of murders and gas attacks. These are things about which the police almost certainly had a relatively large amount of information well before the culminating attack on the subway in Tokyo. This has caused the government to exercise tremendous caution when dealing with religions. That has been, by and large, a healthy caution, though now the pendulum is swinging just a bit the other way to occasion some enhanced supervision.