Are humanism and Christianity mutually exclusive?

[Okay, maybe Mike Johnson is a competent parliamentarian.]

Is "atheist" really the important bit here, rather than "secular" or "irreligious"? Theism is a technical characteristic of some currently very widespread religions that tends to get treated as more fundamental than it is in societies traditionally dominated by religions that feature it. It isn't really causally connected to questions about things like how "thick" a religion's cosmology and truth-claims about the universe are, how stringent its moral prescriptions are, or how readily it's pressed into service as a tool of social control, yet in the Western world it's commonly discussed as if it is.

[Okay, maybe Mike Johnson is a competent parliamentarian.]

39% seems high for Japan considering what its religious traditions are. I wonder how the question was worded in Japanese.