These qualities don't seem to have allowed any of them to run their countries exceptionally well. If you want to construct a high rationality country, I don't think that any of these three would be particularly good starting points.

Japan at least manages to rank highly on many societal health indices, but their educational system tends to emphasize rote memorization and prestigious affiliation over original thinking and personal achievement.

Between countries, differences in mean intelligence are almost certainly going to be trivial in comparison with differences in social values. You'd want to look, not at which countries tend to have smarter people, but which promote more rationalist-friendly values.