This is because, I think, the #philosophical backing exists in the EN-speaking cultural/societal framework (namely, methinks, this direct relationship between an individual and god/higher being).
The worldview that form the backbone of JP-speaking world is more societally multi-contextual. (I'm not a sociologist so I'm winging this as I go along.) This is to say, one's existence is defined by where one sits in the societal (feudal) hierarchy.
Obviously this is simplifying a lot, but
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