the common characteristic of the japanese passive is that the event is not under the control of those affected by it.
In general, when a passive sentence is used, it's about the person/thing which is affected by the event, and when what is affected is human, the sentence takes the viewpoint of the person rather than the agent of the event.

honorific polite expressions und humble polite expressions

formal and informal styles are independent of the honorific-, humble-, and neutral-polite distinctions.

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