You have to put your self in the shoes of the japanese; to them, bowing is the equivilent of a hand shake. Just because your'e bowing to something, doesnt mean youre worshiping it. You worship from youre heart. For example: say you're singing in church; just because youre singing, doesnt mean youre worshiping, you have to put your heart into it, and mean what youre singing in order to be truely worshiping.
Well... that's my (christian) perspective on it anyway.