The habit is analogous to the use of our phrase "speaking of,"-- that is, simply an emphatic mode of introducing a fresh thought; only that with them, the practice being the rule and not the exception, no correspondingly abrupt effect is produced by it.

Ousted thus from the post of honor, the subject is not even permitted the second place.
Indeed, it usually fails to put in an appearance anywhere.

You may search through sentence after sentence without meeting with the slightest suggestion of such a thing.

When so unusual an anomaly as a motive cause is directly adduced, it owes its mention, not to the fact of being the subject, but because for other reasons it happens to be the important word of the thought.

The truth is, the Japanese conception of events is only very vaguely subjective.