now that it's come to this; since things have reached this point
A formal, somewhat literary expression used to introduce a decisive action or resolution after a situation has developed to a critical stage. Often followed by a statement of determination or an unavoidable consequence.
Now that it's come to this, we have no choice but to fight to the end.
Since things have reached this point, you should speak honestly.
Standard kana-kanji mixed spelling; the most common written form.
Literary or formal kanji spelling using 斯; rarely used in modern writing.
Derived from the classical Japanese adverb かく (thus, in this way) + なる (attributive form of なり, classical copula) + 上は (since, now that). The phrase literally means 'since it is thus,' and has been used since the Heian period.