conjunction
because; the reason is that
A formal or literary conjunction used to introduce a reason or explanation, similar to 'なぜなら' but somewhat more bookish.
彼は来ないだろう。何となれば、もうこんな時間だからだ。
He probably won't come, because it's already this late.
この計画は中
This plan should be canceled, because the budget is insufficient.