N2 — outside your level filter
write + since
kaku kara ni wa
since; now that — a stated premise makes a firm conclusion unavoidable
一度引き受けたからには、途中で投げ出したりしないよ。
ichido hikiuketa kara ni wa, tochuu de nagedashitari shinai yo.
Now that I've taken this on, I'm not going to bail out halfway through. casual
日本に住むからには、日本語を話せるようになったほうがいい。
nihon ni sumu kara ni wa, nihongo o hanaseru you ni natta hou ga ii.
Since you're going to live in Japan, you're better off becoming able to speak Japanese. neutral