A golden opportunity; an excellent chance to do something — the best possible timing to act.
今こそ海外進出の絶好機だ。
Now is the perfect opportunity to expand overseas.
投資するにはこれが絶好機だと思う。
I think this is a golden opportunity to invest.
チャンスを逃さず、絶好機に決断した。
Not missing the chance, I made a decision at the perfect moment.