expression
the die is cast; there is no going back
Idiomatic expression equivalent to Latin 'alea iacta est', used when an irrevocable decision has been made.
退職届を出した。賽は投げられた。
I submitted my resignation. The die is cast.
もう後戻りはできない。賽は投げられたのだ。
There's no turning back now. The die has been cast.
Calque of Latin 'alea iacta est', attributed to Julius Caesar. The Japanese phrase uses 賽 (dice) and the passive form of 投げる (to throw).