乗のりかかった船ふね

expression

in for a penny, in for a pound; having gone too far to turn back

Idiomatic expression used when one is already committed to a course of action and might as well see it through, even if it becomes difficult. Literally 'a ship one has already boarded'.

• もうここまで来きたら乗のりかかった船ふねだ。最さい後ごまでやろう。

  We've come this far; we're in for a penny, in for a pound. Let's see it through to the end.

• 乗のりかかった船ふねだから、このプロジェクトを途と中ちゅうでやめるわけにはいかない。

  Since we've already committed, we can't just abandon this project halfway.