だろうと (darou-to): Even if; no matter whether
～だろうと (darou-to)
Meaning
Even if; no matter whether
Formation and usage
N／な-adjective + だろうと; V／い-adjective plain + だろうと
Notation: N = noun; V dictionary = dictionary-form verb; V stem = the stem before ます; plain clause = plain-form clause; negative stem = the form before ない. Follow the attachment shown above.
Explanation
Used concessively rather than simply predictively, often with a firm conclusion or denial of exemptions.
Examples
相手が教師だろうと、同じ基準で判断する。
Even if the other person is a teacher, I use the same standard.
相手が医師だろうと、同じ基準で判断する。
Even if the other person is a doctor, I use the same standard.
相手が指導者だろうと、同じ基準で判断する。
Even if the other person is a leader, I use the same standard.
相手が経営者だろうと、同じ基準で判断する。
Even if the other person is a manager, I use the same standard.
相手が政治家だろうと、同じ基準で判断する。
Even if the other person is a politician, I use the same standard.
How related patterns differ
にしろ, であれ, だろうと, and ようが can all concede a condition. Repetition lists alternatives; としても assumes one condition. いかに～ても emphasizes degree, while とあれば introduces a special condition motivating action.