であれ~であれWhether A or B; regardless of category
であれ~であれ formally presents two categories, statuses, or conditions and says that the same rule, judgment, or principle applies to both.
One conclusion for both alternatives
The two alternatives are treated as formal categories. The main clause then deliberately ignores the difference between them: whichever category applies, the conclusion remains unchanged. This makes the construction especially suitable for equal treatment, universal duties, and rules with no category-based exception.
A rule applying to two groups
学生であれ社会人であれ、この図書館の利用規則を守らなければならない。
Whether one is a student or a working adult, one must follow this library's rules.
AnalyzeThe duty is identical for both formally named groups.
Statuses and qualities
The alternatives may be social or organizational statuses, or suitable na-adjective stems describing different conditions.
Close alternatives
であれ~であれ is compact and strongly suited to formal categories. であろうと~であろうと has substantial overlap, but makes the hypothetical concession fuller and more rhetorical. にしろ~にしろ and にせよ~にせよ are less elevated and can handle a wider range of verbs and adjectives.
相手が大企業であろうと小規模な組織であろうと、交渉の原則は変わらない。
Whether the other party is a major corporation or a small organization, the principles of negotiation do not change.
AnalyzeThe fuller form gives the concession slightly more rhetorical weight.
More examples
国内企業であれ外国企業であれ、本法の適用条件は同じである。
Whether a company is domestic or foreign, the conditions for application of this law are the same.
Analyze専門家であれ一般市民であれ、公開資料を閲覧する権利は等しく保障される。
Whether one is an expert or an ordinary citizen, the right to view public materials is equally guaranteed.
Analyze有名であれ無名であれ、応募者は同一の基準で審査される。
Whether famous or unknown, applicants are evaluated according to the same criteria.
Analyze個人であれ団体であれ、申請には所定の書類が必要である。
Whether the applicant is an individual or an organization, the designated documents are required.
Analyze成功であれ失敗であれ、実験の結果は正確に記録しなければならない。
Whether an experiment succeeds or fails, its results must be recorded accurately.
Analyze理論的であれ実践的であれ、研究には検証可能な根拠が必要である。
Whether theoretical or practical, research requires evidence that can be verified.
Analyze