expression
in either case; in all cases
Formal expression used to state that something holds true regardless of the situation or option. Often found in legal, business, or written contexts.
いずれの場合においても、規則に従ってください。
In all cases, please follow the rules.
いずれの場合においても、結果は同じです。
In either case, the result is the same.
Compound of いずれ (which, whichever) + の + 場合 (case, situation) + においても (even in, in). The phrase is a formal, fixed expression.