にしろ～にしろ・
にしろ～にしろ and にせよ～にせよ present two alternatives and say that the same conclusion holds whichever one applies. They often translate as “whether A or B” or “regardless of whether A or B.”
One conclusion for both alternatives
The point is not simply to list two possibilities. The statement after the pair must remain true in either case. The alternatives are commonly opposites, different choices, or two possible situations.
Noun and verb alternatives
Notice that each alternative has the same grammatical shape and repeats the same ending.
Choosing between the two versions
にしろ is natural in conversation as well as writing, especially when giving firm advice, requirements, or judgments. にせよ gives the same basic meaning but suits formal discussions, policies, and careful written explanations more readily.
Nearby patterns
にしても～にしても shares much of the same core meaning and is often interchangeable, but it commonly sounds softer, as if considering two representative cases. The distinction is a tendency rather than a strict rule. であれ～であれ is more elevated and is especially suitable for formal principles that apply regardless of category or status.
正社員であれ契約社員であれ、同じ安全基準を守る必要がある。
Whether someone is a permanent employee or a contract employee, the same safety standards must be followed.
AnalyzeThis is the more elevated category-based pattern, shown here only for contrast.
More examples
参加するにしろ欠席するにしろ、金曜日までに連絡してください。
Whether you attend or not, please contact us by Friday.
Analyze国内で行うにせよ海外で行うにせよ、十分な準備が必要だ。
Whether it is held domestically or overseas, thorough preparation is necessary.
Analyze結果が良いにしろ悪いにしろ、まず事実を確認しよう。
Whether the outcome is good or bad, let us first confirm the facts.
Analyze本人が来るにせよ代理人が来るにせよ、身分証明書を提示しなければならない。
Whether the person concerned comes or a representative does, identification must be presented.
Analyze冗談にしろ本気にしろ、そんな言い方は失礼だ。
Whether it was a joke or meant seriously, saying it that way is rude.
Analyze受け入れるにせよ拒否するにせよ、判断の根拠を記録に残すべきだ。
Whether the decision is to accept or reject, the basis for it should be recorded.
Analyze