Conditionals and Hypotheses
Formal 'Even If' for Judgments and Opinions
The pattern にせよ is a highly formal expression used to say 'even if' or 'even assuming that' something is true. It is used to concede a specific condition or fact while emphasizing that the speaker's main judgment, advice, or evaluation still holds regardless. Because of its stiff and dramatic tone, it is primarily used in writing, formal speeches, or serious discussions, and is generally avoided in casual conversation.
01Main Functions
Conceding a Point
You can use にせよ to acknowledge a condition or fact, stating that even if it is true, the main point remains unchanged.
忙しいにせよ、連絡くらいはするべきだ。
Even if (you) are busy, (you) should at least contact (me).
Combining with Question Words
When paired with question words like なに or どんな, にせよ expresses 'no matter what' or 'whatever the case may be', followed by a strong conclusion.
どんな理由があったにせよ、ルールを破ったのはよくない。
Whatever the reason may have been, breaking the rule is not good.
Expressing Subjective Judgment
The clause that follows にせよ must contain the speaker's subjective stance, such as a judgment, advice, warning, or opinion, rather than a simple objective fact.
冗談にせよ、言っていいことと悪いことがある。
Even if it is a joke, there are things (you) can and cannot say.
02Sentence Pattern
verb (dictionary form) + にせよ
失敗するにせよ、挑戦することに意味がある。
Even if (you) fail, there is meaning in challenging (yourself).
Attaches directly to the dictionary form of a verb to state a future or hypothetical condition.
verb in negative ない form + にせよ
行かないにせよ、早めに返事をするべきだ。
Even if (you) do not go, (you) should reply early.
Attaches to the negative nai-form to express 'even if you do not' do an action.
verb (ta-form) + にせよ
彼が間違っていたにせよ、あのような言い方はよくない。
Even if he was wrong, that way of speaking is not good.
Used with the past ta-form to concede a condition or fact from the past.
noun + にせよ
冗談にせよ、言っていいことと悪いことがある。
Even if it is a joke, there are things (you) can and cannot say.
にせよ can attach directly to a noun. This is common with words expressing concepts, status, or degrees.
noun + である + にせよ
社長であるにせよ、法律は守らなければならない。
Even if (one) is the company president, the law must be obeyed.
Adding である between the noun and にせよ makes the expression sound even more formal and objective.
na-adjective + にせよ
不便にせよ、安全が第一だ。
Even if it is inconvenient, safety is the first priority.
Attaches to the na-adjective without な.
na-adjective + である + にせよ
不便であるにせよ、安全が第一だ。
Even if it is inconvenient, safety is the first priority.
Adding である between the na-adjective and にせよ makes the concession sound highly formal and objective.
i-adjective + にせよ
忙しいにせよ、連絡くらいはするべきだ。
Even if (you) are busy, (you) should at least contact (me).
Attaches directly to the dictionary form of an i-adjective.
03Example Sentences
忙しいにせよ、連絡くらいはするべきだ。
Even if (you) are busy, (you) should at least contact (me).
Attaches to an i-adjective. The second clause contains the speaker's advice or judgment about an obligation.
冗談にせよ、言っていいことと悪いことがある。
Even if it is a joke, there are things (you) can and cannot say.
Attaches directly to a noun. This is a very common phrase used to deliver a moral judgment or warning.
どんな理由があったにせよ、ルールを破ったのはよくない。
Whatever the reason may have been, breaking the rule is not good.
Paired with the question word どんな to express "whatever the case may be" before stating an absolute judgment.
失敗するにせよ、挑戦することに意味がある。
Even if (you) fail, there is meaning in challenging (yourself).
Attaches to the dictionary form of a verb to state a judgment regarding a hypothetical future condition.
行かないにせよ、早めに返事をするべきだ。
Even if (you) do not go, (you) should reply early.
Attaches to the negative nai-form of a verb, advising someone of their obligation even if they choose not to do an action.
彼が間違っていたにせよ、あのような言い方はよくない。
Even if he was wrong, that way of speaking is not good.
Attaches to the past ta-form of a verb. The speaker concedes a past fact but still offers a critical evaluation.
社長であるにせよ、法律は守らなければならない。
Even if (one) is the company president, the law must be obeyed.
Using である between the noun and にせよ makes the concession sound highly formal and objective.
不便にせよ、安全が第一だ。
Even if it is inconvenient, safety is the first priority.
Attaches directly to the na-adjective without な to state an opinion despite a negative condition.
計画を変更するにせよ、まずは上司に相談しなければならない。
Even if (we) change the plan, (we) must consult the boss first.
A formal business example stating a necessary procedure regardless of the hypothetical change.
事実であるにせよ、証拠がなければ信じることはできない。
Even if it is a fact, (I) cannot believe it without evidence.
Attaches to a noun with である, acknowledging a claim while maintaining a strict personal stance.
知らなかったにせよ、責任を取る必要がある。
Even if (you) did not know, it is necessary to take responsibility.
Attaches to the past negative form of a verb. Ignorance of a past fact does not change the speaker's judgment about responsibility.
だれが言ったにせよ、その噂は信用できない。
No matter who said it, that rumor cannot be trusted.
Paired with the question word だれ to express "no matter who" before a strong subjective evaluation.
04Comparisons
にせよ vs. にしろ
Both grammar points share the exact same meaning of "even if" or "even assuming that" and expect the speaker's judgment in the second half of the sentence. However, にしろ is slightly less formal. While にせよ is highly formal and mostly used in writing or very stiff speeches, にしろ bridges the gap and can be heard more comfortably in serious spoken Japanese.
どちらにしろ、明日までに決める必要がある。
Whichever it is, it is necessary to decide by tomorrow.
にせよ vs. にしても
にしても is the most common and natural conversational equivalent for "even if" or "even considering that." If you are speaking with friends, colleagues, or even polite acquaintances, you should almost always use にしても. Using にせよ in casual or everyday conversational situations sounds unnaturally stiff and overly dramatic.
忙しいにしても、一言言ってほしかった。
Even if (you) are busy, (I) wanted (you) to say a single word.
05Nuance and Usage
The grammar pattern にせよ carries a very stiff, dramatic, and literary tone. It is used to concede a point—admitting that a hypothetical or actual condition might be true—while firmly standing by your ultimate conclusion. It effectively says, "I will grant you that point, but my judgment remains exactly the same." Because of its heavy tone, it is perfectly suited for essays, news commentary, formal business documents, and serious political or academic speeches. Conversely, using it in casual everyday life sounds out of place and overly theatrical.
A critical rule of にせよ is that the second half of the sentence cannot simply describe an objective fact or a straightforward action. For example, you cannot say "Even if it was rainy, he came." Instead, the main clause must deliver the speaker's subjective stance. This means you will almost always see にせよ followed by expressions of obligation, advice, warning, or strong opinion, such as べきだ, meaning "should", なければならない, meaning "must", or よくない, meaning "is not good".
You will also frequently see にせよ paired with question words like どんな, meaning "what kind of", だれ, meaning "who", or なに, meaning "what". In these cases, it creates the meaning of "no matter what" or "whatever the case may be." This combination is a powerful rhetorical tool for setting an absolute, unbreakable condition before delivering a strict moral judgment or an unwavering rule, such as declaring that no matter the excuse, breaking the law is unacceptable.
06Core Explanation
The pattern にせよ is a highly formal expression used to say 'even if' or 'even assuming that' something is true.
The grammar pattern にせよ is an advanced, highly formal expression used to say "even if" or "even assuming that" something is the case. It is used to concede a specific point—acknowledging that a certain condition might be true or might happen—while emphasizing that this condition does not change the speaker's main conclusion. It is a stiffer, more literary counterpart to the conversational にしても.
One of the strict rules for using にせよ is what must follow it. The second half of the sentence cannot be a simple objective fact. Instead, it must contain the speaker's subjective stance. This usually takes the form of a judgment, an opinion, advice, a warning, or a statement of obligation, often ending with expressions like べきだ or なければならない. You are essentially saying that regardless of the condition, your evaluation remains exactly the same.
Because of its formal tone, にせよ is rarely used in casual, everyday conversation. You will primarily encounter it in formal writing, essays, news commentary, serious business contexts, or formal speeches. If you use it while chatting with friends, it will sound unnaturally stiff and dramatic. For spoken Japanese or everyday situations, にしても or にしろ are much more natural choices for expressing the same idea.
にせよ is frequently paired with question words such as だれ, meaning "who", なに, meaning "what", どこ, meaning "where", or どんな, meaning "what kind of". When used this way, the meaning shifts slightly to "no matter who", "whatever happens", or "whatever the reason". This combination is highly effective for setting an absolute condition before delivering a strong, unwavering opinion or moral judgment, such as stating that breaking a rule is unacceptable no matter the excuse.
In terms of structure, にせよ is quite flexible. It attaches directly to the short forms of verbs and i-adjectives, including past and negative forms. For nouns and na-adjectives, it can attach directly, but it is very common to place である between the word and にせよ, such as "noun + である + にせよ" or "na-adjective + である + にせよ". Using である adds an extra layer of formality and weight to the sentence, which fits perfectly with the serious nature of this grammar point.
07Common Mistakes
Wrong
（友達に）雨が降るにせよ、遊びに来てね。
Correct
（友達に）雨が降るにしても、遊びに来てね。
Why: にせよ is a highly formal expression used in writing or serious speeches. Using it in a casual conversation with a friend sounds unnaturally stiff. にしても is the natural choice for everyday spoken Japanese.
Wrong
雨が降るにせよ、試合は行われました。
Correct
雨が降るにせよ、試合は行われるべきだ。
Why: The clause following にせよ cannot be a simple report of an objective fact or a past event. It must express the speaker's subjective stance, such as an opinion, judgment, or statement of obligation.
Wrong
冗談だにせよ、言っていいことと悪いことがある。
Correct
冗談にせよ、言っていいことと悪いことがある。
Why: にせよ cannot attach directly to the casual copula だ. It must attach directly to the noun itself, or you can use である (冗談であるにせよ) for added formality.
Wrong
不便だにせよ、安全が第一だ。
Correct
不便にせよ、安全が第一だ。
Why: Just like with nouns, にせよ attaches directly to the na-adjective without な. Adding だ before にせよ is ungrammatical.
Wrong
行きませんにせよ、早めに返事をするべきだ。
Correct
行かないにせよ、早めに返事をするべきだ。
Why: にせよ attaches to the short forms of verbs, such as the dictionary form, nai-form, or ta-form. It cannot attach to polite forms like ます or ません.
Wrong
彼が間違っていたにせよ、彼は謝りませんでした。
Correct
彼が間違っていたにせよ、あのような言い方はよくない。
Why: You cannot follow にせよ with a simple statement of what someone did or did not do in the past. The sentence must conclude with your evaluation or judgment of the situation.
08Questions
Can I use にせよ in everyday conversation?
No. にせよ has a very stiff, dramatic, and literary tone. Using it in casual conversation with friends or even polite daily interactions will sound unnatural. For everyday spoken Japanese, use にしても instead.
What is the difference between にせよ and にしろ?
Both share the exact same meaning of "even if," but にしろ is slightly less formal. While にせよ is heavily restricted to formal writing and serious speeches, にしろ bridges the gap and can be heard more comfortably in serious spoken contexts.
Why can't I end a にせよ sentence with a simple past event?
The core function of にせよ is to contrast a conceded condition with your personal evaluation. If you simply state an objective fact (like "Even if it was rainy, the game was held"), you are missing the subjective judgment that にせよ requires. The sentence must conclude with an opinion, advice, or statement of obligation (like "Even if it rains, the game should be held").
Is it mandatory to use である with nouns before にせよ?
It is not strictly mandatory; にせよ can attach directly to a noun (such as 冗談にせよ). However, using である (such as 冗談であるにせよ) is very common because it adds an extra layer of formality and objectivity that matches the serious tone of the grammar point perfectly.
09Mini Practice
- 01
冗談（ ）、言っていいことと悪いことがある。
- 02
どんな理由が（ ）、ルールを破ったのはよくない。
- 03
忙しい（ ）、連絡くらいはするべきだ。
- 04
社長（ ）にせよ、法律は守らなければならない。
- 05
Even if you fail, there is meaning in challenging yourself.
Tap the pieces in the correct order.
- 06
Even if you do not go, you should reply early.
Tap the pieces in the correct order.
- 07
（友達との会話で）忙しいにせよ、今度の週末は遊ぼうよ。
- 08
（論文で）どんな理由があったにせよ、暴力は許されない。
Summary
Learner Summary
- にせよ is a highly formal grammar pattern meaning "even if" or "even assuming that."
- It is used to concede a point while emphasizing that the speaker's main judgment or opinion remains unchanged.
- The second half of the sentence must contain a subjective evaluation, advice, or judgment, rather than a simple objective fact.
- It attaches to the short forms of verbs and i-adjectives. For nouns and na-adjectives, it attaches directly or follows である for added formality.
- Because of its stiff and dramatic tone, it is primarily used in writing and formal speeches, not in casual everyday conversation.
- It is often paired with question words like どんな or だれ to mean "no matter what" or "no matter who."
10Study Map
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