Grammar Rule in 30 Seconds
Use ～かねる to politely decline a request or express that something is impossible due to circumstances or personal inability.
- Attach to the stem (masu-stem) of a verb: {承る|うけたまわる} → {承り|うけたまわり}かねる.
- It implies a psychological or situational barrier, not just physical inability.
- It is highly formal and used primarily in business or customer service settings.
Overview
～かねる is a formal, advanced Japanese expression used to politely refuse an action or state that you are unable to perform it. Unlike a simple ～できない (cannot do), which indicates a lack of ability or opportunity, ～かねる communicates an inability stemming from internal principles, external policies, or situational inappropriateness. It conveys the nuance that the speaker cannot *bring themselves* to perform the action, often with a sense of regret.no without causing offense, as it frames the refusal not as a personal choice, but as an unavoidable outcome dictated by rules or circumstances. You'll encounter it in formal emails, official announcements, and delicate negotiations where maintaining harmony is critical.ご要望にはお応えしかねます (We cannot meet your request) is far more diplomatic than お応えできません, as it implies consideration and regret.Conjugation Table
| Form | Example (with {漢字 | 読み}) | Translation (Primary Nuance) | Usage Context | ||
|---|---|---|---|---|---|---|
| :--- | :--- | :--- | :--- | |||
| Dictionary Form | お答えしかねる |
Cannot answer (plain) | Used in written reports, internal monologue, or literary contexts. | |||
| Polite Form | お答えしかねます |
Cannot answer (polite) | The most common form. Standard for business, customer service, and formal speech. | |||
| Past Form (Plain) | お答えしかねた |
Could not answer (plain) | Narrative or reflective. I found myself unable to answer. |
|||
| Past Form (Polite) | お答えしかねました |
Could not answer (polite) | Formal reports on past events. We were regrettably unable to answer. |
|||
| Te-form | お答えしかねて、 |
Being unable to answer, and... | Links clauses. As we are unable to answer, we will investigate further. |
|||
Conditional (-ba) |
お答えしかねれば |
If one cannot answer | Formal and slightly stiff conditional. If we are unable to provide an answer... |
|||
| Negative Form | お答えしかねません |
(Not that one cannot answer) | Rare and easily misused. Can be an emphatic refusal. It does not mean I can answer. See Common Mistakes. |
How This Grammar Works
～かねる lies in its origin: the verb 兼ねる (かねる), which means to serve two or more functions concurrentlyor
to combine. For example, 朝食は昼食を兼ねる means breakfast also serves as lunch.This idea of duality is central. When you use
V-かねる, you imply a conflict between the requested action (V) and another role, duty, or principle you hold. You cannot concurrently satisfy the request and uphold your responsibility.～かねる is not for physical inability. You don't have a principled conflict with lifting a heavy box. You use it when a request clashes with your position.返金いたしかねます (I cannot process a refund) is implicitly stating: (As a representative of this company bound by its rules), I cannot process this refund.The inability is tied to their role. This removes personal agency from the refusal, making it objective and therefore polite.
その意見には同意しかねます (I cannot agree with that opinion), they are communicating that their own logic, ethics, or understanding prevents them from agreeing. It's not that they lack the mental capacity to understand the opinion; it's that they cannot reconcile it with their own position.
Formation Pattern
～かねる is consistent and straightforward. You attach it to the verb stem, also known as the 連用形 (ren'yōkei). This is the part of the verb that remains when you remove ～ます from the polite form.
u-syllable to its corresponding i-syllable.
言う (iu, to say) → 言い (ii) → 言いかねる (cannot say)
断る (kotowaru, to refuse) → 断り (kotowari) → 断りかねる (cannot refuse)
る.
決める (kimeru, to decide) → 決め (kime) → 決めかねる (cannot decide)
答える (kotaeru, to answer) → 答え (kotae) → 答えかねる (cannot answer)
する (suru, to do) → し (shi) → しかねる (cannot do)
来る (kuru, to come) → 来 (ki) → 来かねる (cannot come)
賛成する (to agree) follow the pattern for する, resulting in 賛成しかねます.
When To Use It
～かねる in situations requiring a high degree of formality and indirectness, where a direct refusal could be perceived as abrasive. Its use signals professional and social awareness.- Formal Refusals in Business & Customer Service: This is its primary domain. When denying a client's request or explaining a limitation, it is the standard choice.
ご期待には添いかねます。(We cannot live up to your expectations.)誠に恐縮ですが、これ以上の値引きはいたしかねます。(We sincerely apologize, but we cannot offer any further discount.)
- Expressing Principled Disagreement or Doubt: In a meeting or formal discussion, it allows you to voice reservations without being confrontational.
その計画の妥当性については、少々判断しかねます。(Regarding the validity of that plan, I find it somewhat difficult to judge.)その結論には賛成しかねる点がいくつかあります。(There are several points in that conclusion with which I cannot agree.)
- Delivering Bad News and Official Announcements: When an organization must communicate an inability to provide a service or guarantee an outcome,
～かねるmaintains a formal, responsible tone. 弊社としましては、一切の責任を負いかねます。(As a company, we cannot assume any responsibility.)個別の合否に関するお問い合わせにはお答えしかねます。(We cannot answer inquiries regarding individual pass/fail results.)
Common Mistakes
～かねる. Avoiding these errors is crucial for sounding proficient and not causing unintended confusion.- Crucial Error: Confusing
～かねるwith～かねない: This is the most dangerous mistake. The negative suffix-ないcompletely inverts the meaning into a statement of negative possibility.
～かねる | Cannot do (polite refusal) | その情報は公開しかねます。 (We cannot release that information.) |～かねない | Might do (negative potential) | その情報は誤解を招きかねない。 (That information might cause a misunderstanding.) |- Using for Physical Inability:
～かねるis for principled or policy-based inability, not physical limitations. Using it for the latter sounds bizarre, as if you have a philosophical objection to the action. - Incorrect:
このスーツケースは重くて、私は持ちかねます。(This suitcase is heavy, and I cannot carry it.) - Correct:
このスーツケースは重くて、私は持てません。
- Using in Casual Contexts: This expression is strictly for formal situations. Using it with friends will make you sound stiff, sarcastic, or comically out of place.
- Incorrect (to a friend):
ごめん、今夜は飲み会に行きかねる。(Sorry, I can't go to the drinking party tonight.) - Correct:
ごめん、今夜は飲み会に行けない。
- Misinterpreting the Negative Form
～かねません: The form～かねませんdoes *not* create a double negative meaningcan do.It is an extremely rare and emphatic way of reinforcing the refusal, essentially meaningit is not the case that I can do it.
For all practical purposes, avoid using it and never interpret it as a positive statement.
Contrast With Similar Patterns
cannot is a mark of advanced fluency. ～かねる has several close neighbors with important distinctions.～かねるvs.～できない: The most basic distinction.～できないis a neutral, factual statement of inability due to lack of skill, time, or permission.～かねるis a polite, formal refusal based on principle or policy, often implying regret.時間がなくてできません。(I can't do it because I don't have time.) — Factual.規定により対応しかねます。(Due to regulations, we cannot handle this.) — Principled.
～かねるvs.～がたい:～がたいexpresses that something is emotionally or psychologically difficult to do. It describes the inherent nature of the action, making it hard for anyone.～かねるdescribes the speaker's specific inability to act.彼が嘘をついたとは信じがたい。(It is hard to believe that he lied.) — Emotionally difficult.証拠がないので、彼の話を信じかねます。(As there is no proof, I cannot bring myself to believe his story.) — A principled refusal to believe.
～かねるvs.～にくい:～にくいdenotes that an action is physically difficult due to the properties of an object or situation. It has no connection to principle.このペンはインクが出にくくて、書きにくい。(This pen's ink doesn't flow well, so it's hard to write with.) — Physical difficulty.
～かねるvs.～わけにはいかない: Both can express inability due to circumstance, but～わけにはいかないemphasizes a social or circumstantial pressure that prevents you from doing something you might otherwise do.～かねるis more about a static, internal principle or rule.明日試験があるので、今日は遊んでいるわけにはいかない。(I have a test tomorrow, so I can't afford to be playing around today.) — Strong circumstantial pressure.
Real Conversations
Scenario 1: Business Email Refusing a Request
Context: A client asks for a feature to be developed on an impossibly short deadline.
Email Body:
ご依頼いただいた追加機能の件、承知いたしました。しかしながら、ご提示いただいた納期では十分な品質を担保した上での開発は、現状のリソースではいたしかねます。誠に恐縮ですが、スケジュールの再検討をお願いできますでしょうか。
Analysis: The phrase 開発はいたしかねます (we cannot develop) uses the humble form いたす to be exceptionally polite. It frames the refusal as a matter of professional principle (quality assurance) and resource limitations, not unwillingness.
Scenario 2: Formal Meeting Discussion
Context: A manager must tactfully reject a team member's suggestion to cut corners on a project.
Dialogue:
Team Member: テスト工程を省略すれば、納期を短縮できると思います。 (If we skip the testing phase, I think we can shorten the deadline.)
Manager
ご提案ありがとう。しかし、品質を犠牲にするような判断は、私としては承知しかねます。 (Thank you for the suggestion. However, as for me, I cannot approve a decision that would sacrifice quality.)Analysis: 承知しかねます (cannot approve/agree) is a firm but polite rejection. It clearly states the manager's refusal is based on the principle of maintaining quality, making the decision impersonal and professional.
Scenario 3: Customer Service Phone Call
Context: A customer wants to return a final sale item.
Dialogue:
Staff
申し訳ございません、お客様。こちらのセール商品は返品・交換の対象外となっておりますため、お受けしかねます。 (I am very sorry, but this sale item is not eligible for return or exchange, so we cannot accept it.)Analysis: お受けしかねます is a standard, polite formula in customer service. It clearly communicates the store policy is the reason for the refusal, expressing regret while remaining firm.
Progressive Practice
Contextual Judgment: Read the following. Is ～かねる the correct choice? Why or why not?
- A. (To a friend) ごめん、明日早いから、もう寝かねる。
- B. (In a company statement) 本件に関する個別の質問には回答しかねます。
- *Answer: A is incorrect; it's a casual context. B is correct; it's a formal, policy-based refusal.*
Sentence Transformation: Rephrase the following ～できません sentences into more polite and formal statements using ～かねます.
- A. その要求は受け入れることができません。
- B. この場で即座に決めることはできません。
- *Answer A: そのご要求はお受けいたしかねます。 Answer B: この場で即決いたしかねます。*
Differentiating Nuance: Choose the most appropriate verb ending for the context: ～かねる, ～かねない, or ～がたい.
- A. Such a tragic story is hard to believe. (信じ＿＿＿)
- B. Driving so fast on a rainy day might cause an accident. (事故を起こし＿＿＿)
- C. Due to privacy policy, I cannot provide that user's name. (お教え＿＿＿)
- *Answer: A: がたい, B: かねない, C: しかねます*
Production: You are a magazine editor. A writer has submitted an article that is well-written but does not fit your magazine's theme. Write a polite sentence explaining why you cannot publish it.
- *Example Answer: 素晴らしい記事ですが、弊誌のテーマとは方向性が異なるため、掲載はいたしかねます。*
Quick FAQ
～かねる for things I simply don't want to do?No. ～かねる requires a legitimate-sounding reason based on principle, policy, or logic. Using it simply because you don't feel like doing something (面倒だから、やりかねる) sounds unnatural and sarcastic. For personal preference, use ～たくない or plain negative forms.
見かねる (mikaneru)? It seems to be used differently.You're right. 見かねる is a common, somewhat idiomatic usage that means
to be unable to stand by and watch (something bad happening).It almost always implies that because you couldn't bear to watch, you intervened. Example:
彼が困っているのを見かねて、助け舟を出した。 (Unable to watch him struggling, I offered help.)
～かねる ever used to express indecision?Yes, this is a valid and common usage, tying back to the verb's origin of being caught between two things. Verbs like 決める (to decide) or 判断する (to judge) are often used this way. どちらの案を選ぶべきか、決めかねている means "I'm having trouble deciding which plan I should choose."
Conjugation of ～かねる
| Form | Japanese |
|---|---|
|
Present Polite
|
かねます
|
|
Present Plain
|
かねる
|
|
Past Polite
|
かねました
|
|
Past Plain
|
かねた
|
|
Te-form
|
かねて
|
Meanings
Used to express that one is unable to do something, often used to soften a refusal in formal contexts.
Formal Refusal
Politely declining a request.
“ご要望には{応じ|おうじ}かねます。”
“それは{認め|みとめ}かねる。”
Reference Table
| 动词词干 | 语法形式 | 含义 | 语境/语感 |
|---|---|---|---|
|
納得し
|
かねる
|
难以接受/认同
|
正式的反对意见
|
|
引き受け
|
かねます
|
无法承担/接受
|
专业的拒绝
|
|
決め
|
かねる
|
难以决定
|
表达犹豫不决
|
|
言い
|
かねます
|
难以启齿/不便透露
|
保守秘密或为难
|
|
いたし
|
かねます
|
无法做到
|
标准的谦让语拒绝
|
|
賛成し
|
かねる
|
难以赞成
|
外交辞令式的否定
|
|
見逃し
|
かねます
|
不能视而不见
|
指出违规行为
|
正式程度
受け入れかねます。 (Business meeting)
受け入れられません。 (Business meeting)
受け入れられないよ。 (Business meeting)
無理。 (Business meeting)
概念图：何时使用 ~かねる
社交语境
- 商务 Business
- 客户支持 Customer Support
语感
- {拒否|きょひ} Refusal
- {躊躇|ちゅうちょ} Hesitation
“不能”表达方式对比
决策树：我该用 ~かねる 吗？
是身体机能无法做到吗？
是正式或商务场合吗？
常用商务短语
邮件拒绝信
- • いたしかねます
- • お引き受けしかねます
正式异议
- • 賛成しかねます
- • 納得しかねます
按水平分级的例句
それは{でき|でき}かねます。
I cannot do that.
お答え{でき|でき}かねます。
I cannot answer that.
ご{希望|きぼう}には{添い|そい}かねます。
I cannot meet your request.
その{提案|ていあん}は{受け入れ|うけいれ}かねます。
I cannot accept that proposal.
今の{状況|じょうきょう}では{判断|はんだん}かねます。
I cannot judge in the current situation.
そのような{行為|こうい}は{容認|ようにん}しかねる。
Such behavior cannot be tolerated.
容易混淆
Sounds similar but means 'might happen'.
常见错误
走れかねる
走れない
食べかねる
食べられない
友達と遊びかねる
遊べない
雨が降りかねる
雨が降りかねない
句型
___は承りかねます。
Real World Usage
ご返信しかねます。
社交等级警告
职场生存指南
文化背景
Smart Tips
Always use 'masu' form.
发音
Pitch accent
Usually flat or falling on the 'ne'.
记住它
记忆技巧
Kaneru sounds like 'Can't-eru'. If you can't-eru, use kaneru!
视觉联想
Imagine a polite butler bowing while holding a tray that says 'NO' in elegant calligraphy.
Rhyme
When you want to say no with grace, use kaneru in its place.
Story
Mr. Tanaka was asked to jump off a bridge. He bowed and said, 'I'm afraid I cannot,' using the formal 'tobikane-masu'. Everyone understood his polite refusal.
Word Web
挑战
Write three sentences refusing a fake request from your boss using 'kaneru'.
文化笔记
Refusal is an art. Using 'kaneru' saves face for both parties.
Derived from the verb 'kaneru' (to combine/to be unable).
对话开场白
Can you do this task?
日记主题
常见错误
Test Yourself
ご要望には、お応え（ ）。
Choose the correct sentence to express 'I cannot agree with that conclusion' in a meeting:
Fix the error: 返品はいたすかねます。
Score: /3
练习题
1 exercisesその件は承り___。
Score: /1
Practice Bank
5 exercisesどちらにするか、まだ（ ）。
如何表达“我司无法承担该责任”？
Translate to Japanese using ~かねる: 'I cannot agree.'
“见逃す”和“かねる”的正确组合是？
选择“无法做到”的更礼貌版本：
Score: /5
常见问题 (1)
No, it is too formal.
Scaffolded Practice
1
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
No poder
Register.
Ne pas pouvoir
Politeness.
Nicht können
Directness.
できない
Formality.
لا أستطيع
Register.
不能
Nuance.
Learning Path
Prerequisites
相关视频
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