Studying Japanese Ep.1000~1099
信じられない いったいどういうこと 冗談でしょ 思いもしなかった ありえない
In this lesson, we explore five more high-frequency spoken Japanese expressions used when encountering absurd, baffling, or astonishing situations. Whether reacting to mind-blowing news or a sudden strange turn of events, these phrases will make your Japanese sound authentic, natural, and expressive.
- ✅ Learn 5 brand-new spoken reaction phrases
- ✅ Master emotional nuance, spoken contractions, and pitch tones
- ✅ Understand detailed grammar breakdowns and real-world usage
Introduction
Native Japanese speakers rarely rely on stiff, textbook formulas like 「それは本当ですか？」 (Is that true?) when faced with genuine shock or disbelief. Instead, they lean into short, punchy, emotionally rich phrases that capture their immediate reaction.
Mastering these five expressions will equip you with a versatile repertoire for expressing disbelief, confusion, and utter amazement in casual conversations, anime, and everyday interactions!
Expression 1: 信じられない… (Shinjirarenai…)
Meaning & Usage
This phrase is a classic go-to expression for conveying deep amazement, shock, or refusal to accept a reality. It literally translates to “cannot believe.” Depending on your tone of voice, it can express wonder, disappointment, or sheer outrage.
- 信じられる (Shinjireru) – Can believe (Potential form of 信じる, to believe)
- ない (Nai) – Negative marker (Cannot / Not)
English Translations:
- Unbelievable… / I can’t believe it…
- That’s unreal…
- I can’t accept this…
Examples
- こんな時間に終わるなんて、信じられない。→ Finishing at a time like this… I can’t believe it.
- えっ、彼が本当に勝ったの？！信じられない！→ What, he actually won?! Unbelievable!
- 信じられない… 何回やっても上手くいかない。→ I can’t believe it… No matter how many times I try, it doesn’t go well.
Detailed Breakdown & Spoken Variations
- Potential Form Construction:信じる (Shinjiru) $\rightarrow$ 信じられる (Shinjireru) $\rightarrow$ 信じられない (Shinjirarenai).
- Casual Contraction:In fast spoken Japanese, people often drop the 「ら」 (ra):
- 信じれない (Shinjirenai) – Very common in informal, fast speech among younger generations.
Expression 2: いったいどういうこと？！ (Ittai dou iu koto?!)
Meaning & Usage
When a situation turns totally bewildering or makes zero sense, this phrase expresses extreme confusion and demands an immediate explanation. It adds いったい (on earth / in the world) to emphasize total confusion.
- いったい (Ittai) – On earth / In the world (Emphatic interjection)
- どういう (Dou iu) – What kind of / What sort of
- こと (Koto) – Matter / Situation / Thing
English Translations:
- What on earth is the meaning of this?!
- What in the world is going on?!
- How does this make any sense?!
Examples
- ちょっと説明してよ！一体どういうこと？！→ Explain this to me! What on earth is going on?!
- え、部屋が散らかってる… 一体どういうこと？→ Huh, the room is trashed… What in the world happened here?
- 一体どういうことになってるの？誰も説明してくれない。→ What kind of situation have we landed in? Nobody is giving me an answer.
Understanding いったい (Ittai)
- Adding 一体 (いったい) before question words (どう, なぜ, 誰, 何) amplifies emotional intensity, similar to adding “on earth” or “in the world” in English:
- 一体何？！ (What on earth?!)
- 一体誰？！ (Who in the world?!)
Expression 3: 冗談でしょ？！ (Joudan desho?!)
Meaning & Usage
Used to react to unbelievable news, bad luck, or absurdity, this phrase questions whether the speaker is joking or if the situation itself is a cruel prank.
- 冗談 (じょうだん / Joudan) – Joke / Prank
- でしょ (Desho) – Right? / Isn’t it? (Casual contraction of でしょう)
English Translations:
- You’re joking, right?!
- Is this a joke?!
- Tell me you’re kidding!
Examples
- 電車が全線運転見合わせ？！冗談でしょ…→ All train lines suspended?! You’ve got to be joking…
- えっ、今日締め切りだったの？！冗談でしょ？！→ What, the deadline was today?! Are you kidding me?!
- 冗談でしょ？こんな高いの買えないよ！→ Is this a joke? I can’t buy something this expensive!
Nuance & Gender Variations
- 冗談でしょ？！ (Joudan desho?!): Gender-neutral, widely used in casual settings.
- 冗談だろ… (Joudan daro…): Masculine or lower-register tone, often muttered under one’s breath during sudden bad luck.
- 冗談じゃない！ (Joudan janai!): Stronger expression meaning “This is no laughing matter!” or “No way in hell!”
Expression 4: 思いもしなかった… (Omoi mo shinakatta…)
Meaning & Usage
Used when reflecting on an outcome that was completely beyond your scope of expectation. It emphasizes that the thought never even crossed your mind for a single second.
- 思い (Omoi) – Noun form of 思う (Thought / Thinking)
- も (Mo) – Even / At all
- しなかった (Shinakatta) – Did not do (Past negative of する)
English Translations:
- I never even thought of that…
- It never crossed my mind for a second…
- I wouldn’t have imagined it in my wildest dreams…
Examples
- こんな展開になるなんて、思いもしなかった。→ I never even thought that things would take a turn like this.
- まさか彼女が来るとは思いもしなかったよ。→ I never imagined in my wildest dreams that she would show up.
- 思いもしなかったトラブルが発生した。→ An unexpected trouble occurred that we hadn’t even conceived of.
Grammar Comparison: 思ってもみなかった vs. 思いもしなかった
- Both phrases mean “never even imagined,” but they use different structural nuances:
- 思ってもみなかった: Uses 〜てみる (to try doing). Lit: “Didn’t even try thinking about it.”
- 思いもしなかった: Uses Nouns + も + する. Lit: “Didn’t even do the action of thinking about it.” (Slightly more formal/literary tone).
Expression 5: ありえない！ (Arienai!)
Meaning & Usage
One of the most famous modern Japanese exclamations used when something feels logically impossible, absurdly unfair, or utterly ridiculous.
- あり得る (Arieru / Aru) – To be possible / Can exist
- ない (Nai) – Negative (Impossible / Cannot exist)
English Translations:
- No way! / Impossible!
- That’s ridiculous! / That makes no sense!
- Unbelievable!
Examples
- えっ、5分で売り切れたの？！ありえない！→ What, sold out in 5 minutes?! No way!
- こんなミスをするなんて、マジでありえない。→ Making a mistake like this is seriously ridiculous.
- ありえない… なんで私が怒られなきゃいけないの？→ Unbelievable… Why do I have to get yelled at?
Pronunciation Tip for Maximum Impact
When native speakers express intense disbelief with ありえない, they often lengthen or stress the syllables:
- あり得ない！ (A-ri-e-na-i!)
- マジでありえないって！ (Maji de arienai tte!) – “Seriously, no way!”
Comparative Matrix of Reaction Phrases
| Japanese Expression | Primary Emotion | Typical Situation | Formality Level |
| 1. 信じられない… | Deep Shock / Wonder | Unexpected results, shocking news | Neutral / Casual |
| 2. いったいどういうこと？！ | Baffled Confusion | Chaos, absurd situations needing answers | Casual |
| 3. 冗談でしょ？！ | Disbelief / Dismay | Bad timing, absurd price, sudden bad news | Casual |
| 4. 思いもしなかった… | Surprise / Reflection | Unexpected plot twists, surprising outcomes | Neutral / Semi-Casual |
| 5. ありえない！ | Outrage / Absurdity | Unfair events, impossible occurrences | Very Casual |
Practice Dialogue
Scenario: Sudden office system crash before a big presentation
A: ねぇ、プレゼンの資料、保存した？
(Hey, did you save the presentation files?)
B: うん、さっきパソコンに入れたよ。…あれ？画面が真っ黒になったんだけど。
(Yeah, I saved them on the PC just now. …Huh? The screen went completely black.)
A: え、冗談でしょ？！ あと10分で会議が始まるよ？！
(What, you’re kidding right?! The meeting starts in 10 minutes?!)
B: データが全部消えてる… 一体どういうこと？！
(All the data is gone… What on earth is going on?!)
A: ありえない！ 自動バックアップは取れてないの？！
(Impossible! Did the auto-backup not save it?!)
B: エラーが出て開けない… 本番直前にこんなことになるなんて思いもしなかった。
(An error popped up and won’t open… I never dreamed something like this would happen right before the real deal.)
A: 信じられない… とりあえずIT部門に電話しよう！
(Unbelievable… Let’s call the IT department right now!)
Common Pitfalls to Avoid
❌ Misusing ありえない in formal business settings
- ありえない sounds very colloquial and subjective. In formal business meetings, use:
- 「考えられません」 (Kangaeraremasen – It is unthinkable.)
- 「信じがたいことです」 (Shinjigatayi koto desu – It is hard to believe.)
❌ Using いったい in gentle, polite questions
- 一体 (Ittai) injects frustration or demand into a sentence. Avoid using it with polite customers or superiors unless you intend to sound demanding.
Cultural Notes
- The Power of Aida (間 – Pauses):In Japanese reactions, silence or a deep breath before exclaiming 「信じられない…」 adds dramatic weight. Native speakers often pair these expressions with a head shake or sigh.
- Pop Culture & Anime Prevalence:Phrases like 「ありえない！」 and 「冗談でしょ」 are ubiquitous in anime and manga to accentuate comedic drama or sudden stakes.
Wrap-up
In this episode, we mastered 5 additional natural Japanese reactions:
- 信じられない… – I can’t believe it…
- いったいどういうこと？！ – What on earth is going on?!
- 冗談でしょ？！ – You’ve got to be kidding!
- 思いもしなかった… – I never even thought of that…
- ありえない！ – Impossible! / No way!
Try integrating these into your casual Japanese conversations to convey authentic emotion!
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