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Vocabulary
〜はずだ

B1 phrase 10 min read

〜はずだ

Practice it Examples Notes & Tips 〜はずだ in 30 Seconds

Explanation 〜はずだ in your Level:

At the A1 level, you can think of 〜はずだ as a way to say 'I think so' based on a simple reason. Even though it is a B1 grammar point, beginners often encounter it in simple sentences like 'He should be here.' At this stage, focus on the basic meaning: something is expected to happen because of a schedule or a simple fact. You might use it when waiting for a bus or a friend. The most important thing to remember is the connection: for verbs, just use the dictionary form. For nouns, you must add 'no'. For example, if today is Monday, you can say 'Kyou wa getsuyoubi no hazu da' (Today should be Monday). It is a useful tool for confirming basic information with others. Try to use it when you are fairly sure about something but want to leave a little room for being wrong. It's much better than just saying 'is' (desu) because it shows you are thinking logically about the situation. For example, 'Kore wa oishii hazu da' (This should be delicious) because it looks good or has good ingredients. It's a great step toward expressing more complex thoughts in Japanese.

At the A2 level, you start to use 〜はずだ to describe expectations based on more specific evidence. You will learn to use it with both I-adjectives and Na-adjectives. Remember the 'na' for Na-adjectives: 'Kono machi wa shizuka na hazu da' (This town should be quiet). You also begin to use the past tense 'ta hazu da' to talk about things you remember doing. For instance, 'Kagi wa kaban ni ireta hazu da' (I should have put the keys in the bag). This is very helpful when you are looking for things or trying to remember a previous conversation. You will also notice the negative form '〜はずがない' (hazu ga nai) in stories or anime, meaning 'That's impossible!' Using 〜はずだ helps your Japanese sound more natural because it adds a layer of reasoning to your speech. Instead of just stating facts, you are showing the 'why' behind your thoughts. Practice by looking at a calendar and saying what should happen on certain days, or looking at a menu and predicting what will taste good. It's all about logical connection.

At the B1 level, 〜はずだ is a core grammar point. You are expected to use it accurately with all parts of speech and understand its nuances compared to 'beki' (moral obligation) and 'darou' (guess). You should be able to use it in professional or slightly formal settings by changing 'da' to 'desu'. B1 learners use this phrase to explain project timelines, confirm instructions, and express surprise when expectations aren't met. For example, 'The document should have arrived yesterday' (Kinou todoita hazu desu). This level also introduces the contrast between 'hazu da' and 'wake da'. While 'hazu da' is an expectation, 'wake da' is a conclusion. You should also be comfortable with 'hazu ga nai' to express strong disbelief based on logic. For example, 'He is a vegetarian, so he wouldn't (hazu ga nai) eat this meat dish.' This shows you can process multiple pieces of information to reach a firm conclusion. Mastering 〜はずだ at this level allows you to participate in more complex discussions where reasoning is key.

At the B2 level, you use 〜はずだ to handle more complex logical structures and social nuances. You might use it to politely correct someone by pointing out a logical inconsistency: 'According to the manual, this button should (hazu da) start the machine, but it isn't working.' This uses the expectation to highlight a problem. You also become adept at using 'hazu' in the middle of sentences to modify other clauses. Furthermore, B2 learners understand the rhetorical use of 'hazu'. Sometimes, a speaker uses it even when they aren't 100% sure, just to sound more persuasive or to indicate that their reasoning is sound. You also begin to distinguish between 'hazu dewa nai' (it's not supposed to be like this) and 'hazu ga nai' (impossible). The former is often used to express a sense of 'this is not what I intended' or 'this doesn't fit the plan.' For example, when a project goes wrong, you might say 'Konna hazu dewa nakatta' (It wasn't supposed to be like this). This level of expression is essential for describing feelings of regret or unexpected outcomes in a sophisticated way.

At the C1 level, your use of 〜はずだ becomes very nuanced, incorporating it into high-level debates and literary analysis. You can use it to dissect an author's logic or a speaker's hidden assumptions. For instance, you might argue that a character's actions 'should have been' (hazu datta) different based on their established personality. You also use it in formal writing to present hypotheses. Instead of just saying 'we expect,' using 'hazu da' in a formal context (often as 'hazu de aru') adds a layer of objective logical deduction to your academic or professional papers. You are also sensitive to the irony that can be conveyed with 'hazu'. By saying something 'should' be a certain way when it clearly isn't, you can highlight absurdity or failure in a system. For example, in a critique of a failing policy: 'The economy should (hazu de aru) be recovering, yet we see the opposite.' This level of mastery allows you to use the grammar not just for communication, but for critical thinking and stylistic flair.

At the C2 level, 〜はずだ is used with complete native-like fluidity, often in ways that transcend simple rules. You might use it in complex philosophical discussions about determinism and causality—what 'must' happen in the universe. You understand the historical roots of 'hazu' (the notch of an arrow) and how that metaphor of 'fitting perfectly' still influences its modern usage. In high-level negotiation or diplomacy, you use 'hazu' to subtly steer expectations without being overly confrontational. You can also play with the grammar to create specific emotional effects in creative writing, such as using 'hazu' to show a character's crumbling sense of reality as their logical expectations fail them. At this level, you don't just use the phrase; you understand the cultural psychology behind it—the Japanese preference for basing expectations on shared objective facts rather than individual will. Your ability to use 'hazu' correctly in every possible register, from slangy disbelief to academic postulation, marks you as a true master of the language.

Practice it Examples Notes & Tips

〜はずだ in 30 Seconds

Expresses a logical expectation or deduction ('should be') based on objective facts, evidence, or schedules rather than just a subjective guess or personal feeling.
Connects to plain form verbs, nouns with 'no', I-adjectives directly, and Na-adjectives with 'na', acting grammatically like a noun in a sentence structure.
The negative form 'hazu ga nai' is used for strong logical disbelief ('impossible'), while 'hazu dewa nai' is for softer discrepancies in plans or expectations.
Essential for daily conversations, professional updates, and detective-style reasoning where you need to show the logical basis of your certainty to the listener.

The Japanese expression 〜はずだ (hazu da) is a cornerstone of logical deduction in the Japanese language. At its core, it expresses a strong expectation or a conclusion that the speaker has reached based on objective facts, evidence, or a natural course of events. When you use this phrase, you are saying that according to the information available, a certain outcome is the most logical or inevitable one. It is not merely a subjective guess or a wish; it is a statement of probability backed by reasoning. In English, we often translate this as 'it should be that,' 'it is expected that,' or 'I am sure that.' For example, if you know that Tanaka-san left his house an hour ago and the commute usually takes thirty minutes, you would say he should have arrived by now. This 'should' is exactly where 〜はずだ fits in. It is used in daily life to confirm schedules, predict weather based on forecasts, or express surprise when something doesn't happen as expected.

Logical Basis: The speaker relies on external data like schedules, rules, or common sense rather than internal intuition.

彼は今日、来るはずだ。(Kare wa kyou, kuru hazu da.) - He is expected to come today.

The nuance of 〜はずだ also extends to past events. When you say '〜たはずだ' (ta hazu da), you are recalling a memory or a fact that makes you believe something happened. If you are looking for your keys and remember putting them on the table, you would say 'Table no ue ni oita hazu da' (I am sure I put them on the table). This indicates that while you might be currently confused, your logical memory dictates where the object should be.

Objective Expectation: This differs from 'beki' (moral obligation) because it focuses on probability and fact, not duty.

鍵はカバンの中にあるはずだ。(Kagi wa kaban no naka ni aru hazu da.) - The keys should be in the bag.

In social interactions, using 〜はずだ can sometimes sound a bit assertive because you are stating a logical certainty. To soften the tone, speakers often add 'desu' to make it 'hazu desu' or add a particle like 'ne' to seek agreement. This makes the deduction feel more collaborative.

Negative Forms: 'Hazu ga nai' is a strong denial, meaning 'there is no way that...' while 'hazu dewa nai' is a softer 'it shouldn't be that...'

そんなことはないはずだ。(Sonna koto wa nai hazu da.) - That shouldn't be the case.

犯人はこの中にいるはずだ。(Hannin wa kono naka ni iru hazu da.) - The culprit should be among us.

もうすぐ雨が降るはずだ。(Mousugu ame ga furu hazu da.) - It should rain soon (based on the dark clouds).

Overall, 〜はずだ is the bridge between known information and expected outcomes, making it an essential tool for expressing reasoning and certainty in Japanese.

Using 〜はずだ correctly requires understanding how it attaches to different parts of speech. It functions similarly to a noun, so the rules for modifying nouns apply here. For verbs, you use the dictionary form for present/future expectations or the past (ta) form for past expectations. For example, 'taberu hazu' (should eat) versus 'tabeta hazu' (should have eaten). This distinction is vital for accurately conveying the timing of the logical deduction.

Verb Connection: Verbs connect directly in their plain form. Example: 'Iku hazu' (Should go).

彼はもうすぐ着くはずだ。(Kare wa mousugu tsuku hazu da.) - He should arrive soon.

Adjectives have slightly different rules depending on their type. I-adjectives connect directly in their plain form, such as 'oishii hazu' (should be delicious). Na-adjectives, however, require the 'na' particle to bridge the adjective and 'hazu'. For instance, 'kantan na hazu' (should be easy). This 'na' is often forgotten by learners, but it is grammatically mandatory.

Adjective Connection: I-adj: Plain form + hazu. Na-adj: Na + hazu. Example: 'Kirei na hazu' (Should be beautiful).

この試験は難しいはずだ。(Kono shiken wa muzukashii hazu da.) - This exam should be difficult.

Nouns also require a connecting particle, which is 'no'. So, 'kyou wa yasumi no hazu' (today should be a holiday). Without the 'no', the sentence becomes ungrammatical. This 'Noun + no + hazu' pattern is frequently used to identify roles or statuses based on evidence.

Noun Connection: Noun + no + hazu. Example: 'Sensei no hazu' (Should be a teacher).

今日は日曜日のはずだ。(Kyou wa nichiyoubi no hazu da.) - Today should be Sunday.

To express a negative expectation, you can either negate the preceding word ('konai hazu' - should not come) or negate 'hazu' itself ('kuru hazu wa nai' - there is no way he will come). The latter is much stronger and expresses total disbelief.

彼が忘れるはずがない。(Kare ga wasureru hazu ga nai.) - There is no way he would forget.

昨日は雨だったはずだ。(Kinou wa ame datta hazu da.) - It should have been raining yesterday (according to my memory or the forecast).

Mastery of these connections allows for precise expression of certainty across all aspects of Japanese life.

The phrase 〜はずだ is ubiquitous in Japanese society, appearing in both formal and informal contexts. In professional settings, it is used to discuss project timelines, delivery schedules, and data interpretations. For instance, a manager might say, 'The documents should arrive by noon,' using 'hazu desu' to indicate reliance on the courier's schedule. It conveys a sense of professionalism because the speaker is basing their statement on facts rather than vague hopes.

Business Context: Used for logistics, meeting times, and confirming receipt of information based on standard procedures.

メールはもう届いているはずです。(Meeru wa mou todoite iru hazu desu.) - The email should have arrived already.

In the world of entertainment, particularly in mystery and detective genres like 'Detective Conan' or 'Sherlock Holmes' adaptations, 〜はずだ is the hero's favorite tool. When the detective explains a crime, they use this phrase to link evidence to the culprit's actions. 'The window was locked from the inside, so the culprit should still be in this room.' Here, it creates suspense and showcases the character's intellectual prowess.

そんなはずはない！(Sonna hazu wa nai!) - That's impossible! (Literally: There is no such expectation!)

You will also hear it frequently in weather forecasts and news reports. Meteorologists use it to explain why certain weather patterns are expected. 'Cold air is moving in, so it should snow tonight.' In this context, it highlights the scientific basis of the prediction.

News & Media: Used for predictions based on scientific data or official announcements.

明日は晴れるはずだ。(Ashita wa hareru hazu da.) - It should be sunny tomorrow.

In casual conversation, friends use it to remind each other of plans. 'We were supposed to meet at 5, right?' (5-ji ni au hazu datta yo ne?). It serves as a gentle way to point out a discrepancy between what was planned and what is happening.

Daily Life: Used for confirming plans, locating misplaced items, and discussing shared knowledge.

冷蔵庫にビールがあるはずだ。(Reizouko ni biiru ga aru hazu da.) - There should be beer in the fridge.

彼は知っているはずだ。(Kare wa shitte iru hazu da.) - He should know (about it).

From the boardroom to the living room, 'hazu da' is the go-to phrase for articulating the logic of our daily expectations.

One of the most frequent mistakes learners make with 〜はずだ is confusing it with '〜べきだ' (beki da). While both can be translated as 'should' in English, they serve entirely different purposes. 'Beki da' refers to moral obligation or duty—what someone *ought* to do because it is the right thing. In contrast, 〜はずだ refers to logical expectation—what is *likely* to happen based on facts. For example, 'You should be kind' uses 'beki da', but 'The train should arrive' uses 〜はずだ.

Mistake: Confusion with 'Beki': Using 'hazu' for moral advice or 'beki' for logical predictions.

❌ 親切にするはずだ (Incorrect for 'You should be kind')
✅ 親切にするべきだ (Correct moral obligation)

Another common error involves the grammatical connections, specifically with nouns and na-adjectives. Beginners often say 'Noun hazu' or 'Na-adj hazu', omitting the 'no' or 'na'. This makes the sentence sound broken. Remember: 'Sensei **no** hazu' and 'Kirei **na** hazu'.

❌ 彼は学生はずだ (Incorrect)
✅ 彼は学生のはずだ (Correct)

Learners also struggle with using 〜はずだ for their own future intentions. Saying 'I should go to the store' (logical expectation) about yourself sounds like you are observing yourself from the outside, which is usually not what you mean. If you intend to go, use 'tsumori' or the volitional form. Use 〜はずだ for yourself only when you are puzzled, like 'I should have finished this' (but I haven't).

Mistake: Misapplied Self-Intent: Using 'hazu' to express 'I plan to...' or 'I will...'

❌ 明日行くはずだ (Incorrect for 'I plan to go')
✅ 明日行くつもりだ (Correct plan)

Lastly, understand the difference between 'hazu ga nai' and 'hazu dewa nai'. 'Hazu ga nai' is 'impossible/no way,' while 'hazu dewa nai' is a softer 'it's not supposed to be like this.' Using the strong version when you mean the soft one can make you sound unnecessarily aggressive or shocked.

❌ 彼は来ないはずがない (Double negative, means 'He must come' - very strong)
✅ 彼は来ないはずだ (He shouldn't come - simple expectation)

❌ 難しいのはずだ (Incorrect for I-adj)
✅ 難しいはずだ (Correct for I-adj)

Avoiding these pitfalls will ensure your use of 'hazu da' sounds natural and precise.

To truly master 〜はずだ, it is helpful to compare it with similar expressions like '〜わけだ' (wake da), '〜に違いない' (ni chigai nai), and '〜だろう' (darou). Each has a specific nuance regarding certainty and reasoning. '〜わけだ' is used when you have just realized the reason for something. For example, 'Oh, so that's why it's cold!' (Samui wake da). 〜はずだ is an expectation before the fact, whereas 'wake da' is a conclusion after seeing the result.

Comparison: Hazu da vs. Wake da: Hazu da: Expectation based on logic (He should be here). Wake da: Conclusion based on a discovered reason (So that's why he's here).

道理で暑いわけだ。(Douri de atsui wake da.) - No wonder it's hot.

'〜に違いない' (ni chigai nai) expresses a much stronger conviction, often translated as 'must be.' It is used when the speaker is almost 100% certain, often based on strong intuition or undeniable evidence. 〜はずだ is slightly softer, implying 'if everything goes according to plan/logic.'

Comparison: Hazu da vs. Ni Chigai Nai: Hazu da: Logical 'should.' Ni Chigai Nai: Convicted 'must.'

彼は犯人に違いない。(Kare wa hannin ni chigai nai.) - He must be the culprit (I am sure).

明日は雨だろう。(Ashita wa ame darou.) - It will probably rain (just a guess).

Another alternative is '〜ことになっている' (koto ni natte iru), which refers to scheduled events or rules. While 〜はずだ focuses on the speaker's expectation that the schedule will be met, 'koto ni natte iru' simply states the existence of the schedule.

Comparison: Hazu da vs. Koto ni Natte Iru: Hazu da: I expect it to happen. Koto ni Natte Iru: It is scheduled to happen.

明日、会議があることになっている。(Ashita, kaigi ga aru koto ni natte iru.) - There is a meeting scheduled for tomorrow.

そのはずです。(Sono hazu desu.) - That should be the case (Agreeing with a logical point).

Understanding these subtle shifts in meaning will allow you to choose the perfect word for every level of certainty.

How Formal Is It?

Fun Fact

Because the string *must* fit into the notch for the bow to work, the word evolved to mean something that 'must' or 'should' logically happen. It's a metaphor for things 'fitting' into place.

Pronunciation Guide

UK ha-zu da

US ha-zu da

Flat pitch (Heiban) in standard Japanese, though 'hazu' itself has a slight rise then fall in some dialects.

Rhymes With

Kazu (number) Mizu (water) Kizu (wound) Azu (as in Azuki) Yuzu (citrus) Bozu (monk) Chizu (map) uzu (whirlpool)

Common Errors

Pronouncing 'zu' as 'ju' (haju).
Elongating the 'u' in 'hazu' (hazuuu).
Putting too much stress on 'da'.
Failing to devoice the 'u' in 'desu' when saying 'hazu desu'.
Incorrect pitch accent making it sound like a different word.

Difficulty Rating

Reading 3/5

Easy to recognize in text as it is usually written in hiragana.

Writing 4/5

Requires remembering the specific connecting particles (no, na).

Speaking 4/5

Requires quick logical processing to use in real-time.

Listening 3/5

Very common in speech; easy to hear once you know the sound.

What to Learn Next

Prerequisites

だ / です (Copula) の (Particle) な (Particle) つもり (Intention) だろう (Guess)

Learn Next

〜わけだ (Conclusion) 〜に違いない (Strong conviction) 〜べきだ (Moral obligation) 〜ことになっている (Scheduled events) 〜ようだ (Appearance)

Advanced

〜はずもなき (Archaic/Literary impossibility) 〜まじき (Should not - formal) 〜べく (In order to/Should) 〜ものと思われる (It is expected that - formal) 〜ざるを得ない (Cannot help but)

Grammar to Know

Noun Modification

Hazu acts like a noun, so it follows the same rules (no/na).

Plain Form Usage

Always use the plain (dictionary) form before hazu, never the masu-form.

Past Tense Logic

Use ~ta hazu to express 'should have' based on memory.

Strong Negation

Use 'ga nai' instead of 'dewa nai' for maximum emphasis.

Softening with Particles

Add 'ne' or 'yo' to make the logical deduction sound friendlier.

Examples by Level

彼は来るはずだ。

He should come.

Verb (dictionary form) + hazu da.

今日は休みのはずだ。

Today should be a holiday.

Noun + no + hazu da.

バスはもうすぐ来るはずだ。

The bus should come soon.

Verb (dictionary form) + hazu da.

これはおいしいはずだ。

This should be delicious.

I-adjective + hazu da.

田中さんは家にいるはずだ。

Tanaka-san should be at home.

Verb (iru) + hazu da.

明日は晴れのはずだ。

Tomorrow should be sunny.

Noun + no + hazu da.

この本は簡単のはずだ。

This book should be easy.

Na-adjective (kantan) + na + hazu da.

５時になるはずだ。

It should become 5 o'clock.

Verb (naru) + hazu da.

田中さんはもう着いたはずだ。

Tanaka-san should have arrived already.

Verb (past form) + hazu da.

この料理は辛くないはずだ。

This dish shouldn't be spicy.

Negative I-adjective + hazu da.

彼は学生のはずだ。

He should be a student.

Noun + no + hazu da.

昨日は雨だったはずだ。

It should have been raining yesterday.

Noun + datta (past) + hazu da.

この道は静かなはずだ。

This street should be quiet.

Na-adjective + na + hazu da.

メールを送ったはずだ。

I should have sent the email.

Verb (past form) + hazu da.

そんなはずはない。

That shouldn't be the case / That's impossible.

Hazu + ga nai (strong negation).

会議は終わったはずだ。

The meeting should have finished.

Verb (past form) + hazu da.

薬を飲んだから、もう熱は下がるはずだ。

Since I took medicine, the fever should go down now.

Logic: Medicine taken -> Fever goes down.

彼は１０年も日本に住んでいるから、日本語が上手なはずだ。

Since he has lived in Japan for 10 years, his Japanese should be good.

Na-adjective (jouzu) + na + hazu da.

予定では、来週完成するはずだ。

According to the schedule, it should be completed next week.

Based on a schedule (yotei).

彼が嘘をつくはずがない。

There is no way he would tell a lie.

Strong logical denial (hazu ga nai).

窓が閉まっているから、泥棒が入れるはずがない。

Since the windows are closed, there's no way a thief could enter.

Logical impossibility based on a fact.

昨日、ここに置いたはずなのに、見当たらない。

I'm sure I put it here yesterday, but I can't find it.

Hazu + noni (expectation vs reality).

このボタンを押せば、動くはずです。

If you press this button, it should move.

Conditional (ba) + hazu desu.

彼は真面目だから、遅刻しないはずだ。

Since he is serious, he shouldn't be late.

Expectation based on character trait.

説明書通りに組み立てたのだから、完成したはずだ。

Since I assembled it according to the manual, it should be finished.

Logic based on following instructions.

彼があんなに怒るはずはなかったのだが。

He wasn't supposed to get that angry, though.

Hazu wa nakatta (Past negative expectation).

十分な準備をしたのだから、成功するはずだ。

Since we prepared sufficiently, we should succeed.

Logic: Preparation -> Success.

そんな重要なことを彼が忘れるはずがない。

There is no way he would forget such an important thing.

Emphatic logical impossibility.

おかしいな、ここにあるはずの鍵がない。

That's strange, the key that should be here isn't.

Hazu modifying a noun (hazu no kagi).

プロの彼がこんなミスをするはずがない。

There's no way a professional like him would make this kind of mistake.

Expectation based on professional status.

昨夜しっかり充電したから、電池は満タンのはずだ。

Since I charged it properly last night, the battery should be full.

Logic: Charged -> Full battery.

これだけの証拠があれば、彼が犯人であるはずだ。

If there is this much evidence, he must be the culprit.

Hazu used for strong deduction.

論理的に考えれば、この結論に達するはずだ。

If one thinks logically, one should reach this conclusion.

Formal logical deduction.

本来、この制度は国民を助けるはずのものだった。

Originally, this system was something that was supposed to help the citizens.

Hazu used to describe original intent vs reality.

彼の性格からして、黙って見過ごすはずがない。

Judging by his character, there is no way he would just stand by and watch silently.

Based on character analysis (kara shite).

科学的な見地から言えば、それは不可能なはずだ。

From a scientific standpoint, that should be impossible.

Expectation based on scientific theory.

これほどの名作が、世間に知られないはずがない。

There is no way such a masterpiece would remain unknown to the world.

Double negative for emphasis.

厳格な彼のことだから、約束を破るはずはない。

Knowing how strict he is, there's no way he would break a promise.

No koto dakara (because it's him).

当然、その結果は予測できたはずだ。

Naturally, that result should have been predictable.

Criticizing a lack of foresight.

万全の対策を期したのだから、漏洩は防げるはずだ。

Since we have taken every possible measure, leaks should be preventable.

Expectation based on exhaustive measures.

歴史の必然として、この変革は起こるべくして起こったはずだ。

As a historical necessity, this transformation should have occurred as it was meant to.

Philosophical expectation of causality.

森羅万象、すべての事象には理由があるはずだ。

In all of nature, there should be a reason for every phenomenon.

Universal logical assumption.

彼ほどの慧眼の持ち主なら、その危うさを見抜いていたはずだ。

Someone with his keen insight should have seen through that danger.

High-level character evaluation.

完璧な調和を保っている以上、崩壊するはずはないと信じられていた。

As long as perfect harmony was maintained, it was believed that it could not possibly collapse.

Past passive belief in impossibility.

その言動の裏には、何らかの意図が隠されているはずだ。

Behind those words and actions, some kind of intention should be hidden.

Deduction of hidden motives.

因果応報、自らの行いが報いとして返ってくるはずだ。

Cause and effect—one's own actions should return as retribution.

Expectation based on moral/karmic law.

真理を追究する者にとって、それは避けて通れぬ道であるはずだ。

For one who pursues the truth, that should be an unavoidable path.

Axiomatic expectation.

あれほど強固な絆が、一朝一夕に崩れるはずがない。

There is no way a bond that strong could crumble overnight.

Strong denial of sudden change.

Common Collocations

そんなはずはない

来るはずだ

知っているはずだ

あるはずだ

できるはずだ

届くはずだ

間違いのないはずだ

終わるはずだ

合格するはずだ

おいしいはずだ

Common Phrases

そのはずです

— That should be so. Used to agree with a logical deduction.

「会議は３時からですね？」「はい、そのはずです。」

〜たはずなのに

— I'm sure I did X, but... Used for expressing confusion when reality differs.

窓を閉めたはずなのに、開いている。

そんなはずはない

— That can't be right. Used to express shock or denial of a fact.

えっ、彼が犯人？そんなはずはない！

知っているはずなのに

— Even though they should know... Used to express frustration or confusion.

彼はルールを知っているはずなのに、守らない。

あるはずの〜がない

— The ~ that should be there is missing.

あるはずの財布がない。

〜はずの予定

— The plan that was supposed to happen.

行くはずの予定だったが、風邪を引いた。

〜はずがないだろう

— There's no way, right? A rhetorical question expressing strong doubt.

彼がそんなこと言うはずがないだろう？

〜はずのところを

— While it was supposed to be... Used in formal apologies for mistakes.

昨日お伺いするはずのところを、遅れて申し訳ありません。

〜はずだと言い切る

— To state firmly that something should be so.

彼は絶対に成功するはずだと言い切った。

〜はずだと思い込む

— To be under the firm (sometimes mistaken) impression that...

彼は休みのはずだと思い込んでいた。

Often Confused With

〜はずだ vs べきだ

Beki is moral 'should'; Hazu is logical 'should'.

〜はずだ vs だろう

Darou is a guess; Hazu is based on evidence.

〜はずだ vs わけだ

Wake is a realized reason; Hazu is an expectation.

Idioms & Expressions

"出る杭は打たれるはずだ"

— The nail that sticks out is expected to be hammered down. A variation of the proverb.

日本社会では、出る杭は打たれるはずだ。

Proverbial

"そんなはずは万に一つもない"

— There is not a one-in-ten-thousand chance of that being the case. Very strong denial.

彼が裏切るなんて、そんなはずは万に一つもない。

Emphatic

"道理で〜はずだ"

— No wonder X should be the case. Used when a reason explains an expectation.

道理で彼は詳しいはずだ。専門家なのだから。

Neutral

"〜はずの皮算用"

— Counting chickens before they hatch (based on expectations).

儲かるはずの皮算用が外れた。

Idiomatic

"嘘のようなはずの話"

— A story that seems like a lie but should be true.

それは嘘のようなはずの話だ。

Literary

"あるべきはずの姿"

— The way things are supposed to be (combining beki and hazu).

これがあるべきはずの姿だ。

Formal

"〜はずの運命"

— A destiny that was expected to happen.

二人は出会うはずの運命だった。

Romantic/Literary

"〜はずのない結末"

— An ending that shouldn't have been possible.

それは誰もが予想だにしない、はずのない結末だった。

Literary

"〜はずだという確信"

— The conviction that something should be so.

彼は勝てるはずだという確信を持っていた。

Formal

"身に覚えがあるはずだ"

— You should have a memory of this/You should know what I'm talking about.

君にも身に覚えがあるはずだ。

Accusatory/Neutral

Easily Confused

〜はずだ vs つもり

Both relate to future expectations.

Tsumori is your own intention ('I plan to'). Hazu is logical expectation ('It should happen').

行くつもりだ (I plan to go) vs 行くはずだ (He/it should go).

〜はずだ vs かもしれない

Both express probability.

Kamoshirenai is 50/50 or less ('might'). Hazu is 90% ('should').

雨が降るかもしれない (It might rain) vs 雨が降るはずだ (It should rain).

〜はずだ vs に違いない

Both express strong certainty.

Ni chigai nai is subjective conviction ('must be'). Hazu is objective logic ('should be').

彼は犯人に違いない (I'm sure he's the one) vs 彼は来るはずだ (He's expected to come).

〜はずだ vs そうだ

Both can mean 'it seems'.

Souda (appearance) is based on what you see. Hazu is based on what you know.

おいしそうだ (It looks delicious) vs おいしいはずだ (It should be delicious because of the ingredients).

〜はずだ vs はずれる

It sounds similar.

Hazure is the verb 'to miss' or 'to be off'. It is the opposite of the expectation fitting.

予想がはずれた (The prediction was wrong).

Sentence Patterns

V(辞書形) + はずだ

彼は来るはずだ。

N + の + はずだ

今日は休みのはずだ。

Na-adj + な + はずだ

彼は元気なはずだ。

V-ta + はずだ

買ったはずだ。

〜はずがない

そんなこと、あるはずがない。

〜はずだったのに

晴れるはずだったのに、雨が降った。

〜はずのもの

それは成功するはずのものだった。

〜はずではなかった

こんなことになるはずではなかった。

Word Family

Nouns

はず (hazu) - The core noun meaning expectation or the notch of an arrow.

はずれる (hazureru) - To be disconnected, to miss the mark.

はずす (hazusu) - To remove, to unfasten.

はずみ (hazumi) - Momentum, impulse.

はずかしい (hazukashii) - Embarrassed (etymologically related to 'hazure')

はずかしめる (hazukashimeru) - To humiliate.

How to Use It

frequency

Extremely high in daily conversation and media.

Common Mistakes

Using 'hazu' for moral advice. → Use 'beki'.
'Hazu' is for logical probability, not moral duty.
Omitting 'no' with nouns. → Noun + no + hazu.
'Hazu' is a noun and needs a particle to connect to other nouns.
Using 'hazu' for personal future plans. → Use 'tsumori'.
'Hazu' sounds like a logical deduction about someone else or a schedule, not your own will.
Using 'hazu' for simple guesses with no evidence. → Use 'darou'.
'Hazu' requires a logical basis or objective facts.
Confusing 'hazu ga nai' with 'hazu dewa nai'. → Use 'ga nai' for 'impossible'; 'dewa nai' for 'not supposed to be'.
The intensity and meaning differ significantly.

Tips

Don't forget the 'NA'!

For na-adjectives, always use 'na' before 'hazu'. Example: 'Kantan na hazu da'. Omitting it is a dead giveaway of a beginner.

Logic vs. Feeling

Use 'hazu' when you have a reason. If you just 'feel' like it's going to rain, use 'kamoshirenai' or 'darou'.

Soften the Blow

State logical expectations as 'hazu desu ne' to sound more collaborative and less like you are lecturing the listener.

Anime Cues

When a character says 'Hazu da...' while looking at a map, they are confirming their location based on logic.

Correcting Others

Use 'hazu' to politely point out a mistake. 'According to the map, it should (hazu) be left, not right.'

The Arrow Notch

Keep the image of the arrow notch in your mind. It helps you remember that 'hazu' is about things fitting into place.

Memory Logic

Use 'V-ta hazu' in your diary to describe things you are pretty sure you did, but might be questioning now.

Punctuality

In Japan, trains are so punctual that 'hazu' is used with almost 100% certainty for schedules.

Avoid Self-Intent

Don't say 'Ashita iku hazu da' for 'I will go tomorrow'. It sounds like you're predicting your own future as if you were a stranger.

Double Negatives

Master 'hazu ga nai' to express strong logical impossibility. It's a very powerful and natural-sounding expression.

Memorize It

Mnemonic

Think of 'Hazu' as 'Has to'. It 'has to' be true because of logic! Hazu -> Has to.

Visual Association

Imagine an arrow's notch fitting perfectly onto a bowstring. If the notch (hazu) is there, the string *should* be there.

Word Web

Logic Expectation Evidence Certainty Schedule Reasoning Notch Arrow

Challenge

Try to find three things today that 'should' happen based on a schedule and say them out loud using 'hazu desu'.

Word Origin

The word 'hazu' originally referred to the notches at either end of a Japanese bow (yumi) where the bowstring (tsuru) is attached. It also refers to the nock of an arrow.

Original meaning: A thing that fits perfectly into a specific place, like a string into a notch.

Japonic (Old Japanese)

Cultural Context

Be careful not to use 'hazu' when someone is grieving or in a sensitive situation where logic might sound cold. For example, 'They should have lived longer' is better said with 'beki' or other emotional expressions.

In English, we use 'should' for both logic ('The bus should be here') and morals ('You should be nice'). In Japanese, these are split into 'hazu' and 'beki'.

Detective Conan often says 'Sonna hazu wa nai' when a trick is revealed. The song 'Hazu' by various J-pop artists often explores missed expectations in love. In the movie 'Your Name', characters use 'hazu' to question their fading memories.

Practice in Real Life

Real-World Contexts

Confirming a Schedule

会議は３時のはずだ。
電車はもう来るはずだ。
明日は休みのはずだ。
５時に終わるはずだ。

Searching for Lost Items

ここに置いたはずだ。
カバンにあるはずだ。
誰かが持っているはずだ。
家にあるはずだ。

Expressing Disbelief

そんなはずはない。
彼がやるはずがない。
間違っているはずがない。
嘘のはずがない。

Giving Encouragement

君ならできるはずだ。
練習したから大丈夫なはずだ。
成功するはずだよ。
道は開けるはずだ。

Predicting Weather

明日は晴れるはずだ。
雨は止むはずだ。
寒くなるはずだ。
雪が降るはずだ。

Conversation Starters

"「今日は田中さんが来るはずですが、まだですね。」 (Tanaka-san should be coming today, but he's not here yet.)"

"「このレストラン、おいしいはずだよ。友達が言ってたから。」 (This restaurant should be delicious. My friend said so.)"

"「明日のテストは簡単のはずだよね？」 (Tomorrow's test should be easy, right?)"

"「鍵はここにあるはずなんだけど、見つからないんだ。」 (The key should be here, but I can't find it.)"

"「彼はもう日本語がペラペラなはずだよ。」 (He should be fluent in Japanese by now.)"

Journal Prompts

今日、予定通りに進むはずだったことは何ですか？ (What was something that was supposed to go according to plan today?)

あなたが「絶対に成功するはずだ」と信じていることは何ですか？ (What is something you believe 'should definitely succeed'?)

「そんなはずはない」と驚いた経験について書いてください。 (Write about an experience where you were shocked and thought 'That can't be right.')

１０年後の自分はどうなっているはずだと思いますか？ (What do you think you should be like in 10 years?)

子供の頃、大人になったらできるはずだと思っていたことは何ですか？ (What is something you thought you'd be able to do as an adult when you were a child?)

Frequently Asked Questions

10 questions

Yes, but usually only in the past tense ('I should have...') or when you are expressing confusion about why you did or didn't do something. Using it for your own future plans ('I should go') sounds weird; use 'tsumori' instead.

It's just the level of politeness. 'Hazu da' is plain form (used with friends or in writing), and 'hazu desu' is polite form (used with bosses or strangers).

Mostly, yes, in the sense of logical expectation. However, in the negative 'hazu ga nai', it often translates to 'impossible' or 'no way'.

Yes, but it often takes the form 'hazu de aru' or is replaced by more formal expressions like 'to suitei sareru' (it is presumed that).

Because 'hazu' is grammatically a noun. Just like 'Tanaka-san no hon' (Tanaka's book), you need 'no' to connect another noun to it.

No. For moral duties like 'you should help the elderly', you must use 'beki da'. 'Hazu' is only for logical probability.

It means 'It wasn't supposed to be like this.' It's a very common phrase used when things go wrong despite your plans.

Yes! 'Hazure' means 'a miss' (like in a lottery). It's when the outcome 'falls out' of the 'hazu' (notch/expectation).

Yes, especially if you are referring to a forecast. 'The forecast said it would be sunny, so it should be sunny (hareru hazu da).'

It's very certain, usually around 80-90%. You are stating that based on everything you know, this is the only logical outcome.