とても・かなり・ずいぶん: Differences, Usage, and Nuances in Japanese

Three ways to say “very”: neutral intensity, a considerable degree, and subjective surprise

Category: Concepts & Distinctions

What are the differences between とても (totemo), かなり (kanari), and ずいぶん (zuibun)?

As a first approximation, they can be summarized as follows:

• とても: expresses “very” in a neutral and objective way, without any particular implications.
• かなり: indicates a high degree perceived as significant or above a certain threshold, with a nuance of personal evaluation (“quite”, “fairly”, “considerably”).
• ずいぶん: expresses a high degree perceived as remarkable relative to expectations, often with a strong subjective component (“remarkably”, “surprisingly”, “unusually”).

However, the difference between these adverbs is not merely a matter of intensity. It is not simply about “how much” something is, but rather how the speaker perceives that degree: whether they regard it as normal, above average, or surprising compared to what they expected.

For this reason, throughout this article we will analyze とても, かなり, and ずいぶん not as mere equivalents of “very”, but as linguistic tools that express different ways of evaluating reality, ranging from objectivity to perceived thresholds and deviations from expectations.

Japanese has a variety of degree adverbs, that is, words expressing what we translate into English as “very”, “quite”, “rather”, and so on. Some are ubiquitous, or at least frequently discussed in grammar books and textbooks for foreign learners.

Adverbs such as とても are explained extensively and become the standard reference point for expressing the idea of “very” in Japanese.

In reality, many others exist (for example なかなか, 大分, 非常に); we have already examined some of them, such as ほとんど and 大半, in a previous article. All of them have different nuances and belong to different registers.

In particular, adverbs such as ずいぶん and かなり, despite being extremely common in both spoken and written Japanese, are often treated only marginally or reduced to simple synonyms.

In this article, we will focus specifically on these latter two, because they tend to be somewhat neglected in textbooks.

We will therefore not provide a complete list of degree adverbs, but rather an in-depth analysis of the meaning, usage, and nuances of ずいぶん, かなり, and とても. In particular, とても will serve as a point of comparison: it is the neutral and standard adverb for saying “very”, and as such it will help highlight what makes ずいぶん and かなり different and more complex.

In the following sections, we will first examine each adverb individually, looking at its specific meaning, intensity, and tone. We will then compare them directly (the summary table will be particularly useful in this regard), before concluding with the usual final observations.

とても (totemo) - Very

Meaning and Usage

とても is probably the closest equivalent to “very” or “really” in standard Japanese.

It simply indicates a high degree of a quality or condition, without necessarily implying surprise (an important point to keep in mind when comparing it with ずいぶん).

For example: 「この本はとても面白いです。」 – “This book is very interesting.”

Here, とても simply intensifies the adjective interesting.

It is a neutral and widely used term. It can be used with adjectives and also (in negative sentences) with verbs, in the construction 「とても～ない」 meaning “not at all”. For example: 「とても信じられない」 – “I simply can’t believe it.”

Intensity

とても expresses a very high degree of intensity, comparable to “very” or “extremely.” It is often equated with 非常に (hijōni, “extremely”), which we will discuss in a future article, placing it among the strongest intensifiers in Japanese.

Indeed, sentences such as 「とても強い」 and 「非常に強い」 are almost equivalent and indicate a maximum or near-maximum degree.

Some native speakers even perceive とても as stronger than かなり (which we will discuss shortly), considering it a higher-level intensifier.

For example, in the following comparison:

「白鵬はとても強い。琴欧洲はかなり強いが、とても強いというほどではない。」

– “Hakuhō is very strong. Kotoōshū is quite strong, but not to the point of being called ‘very strong’.”

In this example, とても強い denotes the highest level (the unbeatable champion), whereas かなり強い suggests a high level, but not the very top.

This illustrates how とても can imply an extreme degree in certain comparative contexts.

Tone and Register

とても is a polite/standard term, suitable for neutral or formal contexts. It can be used both in the plain form and in the polite form (e.g. 「とても寒いです」 is perfectly natural).

Interestingly, Japanese speakers tend not to use とても too often with close friends or family members in highly informal situations.

This is not because とても is inherently formal, but because it sounds slightly polite or neutral; in extremely casual contexts, it is often replaced by more informal expressions such as 「すごく」 (sugoku) or 「めっちゃ」.

For example, a teenager talking with friends is more likely to say 「このゲームめっちゃ面白い！」 than 「とても面白い」.

Nevertheless, とても remains perfectly understandable and widely used; it simply gives the sentence a slightly more refined tone.

In spoken Japanese (with strangers, superiors, etc.), とても is entirely appropriate and sounds polite without being excessively stiff.

In formal writing, as already mentioned, it is often replaced by 非常に (which is more formal), although とても itself can also appear in writing that is not especially technical.

Typical Situations of Use

とても is used to state any fact with a high degree of intensity. It is ubiquitous: 「とても忙しい」 (very busy), 「とても静かだ」 (very quiet), 「とても残念です」 (that’s really unfortunate).

It does not require the situation to be extraordinary; it simply describes a high degree.

It carries no implicit comparative judgment and no sense of surprise.

For example, if the weather is hot in summer, one can say 「今日はとても暑い」 – “It’s very hot today” as a straightforward observation.

It is the most simple and direct equivalent of “very” (somewhat like very in English).

Examples

この本はとても面白くて、一晩で全部読んでしまった。

彼の説明はとても分かりやすかったので、すぐに理解できた。

今日はとても暑いから、外に出たくない。

その映画はとても感動的で、思わず涙が出た。

彼女はとても優しい人で、誰にでも親切に接する。

ずいぶん (zuibun)- Remarkably (more than I expected)

Meaning and usage

The term ずいぶん (usually written in kana, but also in kanji as 「随分」) is an adverb that means “very” or “remarkably”. Unlike a simple “very”, however, it carries a nuance of surprise on the part of the speaker: it is used when something has an unexpectedly high degree, more than one expected.

ずいぶん often expresses that a quantity or intensity exceeds the speaker’s expectations. For example, saying: 「ずいぶん大きくなったね！」 - “You’ve grown a lot (more than I expected)!”

In this situation, the use of ずいぶん implies surprise at how much someone, for example a child, has grown since the last time the speaker saw them.

This nuance of wonder is characteristic of ずいぶん.

In similar situations it could also be translated as “really a lot” or “quite a lot”. For example: 「日本のカメラってずいぶん高いんですね。」 - “Wow, Japanese cameras are really expensive!”

Here ずいぶん communicates surprise at a price perceived as unusually high. In fact, ずいぶん is often accompanied by interjections such as 「えー！」 (eeh!) or 「うわ！」 (wow!), precisely to underline the surprise.

Intensity

Besides the meaning of “very (more than expected)”, ずいぶん can also mean “a lot” in terms of quantity when it accompanies a verb.

In this case, the idea of surprise may become weaker, but the connotation of a remarkable quantity remains. For example: 「ずいぶん食べたね！」 - “You ate a lot!”, or 「ずいぶん待たされた。」 - “They made me wait a very long time.”

In these sentences, the large quantity is emphasized, whether the amount of food eaten or the time spent waiting, often with a tone of wonder or complaint about how much it was.

It should be noted that ずいぶん can also be used before a na-adjective as if it were an adjective itself, grammatically functioning like a na-adjective.

In these cases, it often takes on an ironic or disapproving nuance. For example: 「ずいぶん失礼な人だ。」 - “What a remarkably rude person!”, or 「ずいぶん勝手なことを言うね。」 - “That’s quite a selfish thing to say, isn’t it.”

Here ずいぶん strengthens a negative judgment, like “terribly”, often with a sarcastic or indignant tone.

This is a use to keep in mind because it differs from a simple “very”: 「ずいぶん失礼な！」 corresponds to “how extremely rude!” with surprise/indignation, stronger than the neutral 「とても失礼だ」.

Tone and register

ずいぶん is widely used in spoken language, especially to emphasize with surprise.

In everyday speech it often appears in exclamations, perhaps with a tone of wonder: 「ずいぶん暑くなってきたねえ！」 - “Wow, it’s gotten really hot (unexpectedly)!”

In informal or family conversations, it is completely common to use ずいぶん to emphasize surprising impressions.

In written language, the use of ずいぶん depends on the register. In informal or narrative contexts, for example in a novel, a personal blog, or dialogue in a story, ずいぶん appears exactly as it does in speech, sometimes written in kanji as 「随分」.

It serves to convey to the reader the surprise or subjective involvement of the narrator. For example, an author might write: 「随分昔のことだが…」 - “It happened a very long time ago, but…”, or 「彼は随分驚いた様子だった。」 - “He seemed very surprised.”

In these cases ずいぶん vividly emphasizes the magnitude, whether of the time that has passed or of the surprise, in a written register that is not excessively formal.

By contrast, in formal, academic, or journalistic texts, the use of ずいぶん is less frequent.

This is because ずいぶん has a colloquial and personal nuance; in formal writing, people tend to prefer more “neutral” or objective synonyms such as 「かなり」 or expressions like 「非常に」 (very, extremely).

For example, a news article would probably say 「その事故で負傷者がかなり出た。」 - “there were quite a few injured people in that accident” instead of using ずいぶん, or 「気温が非常に上昇した。」 - “the temperature rose very significantly”, for a more technical register.

ずいぶん would in fact reflect more of a subjective emotion, such as “I was struck by the number of injured people” or “what exceptional heat!”, whereas かなり/非常に are more impersonal choices and more suitable for formal writing.

In short, ずいぶん is perceived as an expression more typical of spoken language or colloquial writing, and in formal documents it is preferable to avoid it so as not to sound too informal or personal.

This does not mean that ずいぶん is Japanese “slang” or that it is impolite: on the contrary, it can also be used in polite spoken contexts (「ずいぶんお待たせしてしまいました」 - “I have kept you waiting really a long time”, said perhaps to a customer).

Simply, in higher written registers other terms are chosen.

Therefore, one can say that ずいぶん is appropriate in everyday speech, including polite speech, and in writing only when one wants to give a conversational tone or emphasize subjectivity.

An interesting register difference: ずいぶん is less frequent among young people in informal situations than slang-like synonyms such as 「めっちゃ」 or 「すごく」, which also mean “very”.

For example, among friends, a twenty-year-old today will more easily say 「めっちゃ暑い！」 than 「ずいぶん暑い！」. ずいぶん is not outdated, however: it is still used, but it gives a slightly more measured or adult tone than slang such as めっちゃ.

On the other hand, in formal spoken contexts, such as meetings or polite speeches, it is completely acceptable: between 「今日はずいぶん冷えますね」 and 「今日はとても冷えますね」 (both “it is really cold today, isn’t it”) the difference is minimal; ずいぶん adds a little surprise (“unusually cold”), while とても is a neutral “very cold”.

Examples

ずいぶん日本語が上手になったね。最初とは全然違うよ。

今日はずいぶん寒いね。昨日と比べて急に気温が下がった。

彼はずいぶん遅れて来たのに、まったく謝らなかった。

ずいぶん考えたけど、やっぱり答えは出なかった。

この町もずいぶん変わったね。昔の面影がほとんどない。

かなり (kanari) - Considerably, beyond the norm

Meaning and usage

かなり also means “very, quite, considerably”. It indicates a high degree, often translated as “rather” or “considerably”. The characteristic feature of かなり is that it suggests that the degree exceeds the norm or average expectations, without reaching the extreme.

The definition generally found in dictionaries is: “not extreme, but above average; more than one expected.”

For example: 「この問題はかなり難しいです」 - “This problem is quite difficult (more than one might think).” The implication is that it is more difficult than normal, although perhaps not impossible.

As mentioned, かなり is used when one wants to emphasize that something is considerably above the norm, while still remaining in a factual register. It also appears with quantities and measurements: 「かなりの数の人が反対した」 - “A considerable number of people opposed it.”, 「かなり長い間待ちました」 - “I waited for quite a long time.”

Also with adjectives: 「この服、高かったの？」「うん、かなり高かったよ」 - “Was this dress expensive? – Yes, it was pretty expensive.”

Here, the use of かなり indicates “yes, more than I might have wanted, quite expensive.” If it were ずいぶん高かった, instead, the implication would be “I was surprised by how expensive it was!”.

Intensity

かなり expresses high but not maximum intensity. We might say that it covers a range from “rather” to “very”. In terms of a “ranking”, some native speakers place かなり slightly below とても/非常に in strength.

For example, as seen above, かなり強い (quite strong) was used for a wrestler who is strong but not the strongest. However, かなり inherently carries the idea that something is notable relative to a standard.

In other words, while とても simply means “very”, かなり carries the meaning of greatly exceeding normal values or what one would expect. For example, on a typically hot summer day, a Japanese speaker would say 「今日はとても暑い」 - (“it is very hot today”), because it is normal for it to be hot in summer; they would not use かなり暑い unless the heat clearly exceeded normal summer heat.

If, on the other hand, it is so hot that it is exceptional (with people fainting from heatstroke!), then one could say 「今日はかなり暑いね」 - “it is really quite hot today (hotter than usual).” Thus, かなり is activated when one wants to indicate a degree outside the ordinary, without saying that it is the absolute maximum.

Tone and register

かなり is perceived as slightly more formal or objective than とても. It is extremely common both in speech (including ordinary conversation) and in writing. In particular, かなり is frequent in informative, discursive, and even journalistic contexts, because it expresses a notable degree in a fairly neutral way.

For example, in a news report one might say 「今年のインフルエンザはかなり深刻です」 - “This year’s flu is quite serious.” Here, かなり emphasizes severity beyond the norm. In conversation among friends, かなり can be used as well, although for “very” younger speakers tend to say すごく or other variants; かなり gives a slightly more measured or serious tone.

It is not at all archaic or overly formal: it is also heard in casual conversations, for example 「あの映画、かなり面白かったよ」 - “That movie was really/quite interesting.” In a light context, someone might also say 「結構面白かった」 (which is a little milder) or 「すごく面白かった」 (more emphatic and colloquial).

かなり therefore sits in a standard register: neither markedly colloquial like めっちゃ, nor stiff like 非常に. It can appear in polite speech, meetings, and so on, without any problem.

Examples

この問題はかなり難しいから、時間がかかると思う。

彼はかなり疲れているみたいで、話しかけても反応が薄い。

その店はかなり人気があって、いつも混んでいる。

日本語はかなり話せるようになったが、まだ自然とは言えない。

ここから駅まではかなり遠いので、タクシーで行ったほうがいい。

かなり and ずいぶん Compared

Both かなり and ずいぶん share the idea of “more than normal.” The main difference is that かなり is more objective and evaluative, whereas ずいぶん is more subjective and conveys surprise. We can say that かなり often communicates a matter-of-fact judgment (“considerably,” “significantly”), perhaps implying that an outside observer would agree with the assessment. ずいぶん, by contrast, emphasizes the speaker’s personal impression (“wow, that’s really a lot!”). Consider the following examples:

• 「東京はかなり物価が高い。」 – “The cost of living in Tokyo is quite high.” Here, かなり suggests a generally recognized fact (Tokyo is famously expensive, well above average, though not necessarily the most expensive place imaginable). It is an informative statement and sounds like a broadly shared observation.
• 「東京はずいぶん物価が高いね。」 – “Wow, the cost of living in Tokyo is really high!” In this case, ずいぶん implies that the speaker is impressed by the prices (perhaps they have just arrived in Tokyo and find them much higher than expected). The content is similar (the cost of living is high), but the tone conveys personal surprise.

It is also worth noting that かなり can function adjectivally with の/な (「かなりの額」 – “a considerable amount”), whereas ずいぶん is not used with の.

If turned into an adjective (ずいぶんな〜), it often takes on a negative (“terrible,” “awful”) or ironic nuance, as mentioned earlier, so it is not a straightforward substitute as a neutral intensifier for nouns. In general, かなり is more versatile in formal and descriptive contexts, while ずいぶん remains more colloquial and exclamatory.

ずいぶん and とても Compared

Both とても and ずいぶん mean “very”, but ずいぶん adds the nuance of “more than I expected.”

With 「この町はとても静かです」, the meaning is simply “This town is very quiet” in a neutral sense. By contrast, 「この町はずいぶん静かですね」 would be understood as “This town is really (unusually) quiet, isn’t it?”, perhaps implying that the speaker expected more noise (hence the element of surprise).

In general, とても is more neutral and descriptive, while ずいぶん is more subjective and conveys a sense of amazement. Furthermore, とても is not normally used directly with affirmative verbs. Saying 「とても食べた」 for “I ate a lot” sounds unnatural, whereas ずいぶん works perfectly: 「ずいぶん食べた」 – “I ate quite a lot.”

For actions or quantities, it is natural to use other adverbs (such as たくさん for “a lot”). In short, we use とても to mean simply “very”, while ずいぶん is appropriate when we want to convey “very… and I’m surprised by it.”

Comparing ずいぶん, とても, and かなり

Let us now look at some comparative examples to see how each of these three adverbs differs in terms of intensity, tone, and typical usage. All three generally mean “very”, but they differ in subtle semantic nuances and in the contexts where they are most naturally used. It is important to remember that these distinctions are not mathematical: they are often subtle and subjective, and native speakers choose among them depending on context and the kind of emphasis they wish to convey.

• とても難しかった – “It was very difficult” (a neutral statement expressing a high degree).
• かなり難しかった – “It was quite / rather difficult” (difficult beyond the norm, but not necessarily at the highest possible level; an objective evaluation).
• ずいぶん難しかった – “It was really very difficult” (surprisingly difficult, more difficult than expected; a subjective comment expressing surprise).

Another example from everyday conversation:

• 「昨日の試験はとても難しかったです。」 – “Yesterday’s exam was very difficult.” (Neutral, simply emphasizing a high level of difficulty.)
• 「昨日の試験はかなり難しかったです。」 – “Yesterday’s exam was quite difficult.” (Suggests it was more difficult than expected or more difficult than the average exam; an objective judgment.)
• 「昨日の試験はずいぶん難しかったです。」 – “Yesterday’s exam was really difficult.” (Suggests “I found it unexpectedly difficult”, with an element of surprise on the speaker’s part.)

In all three cases, Italian might simply translate them as “molto difficile”, but in Japanese the choice of adverb changes the register and nuance: とても is neutral, かなり adds the idea of “more than normal,” and ずいぶん adds surprise.

Summary of the Differences Between とても, かなり, and ずいぶん

In conclusion, とても, かなり, and ずいぶん are all degree adverbs that can be translated as “very”, but they differ in subtle ways:

• とても (very) – Very high intensity, and can even express extreme degrees (similar to 非常に).

  – Tone: neutral / standard polite, slightly more formal than slang expressions, but commonly used in everyday Japanese.

  – Usage: the default choice for expressing a high degree, without implying surprise. It tends to be avoided only in highly colloquial speech, where speakers often prefer すごく, めっちゃ, and similar expressions.

• かなり (quite, considerably) – High intensity: above the norm, but usually not the absolute maximum.

  – Tone: slightly more serious and objective, making it suitable for formal contexts and written language.

  – Usage: used to indicate a considerable degree in a factual way; common in news reports, explanations, and also in conversation when the speaker wants to emphasize something in a measured manner. It can imply that the fact would be considered noteworthy not only by the speaker but by others as well (a broadly shareable evaluation).

• ずいぶん (very, really quite a lot) – High intensity, comparable to かなり in terms of quantity, but used especially when the degree exceeds the speaker’s expectations.

  – Tone: colloquial and exclamatory, often carrying emotion (surprise, admiration, or sometimes indignation).

  – Usage: typical of spoken Japanese and informal writing, where the speaker wants to highlight their own sense of surprise: “really a lot (wow)”. It is often used when talking about changes over time (「ずいぶん良くなった」* – “It has improved tremendously (much more than before).”). It is uncommon in formal written language, where it may sound too subjective.

Summary Table

As we have seen, とても, かなり, and ずいぶん are all often translated as “very,” but in reality they express three different ways of perceiving intensity.

The difference is not only about the quantitative degree itself, but above all about the relationship between the observed fact and the speaker’s expectations: simple intensity, exceeding a norm, or subjective surprise. The table below summarizes their main differences.

Conclusion

とても, ずいぶん, and かなり all express a high degree, but とても is the basic and neutral “very”, かなり is the “very” that objectively highlights a level beyond the norm, and ずいぶん is the “very” colored by subjective surprise.

Being able to recognize these nuances helps you choose the most appropriate expression depending on the context. For example, in an essay or formal piece of writing, かなり is often the more natural choice; in a conversation where the speaker is expressing surprise, ずいぶん is more likely to appear; and in a standard statement, とても works perfectly well.

As is often the case in Japanese, the precise choice depends on the tone the speaker wishes to convey, and with these three adverbs, that tone can range from neutral, to informative, to genuinely surprised.

Understanding the subtle differences between these degree adverbs helps deepen one’s understanding of how Japanese expresses evaluation, expectation, and personal perception.