Only だけ and しか in Japanese

In Brief

Both だけ and しか can mean “only.” Use だけ with an ordinary positive or negative predicate for a neutral limit: 水だけ飲みます, “I drink only water.” Use しか with a grammatically negative predicate: 水しか飲みません, literally “I do not drink anything except water.”

Overview

English uses “only” in several ways: only one person, only today, only eat, or only able to speak Japanese. Japanese commonly expresses these limits with だけ or しか. They often describe the same facts, but they build the sentence differently and can guide the listener toward a different impression.

This is an A1 grammar point because the beginner rule is compact: だけ is the straightforward “just/only,” while しか must be followed by a negative predicate. A predicate is the part that says what happens or what something is—usually the verb or adjective at the end of a Japanese sentence. You therefore say 千円しかありません, not 千円しかあります.

The word before だけ or しか is the item being singled out. That item may be a noun, an amount, a time expression, or—as you learn more grammar—a whole verb phrase. Unlike English, Japanese places the limiting marker directly after that item, which often makes the intended scope clearer.

How It Works

The beginner patterns

Meaning	Pattern	Example	Translation
neutral “only”	noun/amount + だけ + positive predicate	一人だけ来ました。	Only one person came.
“only; nothing but”	noun/amount + しか + negative predicate	一人しか来ませんでした。	Only one person came.
“not only” or a negative fact about the limited item	noun/amount + だけ + negative predicate	一人だけ来ませんでした。	Only one person did not come.

The third line is important: だけ does not require a positive ending. It can occur in a negative sentence when that is what the meaning calls for. By contrast, しか requires the sentence ending itself to be negative.

だけ: a neutral boundary

Put だけ immediately after what you want to limit:

• 水だけ — only water
• 今日だけ — only today
• 三人だけ — only three people
• 日本語だけ — only Japanese

With だけ, the rest of the sentence keeps its normal form:

• 水だけください。 — Just water, please.
• 水だけ飲みます。 — I drink only water.
• 水だけ飲みません。 — Water is the only thing I do not drink. / I do not drink just water, depending on context.

That last sentence shows why context and emphasis matter. The basic grammar is valid, but a longer sentence is often clearer when a negative meaning could be read in more than one way.

だけ generally presents a limit as a fact. It does not automatically suggest that the amount is disappointing or inadequate. 一人だけ来ました simply reports that one person came, though tone and context can still add emotion.

しか: “nothing except” with a negative ending

Put しか after the limited item, then make the predicate negative:

• 千円しかありません。 — I have only 1,000 yen.
• 日本語しか話せません。 — I can speak only Japanese.
• 日曜日しか休めません。 — I can take time off only on Sundays.

A useful mental paraphrase is “not anything except X”:

• 水しか飲みません。
• “I do not drink anything except water.”
• Natural English: “I drink only water.”

The Japanese ending is negative even though the natural English translation is usually positive. Do not copy the English surface form. Build しか and a negative ending as a pair.

The negative can take different forms according to tense and politeness:

Time/register	Negative ending	Example
non-past, polite	～ません / ありません	千円しかありません。
past, polite	～ませんでした / ありませんでした	一人しか来ませんでした。
non-past, plain	～ない	これしかない。
past, plain	～なかった	パンしか食べなかった。

The difference in nuance

Compare these two statements:

Japanese	Basic meaning	Typical presentation
千円だけあります。	I have only 1,000 yen.	Neutrally identifies 1,000 yen as the amount.
千円しかありません。	I have only 1,000 yen.	Frames 1,000 yen as the full extent; often sounds limited or insufficient.

The difference is a tendency, not an iron rule. Context can make だけ sound disappointed and しか purely factual. Still, しか often draws attention to how restricted the choice, quantity, or ability is. This is why it is natural in sentences such as “I only have five minutes” or “Only this shop is open.”

What happens to other particles?

Particles are short markers such as を, が, に, and で that show a word’s role in the sentence.

The object marker を and subject marker が are commonly replaced by だけ or しか:

• 水を飲みます → 水だけ飲みます / 水しか飲みません
• 一人が来ました → 一人だけ来ました / 一人しか来ませんでした

Particles that carry meanings such as destination, location, means, starting point, or endpoint often remain before だけ or しか:

Base phrase	With a limit	Meaning
東京に	東京にだけ / 東京にしか	only to/in Tokyo
電車で	電車でだけ / 電車でしか	only by train
月曜日から	月曜日からだけ / 月曜日からしか	only from Monday
五時まで	五時までだけ / 五時までしか	only until five

Not every possible combination is equally natural in every context. At beginner level, learn common phrases as whole units: ここでしか, 今日だけ, 日本にだけ, and 三人しか.

Limiting actions

だけ and しか can also limit an action rather than a noun. The verb before them uses the plain form—the basic form such as 見る or 待つ, not the polite ～ます form.

• 見るだけです。 — I am only looking. / That is all I will do.
• 待つしかありません。 — There is nothing to do but wait.

The second pattern, verb + しかない／しかありません, means that there is no alternative except that action. This is useful but goes beyond the simplest A1 noun pattern.

Examples in Context

Japanese	English	Note
水だけください。	Just water, please.	A neutral request limiting the order to water.
朝はコーヒーだけ飲みます。	In the morning, I drink only coffee.	だけ replaces を.
一人だけ来ました。	Only one person came.	Neutral report about the number.
この店は今日だけ安いです。	This shop is cheap only today.	Limits the time.
私だけ知っています。	Only I know.	Limits the person who knows.
千円しかありません。	I only have 1,000 yen.	しか pairs with ありません.
一人しか来ませんでした。	Only one person came.	Past polite negative after しか.
日本語しか話せません。	I can only speak Japanese.	Negative potential form: 話せません.
冷蔵庫には卵しかない。	There are only eggs in the refrigerator.	Plain negative ない; は adds topic or contrast.
あと五分しかありません。	There are only five minutes left.	Often suggests that time is short.
このカードは日本でしか使えません。	This card can only be used in Japan.	で remains before しか.
日曜日にしか会えません。	I can only meet you on Sunday.	に remains before しか.
ちょっと見るだけです。	I am just looking.	Plain verb + だけです.
名前を書くだけでいいです。	You only need to write your name.	だけでいい means “doing just that is enough.”
バスがないので、歩くしかありません。	There is no bus, so we have no choice but to walk.	Plain verb + しかありません expresses the only option.

Common Mistakes

Using a positive predicate after しか

• Wrong: 千円しかあります。
• Right: 千円しかありません。
• Why: しか must be completed by a negative predicate. In natural English the translation is “I only have 1,000 yen,” but Japanese builds it as “I do not have anything except 1,000 yen.”

Making だけ negative because it means “only”

• Wrong: 水だけ飲みません。 (if you mean “I drink only water”)
• Right: 水だけ飲みます。
• Why: だけ does not trigger negation. The wrong version changes the meaning and may suggest that water is the one thing you do not drink.

Keeping を or が unnecessarily

• Unnatural for the basic meaning: 水をしか飲みません。
• Right: 水しか飲みません。
• Why: しか normally replaces を and が. Other particles such as に and で can remain: 日本でしか買えません.

Attaching the marker to the wrong item

• Not the intended meaning: 私は今日、日本語だけ勉強します。 — Today I will study only Japanese.
• Right for “I study Japanese only today”: 私は今日だけ日本語を勉強します。
• Why: Put だけ directly after the word or phrase whose range you want to restrict. English can move “only” around loosely in conversation; Japanese placement is a useful guide to scope.

Assuming しか always means disappointment

• Overinterpretation: 一人しか来ませんでした。 must mean the speaker is upset.
• Better understanding: It says that no more than one person came and highlights the small limit.
• Why: しか often suggests insufficiency, but the speaker’s actual attitude comes from context, situation, and intonation.

Usage Notes

Both forms are common in speech and writing. Their politeness comes mainly from the sentence ending, not from だけ or しか themselves: これしかない is plain, while これしかありません is polite.

In requests, だけ often corresponds to “just”: 水だけください (“Just water, please”) or 見るだけです (“I’m just looking”). It can reassure the listener that the request or action is limited. しか is less suitable when you merely want to place a straightforward order because it foregrounds the lack of alternatives: 水しかありません means “There is only water,” not “Just water, please.”

Quantities deserve special attention. With しか, a quantity is usually heard as a low or restricted amount: 五分しかない, “There are only five minutes.” With だけ, the speaker may simply define the amount: 五分だけ待ってください, “Please wait just five minutes.” The latter can even make the request sound manageable.

Beyond the Basics / Advanced Use

You do not need to master these patterns at A1, but they show how the same two markers develop into very common constructions.

だけで: “with only” or “just by”

Adding で can show that one item or action is sufficient to produce a result:

• このカードだけで入れます。 — You can enter with just this card.
• 写真を見るだけで分かります。 — I can tell just by looking at the photo.
• 名前を書くだけでいいです。 — All you need to do is write your name.

Here で may mark the means or condition. The frequent pattern ～だけでいい means “only X is needed” or “just doing X is enough.”

だけでは／だけじゃ: “with only X, not enough”

When は adds contrast, だけでは often introduces a limit that is insufficient:

• お金だけでは幸せになれません。 — Money alone cannot make you happy.
• 読むだけじゃ上手になりません。 — You will not improve by only reading.

だけじゃ is the conversational contraction of だけでは.

だけでなく: “not only … but also …”

Aだけでなく、Bも expands rather than narrows the range:

• 日本語だけでなく、中国語も勉強しています。 — I study not only Japanese but also Chinese.

The も on B means “also.” This construction is more formal than casual だけじゃなく, but both are widespread.

Verb + しかない: no other choice

After a plain-form verb, しかない means “there is no choice but to”:

• もう一度やるしかない。 — We have no choice but to do it again.
• 終電がないから、タクシーで帰るしかありません。 — The last train is gone, so there is no choice but to go home by taxi.

This pattern often conveys resignation or a practical conclusion. The negative word ない belongs to the construction; do not change it to ある.

だけに and だけあって

At more advanced levels, だけ appears in patterns where a simple translation as “only” no longer works. ～だけに can mean “precisely because,” and ～だけあって can mean “as you would expect, given that.” For example, 人気があるだけあって、いつも混んでいます means “As you would expect from its popularity, it is always crowded.” Learn these as separate grammar patterns rather than forcing the A1 meaning onto them.

Practice Tips

1. Build pairs. Take five facts and say each one twice: パンだけ食べます and パンしか食べません. Check that だけ has the ending you intend and しか has a negative ending.
2. Mark the limited phrase. Before translating, underline the exact English idea being limited—“only today,” “only Japanese,” or “only three people.” Put だけ or しか immediately after its Japanese equivalent.
3. Listen for the ending. When you hear しか, predict a negative form such as ない, ません, できない, or ありません. This trains you to process the whole Japanese pattern instead of translating word by word.

Related Concepts

• Prerequisite: Basic Particles は/が/を/に — helps you see which role markers are replaced by だけ or しか and which remain before them.