The しか Particle: Only (with Negative)
The しか particle is a restrictive marker. It singles out one member of a contextually defined set and forces the predicate into the negative, so the sentence itself says "nothing else qualifies."12 For the N5 learner, しか is the negative-polarity partner to neutral だけ, and the main source of confusion in "only" sentences.34
Overview
What しか is, in one line
The しか particle marks the only member of the relevant set that the predicate applies to. The predicate must be negative.12 精選版 日本国語大辞典's gloss says the same thing: しか singles out a thing and expresses total denial of everything else.2
The English gloss is "only" or "nothing but," but the underlying Japanese frame is "X しか + negative predicate," not "only X + affirmative predicate."56
水しか飲まない。3
"I drink nothing but water."
The same particle attaches to nouns, to number-plus-counter quantities, and to verbs in the verb-plain + しか + ない frame. It stacks after the oblique case particles に, で, から, へ, と, and replaces は, が, を.34
Classification and register
しか is a focus particle (副助詞 / 係助詞, depending on the school). 精選版 日本国語大辞典 lists it as a 副助詞,1 while デジタル大辞泉 and Japanese Wikipedia's 係助詞 entry treat it as a 係助詞. The reason is that modern しか corresponds (係り) with negative predicate forms, making it the modern descendant of classical 係り結び.27 English-language references typically use "focus particle" or "restrictive / exclusive particle."564
しか is always written in hiragana, never in kanji or katakana. It is neutral across polite and plain speech; the polarity sits on the predicate, not on しか itself.6
Pragmatically, しか carries a "not enough / and that's all" speaker feeling. This is the headline contrast with neutral だけ.34
JLPT level and where it appears
The noun + しか + negative-predicate pattern is N5 core in the J-Compass roadmap. It is taught alongside だけ in the Genki I / Minna no Nihongo lesson-11 timeframe. Bunpro tags its dedicated noun-pattern card at N4 rather than N5,8 and tags the fuller verb-pattern sentence-final construction at N3.9 In practice, the two framings are not contradictory: every reference treats しか as beginner-tier material introduced together with だけ.
The three roadmap-named collocations 〜しかいない, 〜しかない, and 〜しかできない are the high-frequency production targets. Across teaching sources, the recurring confusion points are the affirmative-vs-negative polarity rule, the case-particle stacking asymmetry with だけ, and the "not enough" speaker feeling.34
Form and attachment
Surface form
しか is two hiragana, pronounced "shi-ka," with two morae, no lengthening, and no voicing alternation. The particle does not undergo rendaku: しか never becomes じか, even after a voiced syllable.10 A voiced variant しが surfaced in Early Modern Japanese, but it has fallen out of use; the modern voiceless form is original.1
The particle is purely grammatical and has no kanji form in modern Japanese.110 On the surface, it can be confused with the unrelated conjunction しかし ("however") and the noun 鹿 (deer). In context, its position immediately after the limited element, followed by a negative predicate, identifies it as the particle.
Attachment rules at a glance
しか attaches directly to a noun:
水しか飲まない。3
"I drink nothing but water."
It attaches to a number-plus-counter or quantity expression:
一円玉しかない。5
"I have just a one-yen coin."
It attaches to the plain / dictionary form of a verb in the frame verb + しか + ない:
行くしかない。9
"I have no choice but to go."
It also stacks after an oblique case particle (に, で, から, へ, と, まで):
人が多いから、並ぶしかない。9
"Because there are many people, we have no choice but to line up."
しか cannot stack with the grammatical-relation particles は, が, を; those are replaced rather than combined.4
The mandatory-negative rule
The matrix predicate must end in a negative form. Wiktionary classifies しか formally as a negative polarity item, requiring negation in its sentence structure for grammatical correctness.10 Wikipedia (en) states the rule directly: しか must be followed by a negative verb.5
The negative target includes ない on verbs (飲まない), なかった for past tense, ない as the existence verb for inanimate things, いない for animate beings, and じゃない / ではない on copula predicates. In polite speech, the negative appears as ません, ありません, いません, or ませんでした.8
座るところがここしかありません。8
"There is nowhere else to sit but here."
冷蔵庫に牛乳しか残ってない。8
"There is nothing but milk remaining in the fridge."
The case-particle stacking rule
しか replaces は, が, and を on topics, subjects, and direct objects: ×私はしか, ×田中さんがしか, ×水をしか are ungrammatical or extremely marked.4 It stacks after the oblique case particles に, で, から, へ, と, まで, never before them. This order is fixed.
The reverse order (×しかに, ×しかで, ×しかから) is ungrammatical.34 This is the key contrast with だけ, which permits both orders (にだけ / だけに) with a meaning shift.3
この車は二人しか乗れない。3
"Only two people fit in this car."
彼女は彼しか愛していない。4
"She loves no one but him."
The four core uses of しか
1. Restrictive "only, nothing but" on nouns
しか on a bare noun marks that noun as the only member of the contextually retrievable set the predicate applies to.12 Other drinks, form fields, or languages on the table sit outside the set. The negative ending carries the "and nothing else" reading structurally, without a separate phrase.3
水しか飲まない。3
"I drink nothing but water."
君しか見ていない。6
"All I can see is you."
私はローマ字しか読めない。6
"I can only read romaji."
The restrictive force always carries a flavour of limitation. 私は日本語しか話せない signals a shortcoming, not a boast. For a neutral report, the speaker would reach for だけ instead.34
2. Quantity reading with number + counter
On a number-plus-counter or other quantity expression, しか marks the quantity as the only amount that qualifies, with the same mandatory negative predicate. The "and that is not enough" speaker feeling is most audible here.34
財布に百円しかない。4
"There is only 100 yen in the wallet."
一円玉しかない。5
"I have just a one-yen coin."
この車は二人しか乗れない。3
"Only two people fit in this car."
The number-plus-counter pattern is also the clearest place to see the polite-negative interaction: 3人しか来ませんでした carries the same "not enough" reading in polite speech.8
3. Verb-plain + しか + ない
Attached to the plain / dictionary form of a verb in the frame verb + しか + ない, しか reads as "have no choice but to do X" or "the only thing to do is X."9 The named action is the only member of the action-set the situation permits. The predicate ない is structurally negative even though the practical reading is "do X." Bunpro frames it as "(A) is the sole option," in contrast with だけ's "one option chosen from several."9
行くしかない。9
"I have no choice but to go."
素直に謝るしかないです。9
"I have no choice but to sincerely apologise."
もう笑うしかない。9
"I have no choice but to laugh."
頑張るしかない。10
"All we can do is keep trying our best."
This pattern is formally an N3 sentence-final construction (〜しかない as "no choice but to") with its own card on Bunpro.9 It is planted here at N5 as a recognition item because the verb attachment is the same しか in the same restrictive role. The full "no choice but to" treatment, plus the higher-level paraphrases 〜よりほかない and 〜ざるをえない, lives in the dedicated companion article on the ～しか～ない idiomatic pattern.
Daijisen records the same reading directly under the bare-particle entry, with the example この道を行くしかない.2
4. Case-particle stacked しか
Stacked after an oblique case particle, しか applies the restrictive reading to that particle's role.34 The order is fixed: oblique case particle, then しか, never the reverse. The predicate is forced negative.
言語によってしかお互いのメッセージを通じ合わせられない。1
"It is only through language that we can convey each other's messages."
遠いので、車で行くことしか出来ない。8
"Because it is far, you can only go by car."
午後しか空いていないみたいです。8
"It appears only the afternoon is available."
Maggie Sensei lists the canonical stacked combinations: にしか, でしか, としか, までしか.3 This pattern is the cleanest demonstration of the case-particle stacking asymmetry between しか and だけ.
The three N5 collocations: 〜しかいない, 〜しかない, 〜しかできない
These three forms are best learned as a recognition cluster. They share the しか-plus-negative frame. They differ in which existence or potential verb fills the predicate slot.
| Collocation | Predicate | Use |
|---|---|---|
| 〜しかいない | いない (animate existence) | only this person or animal exists |
| 〜しかない | ない (inanimate existence) | only this object exists; bare quantity; verb-plain "no choice but" |
| 〜しかできない | できない / 〜ない (potential) | only this much is possible |
〜しかいない: only people or animals exist
しか with the existence verb いる (for animate beings) and its negative form いない is the standard frame for restricting headcount and for "the only person who…" constructions.3 The animate / inanimate split follows the いる / ある distinction. The same noun cannot use ある in this pattern (×一人しかない for the people reading).4
子供が二人しかいない。4
"There are only two children."
一人しかいない。3
"There's only one person."
頼れる人は彼しかいない。3
"He is the only person I can rely on."
〜しかない: only objects exist, or the bare quantity / no-choice reading
しか with the inanimate existence verb ある in its negative form ない covers three overlapping uses: restricting inanimate quantity, restricting an object's existence outright, and the verb-plain + しかない idiom planted in core use 3.89 The bare quantity reading is the N5 testable target. The verb idiom is recognition-only.
一円玉しかない。5
"I have just a one-yen coin."
座るところがここしかありません。8
"There is nowhere else to sit but here."
冷蔵庫に牛乳しか残ってない。8
"There is nothing but milk remaining in the fridge."
〜しかできない: only this much is possible
しか combines either with the standalone verb できる in its negative できない or with the potential form of a content verb (書ける → 書けない, 読める → 読めない). The negative-potential ending carries both the ability frame and the しか-mandated negative polarity in one morpheme. That is why the pattern feels so compact in use.93
彼女のために、祈ることしかできない。3
"All I can do is pray for her."
私はローマ字しか読めない。6
"I can only read romaji."
遠いので、車で行くことしか出来ない。8
"Because it is far, you can only go by car."
This is the canonical frame learners use to describe what they cannot yet do in Japanese.
しか vs だけ: the headline disambiguation
The article on The だけ Particle: Only (Limit) is the companion to this section. Both pages use the same comparison and consistent terminology. Three rules sort the two particles.
Sentence-polarity rule
だけ takes an affirmative or negative predicate. しか requires a negative predicate.34 水だけ飲む ("drink only water") and 水しか飲まない ("drink nothing but water") translate to the same English "only water," but they are structurally different sentences with different verb polarities.34
財布に百円だけある。4
"There is only 100 yen in the wallet."
財布に百円しかない。4
"I have only 100 yen in my wallet."
The first sentence is a neutral report. The second carries an "and that is not enough" lament. ×水しか飲む is ungrammatical at every register.4
Speaker-feeling rule
だけ is neutral and reports a fact. しか carries the speaker's "not enough" feeling.34 Maggie Sensei draws the social-reading contrast explicitly: 百円だけあげる sounds more generous, while 百円しかあげない sounds stingy. Same scene, opposite social colouring.3
This is why だけ dominates in instructions, recipes, and signage, and しか dominates in complaints, regrets, laments, and confessions of limitation.
Case-particle stacking asymmetry
だけ stacks with case particles in either order, with a meaning shift (にだけ / だけに are both grammatical). しか stacks only one way (にしか is grammatical, ×しかに is ungrammatical).34 だけ also combines directly with the relational particles を, が (だけを, だけが), which しか does not allow at all.3
The asymmetry follows from the polarity rule: しか's restrictive force needs to land on the role-marked constituent, and reversing the order would break the constituency.34
Choosing between them: a decision flow for the N5 learner
The flow turns the three rules above into a practical order: polarity first, then speaker feeling, then stacking. The reinforced だけしか〜ない pattern is the most emphatic option and is shared territory with the だけ article.
Good to know
しか replaces は, が, を but stacks after に, で, から, へ, と
This asymmetry is the most commonly missed structural rule for the particle. The core grammatical-relation particles (は for topic, が for subject, を for direct object) drop under しか the way they drop under は or も. The oblique role particles (に, で, から, へ, と, まで) stay, and しか attaches after them.3 The mechanism is that しか's restrictive force can only land on a constituent whose role is already assigned. The oblique particles assign roles independently, while は / が / を are themselves the role-markers.
Japanese Particles Master overstates the rule as "しか cannot be used together with any case particle"; Maggie Sensei's list of attested stacked forms (にしか, でしか, としか, までしか) corrects this to the asymmetric generalisation above.34
言語によってしかお互いのメッセージを通じ合わせられない。1
"It is only through language that we can convey each other's messages."
The negative predicate is mandatory, even when the meaning is positive
水しか飲まない literally parses as "do not drink anything but water" and translates as "drink only water." The negative ない is structural, not practical meaning, and Wiktionary classifies the particle formally as a negative polarity item.10 In polite speech, the negative appears as ません, ありません, いません, or できません in the same slot. The past-negative なかった and ませんでした cover past restricted scenes.8 The pattern's compactness comes from packing the restrictive force into しか and the polarity into the predicate ending.
Learners who carry over the English "only X" frame and produce affirmative predicates are corrected on every N5 grammar section.
座るところがここしかありません。8
"There is nowhere else to sit but here."
The "not enough" feeling is built in; choose だけ if you want neutrality
Learners who pick しか for every "only" produce sentences that sound chronically complaining or self-deprecating to native ears. 私は日本語しか話せない signals limitation; the neutral report is 私は日本語だけ話せる.34 When the speaker wants to highlight scarcity, lament a shortage, or signal that an amount falls short of expectation, しか is the natural choice. When the speaker is simply describing the situation, だけ is the natural choice.
A short rule of thumb: if the English version would carry "unfortunately" or a sigh, use しか; if it would say "just X" with no sigh, use だけ.
Verb + しかない is the same particle, but the full idiom lives elsewhere
行くしかない, 待つしかない, and 諦めるしかない are all the しか particle in its restrictive role attached to a verb's plain form, with ない as the existence-verb negative ("no other option exists"). Bunpro splits the noun pattern (しか〜ない) at N4 from the verb pattern (しかない) at N3. This reflects the teaching convention that the verb pattern reads as a fixed sentence-final construction at higher levels.89 Daijisen's example この道を行くしかない shows the verb reading directly under the bare-particle entry.2
The full "no choice but to" sentence-pattern treatment, plus the paraphrases 〜よりほかない and 〜ざるをえない, lives in the dedicated article on the ～しか～ない idiomatic pattern; the pattern is planted here at N5 only as a recognition item.
行くしかない。9
"I have no choice but to go."
だけしか〜ない is reinforcement, not double meaning
名前だけしか書けない does not mean "only the only name." It means "only the name, and nothing else," with the restrictive reading pushed harder than either 名前だけ書けない or 名前しか書けない alone. Maggie Sensei treats the pattern as stylistic intensification: 朝から、パンだけしか食べていない emphasises that bread alone was eaten, reinforcing the negative constraint more strongly than しか alone.3 The pattern is used only in negative sentences.3
The polarity rule comes from しか (the predicate must be negative); the limit reading comes from both particles reinforcing each other.3 Learners should recognise the pattern at N5, but do not need to produce it.
Etymology
精選版 日本国語大辞典 records two possible derivations of しか: from the conditional form of the past auxiliary 「き」, or from the attributive 「し」 combined with the final particle 「か」.1 Wiktionary analyzes the surface form as し + か and notes historical connections to the classical demonstratives 然 (shikari) and 爾 (shika).10
The historical "if not / other than" meaning aligns with the modern polarity requirement: しか structurally encodes the exclusion ("if not X, then nothing"), and the negative predicate completes it. The 副助詞 / 係助詞 classification reflects this grammaticalisation. The particle does not assign a case role; it scope-marks a constituent and constrains the predicate's polarity.
Mnemonic
しか shuts the door. Every other option is shut out, and the negative predicate is the lock. Tofugu uses a complementary mathematical image: しか approaches a value and includes it, but just barely, like the mathematical ≤ or ≥.6 Both pictures capture the restrictive reading and the "and that's all" speaker feeling at once.
When in doubt, check three things: is the matrix predicate negative (it has to be); is the speaker signalling "not enough" (if yes, しか fits; if no, switch to だけ); is the case particle oblique (に / で / から / へ / と / まで). For oblique particles, stack as にしか and so on, never reversed. For は / が / を, drop them.
See also
- Japanese Particles (助詞): The Eight Categories Explained
- The さえ Particle: Even
- The ばかり Particle: Only / Just / About To
- The も Particle: Also, Too
- は vs が in Japanese: A Beginner's First Pass
- に vs. で for Location in Japanese: Existence vs. Action