目錄
The Japanese expressions 「何か／誰か／どこか」 look easy to understand, but once they appear in actual sentences, they are easily confused with the original question words 「何／誰／どこ」. For example, 「何を食べますか」 asks specifically what someone will eat, while 「何か食べますか」 is closer to “Would you like something to eat?” and what the food will be can be decided later. Similarly, 「誰が来ますか」 asks who is coming, while 「誰か来ますか」 only checks whether someone will come.
This difference is related to the particles that follow question words. When 「か」 is added, a question word that originally asks for a specific answer becomes an unspecified person, thing, or place—something that exists but has not yet been identified. Meanwhile, 「何も」「誰も」「どこにも」 and 「何でも」「誰でも」「どこでも」 respectively express “not even one” and “any one is fine.” Comparing these forms together makes their differences easier to see than memorizing each set separately.
What Is the Japanese Pattern “Question Word＋か”? The Basic Meanings of 「何か／誰か／どこか」
In Japanese, “question word＋か” turns a question word that originally asks a question into an indefinite expression. 「何か」 means some thing or matter, 「誰か」 means someone, 「どこか」 means somewhere, and 「いつか」 means some uncertain time.
Here, 「か」 is not the question particle used at the end of a sentence to form a question. The final 「か」 in 「誰が来ましたか」 asks who came. In 「誰かが来ました」, however, 「か」 combines with 「誰」 to mean “someone,” and the sentence as a whole remains a statement.
- Example: 何か飲みますか。Kana: なにかのみますか。
Translation: Would you like something to drink?
「何か」 refers to a drink or thing that has not yet been specified. The focus is on asking whether the person would like something to drink, not on demanding an immediate, specific choice. - Example: 誰かがドアをノックしています。
Kana: だれかがドアをノックしています。
Translation: Someone is knocking on the door.
The person knocking definitely exists, but their identity is still unknown, so 「誰か」 is used. - Example: 週末、どこかへ出かけたいです。
Kana: しゅうまつ、どこかへでかけたいです。
Translation: I want to go somewhere this weekend.
The desire to go out has already been decided, but the destination has not, so 「どこかへ」 is used.
How “Question Word＋か” Connects in Japanese: Omitting 「が／を」 and Using 「に／へ／で／と」
Once “question word＋か” has been formed, the entire expression can be placed in a sentence like a noun and followed by particles such as 「が」「を」「に」「へ」「で」「と」 according to its function. For example, 「誰かに聞く」 means to ask someone, 「どこかで食べる」 means to eat somewhere, and 「誰かと話す」 means to talk with someone.
「が」 and 「を」 are often omitted in conversation, so both 「誰かが来ました」 and 「誰か来ました」, as well as 「何かを食べますか」 and 「何か食べますか」, are common. By contrast, 「に」「へ」「で」「と」 usually need to remain because they indicate a place, direction, or person involved.
| Form | Meaning | Common particles | Example |
| 何か | Some matter or thing | が／を／に | 何かありますか |
| 誰か | Someone | が／に／と | 誰かに聞きます |
| どこか | Somewhere | に／へ／で／から | どこかで会います |
| いつか | Some time, someday | は／までに | いつか日本へ行きたい |
| どれか | One of several options | を | どれかを選んでください |
| どちらか | One of two options | が／を | どちらかを選びます |
| 何人か | Several people | が | 何人か来ました |
Why Are 「が／を」 Often Omitted in 「誰か来ました」 and 「何か食べます」?
In conversation, 「誰かが来ました」 is often said simply as 「誰か来ました」, and 「何かを食べますか」 commonly becomes 「何か食べますか」. Omitting these particles does not affect the basic relationship between the person or thing and the action.
「に」「へ」「で」「と」 are different. The 「に」 in 「誰かに聞く」 marks the person being asked, and the 「で」 in 「どこかで食べる」 marks the place where the action occurs. Removing them changes the roles expressed in the sentence.
- Example: 誰かにこの機械の使い方を聞いてみます。
Kana: だれかにこのきかいのつかいかたをきいてみます。
Translation: I’ll ask someone how to use this machine.
「誰か」 does not identify a particular person, while 「に」 marks the person being asked. - Example: 仕事の帰りに、どこかでご飯を食べませんか。
Kana: しごとのかえりに、どこかでごはんをたべませんか。
Translation: Would you like to eat somewhere on the way home from work?
「で」 marks the place where the action of eating occurs, so the sentence cannot simply leave 「どこか」 on its own. - Example: 今日は誰かと話したい気分です。
Kana: きょうはだれかとはなしたいきぶんです。
Translation: I feel like talking to someone today.
「と」 marks the person with whom the action of speaking is done, and that person has not yet been specified.
Why Does 「何かありますか」 Contain Two Instances of 「か」? Indefinite Expressions vs the Question Particle
「何かありますか」 actually contains two instances of 「か」 with different functions. The first is inside 「何か」 and changes 「何」 into “something.” The final 「か」 in 「ありますか」 is what turns the entire sentence into a question.
Therefore, 「何がありますか」 and 「何かありますか」 both ask about things, but their focus is different.
「何がありますか」 asks directly about the content and expects a specific name in the answer. 「何かありますか」 first assumes that something may exist and then asks whether it actually does.
「何がありますか」 vs 「何かありますか」: Asking for Content vs Confirming Existence
- Example: 冷蔵庫には何がありますか。
Kana: れいぞうこにはなにがありますか。
Translation: What is in the refrigerator?
「何」 itself is a question word and expects a specific answer such as milk, fruit, or drinks. - Example: 冷蔵庫に何かありますか。
Kana: れいぞうこになにかありますか。
Translation: Is there anything in the refrigerator?
This sentence first asks whether something exists. The answer can simply be 「はい、あります」, or the person can go on to name the items. - Example: 何か食べるものはありますか。
Kana: なにかたべるものはありますか。
Translation: Is there anything to eat?
「何か」 does not limit the question to a specific food. Anything that satisfies the condition “can be eaten” is sufficient.
「誰が来ますか」 vs 「誰か来ますか」: Asking Who It Is vs Asking Whether Anyone Is Coming
「誰が来ますか」 asks who the person coming is, while 「誰か来ますか」 checks whether anyone will come. The first sentence requires an answer identifying the person, while the second remains valid even if the answer is only 「はい、来ます」.
- Example: 明日の会議には誰が来ますか。
Kana: あしたのかいぎにはだれがきますか。
Translation: Who will come to tomorrow’s meeting?
The blank in the question is the person’s identity, so the answer will be a specific person such as Mr. Tanaka or the department manager. - Example: 明日の会議には誰か来ますか。
Kana: あしたのかいぎにはだれかきますか。
Translation: Will anyone come to tomorrow’s meeting?
「誰か」 already means an unspecified person, so the question only checks whether such a person exists. - Example: 受付に誰かいますか。
Kana: うけつけにだれかいますか。
Translation: Is anyone at the reception desk?
This sentence usually does not ask for the receptionist’s name. It only checks whether someone is currently there.
「どこへ行きますか」 vs 「どこかへ行きますか」: Asking for a Place vs Asking Whether Someone Is Going Out
「どこへ行きますか」 requires a place as the answer. 「どこかへ行きますか」 only checks whether there are plans to go out, and the destination may not need to be stated.
- Example: 休みの日はどこへ行きますか。
Kana: やすみのひはどこへいきますか。
Translation: Where do you go on your day off?
The question word 「どこ」 requires a specific place as the answer. - Example: 休みの日はどこかへ行きますか。
Kana: やすみのひはどこかへいきますか。
Translation: Do you go anywhere on your day off?
The focus of the question is whether the person will go out, and the destination can remain unspecified. - Example: 午後、どこかに寄りますか。
Kana: ごご、どこかによりますか。
Translation: Will you stop somewhere this afternoon?
「どこかに」 only indicates that there may be a place to visit and does not require the place to be named in advance.
How Are 「何か／誰か／どこか」 Used? Three Japanese Indefinite Expressions
How to Use 「何か」: Meaning “Something” and Also “Somehow” or “A Little”
The most basic meaning of 「何か」 is some thing or matter. It can be used when the content exists but its type, name, or details have not yet been specified.
There is another very common conversational use, as in 「何か変ですね」 and 「何かわかりにくい」. Here, 「何か」 does not literally refer to a particular object. It is closer to “somehow” or “a little hard to put into words,” leaving the feeling that follows somewhat vague.
- Example: 何か困ったことがあったら、受付に相談してください。
Kana: なにかこまったことがあったら、うけつけにそうだんしてください。
Translation: If you have any trouble, please ask at the reception desk.
「何か困ったこと」 does not limit the type of problem in advance and includes any situation in which help is needed. - Example: お土産に何か甘いものを買いたいです。
Kana: おみやげになにかあまいものをかいたいです。
Translation: I want to buy something sweet as a souvenir.
The specific item has not been decided; only the category “something sweet” has been set. - Example: この説明、何かわかりにくいですね。
Kana: このせつめい、なにかわかりにくいですね。
Translation: This explanation is somehow a little hard to understand.
Here, 「何か」 is close to “somehow” or “it is hard to say exactly why,” rather than searching for a concrete “something.”
How to Use 「誰か」: Referring to an Unidentified Person
「誰か」 indicates that at least one person exists, but their identity has not yet been determined or there is no need to give their name. The particle that follows determines whether this person performs the action, receives the action, or accompanies someone in the action.
「誰かが」 means that someone does something, 「誰かに」 means doing something to or toward someone, and 「誰かと」 means performing an action together with someone.
- Example: 誰かが受付で待っています。
Kana: だれかがうけつけでまっています。
Translation: Someone is waiting at the reception desk.
It is known that a person is waiting, but their identity is not yet known. - Example: 分からなければ、誰かに聞いてみてください。
Kana: わからなければ、だれかにきいてみてください。
Translation: If you do not understand, try asking someone.
You only need to find a person who can answer; it does not have to be any particular person. - Example: 旅行中に誰かと一緒に食事するのも楽しいです。
Kana: りょこうちゅうにだれかといっしょにしょくじするのもたのしいです。
Translation: It is also enjoyable to eat with someone while traveling.
「誰かと」 indicates that the person accompanying the action has not been specified.
How to Use 「どこか」: Referring to an Undecided Place
「どこか」 can indicate a destination, a location, or the place where an action occurs. In 「どこかへ」「どこかに」「どこかで」, the difference comes from the particle that follows, not from 「どこか」 itself.
「へ」 tends to indicate a direction of movement, 「に」 often marks a destination or a location where something exists, and 「で」 marks the place where an action occurs.
- Example: 今度の休みに、どこかへ旅行したいです。
Kana: こんどのやすみに、どこかへりょこうしたいです。
Translation: I want to travel somewhere during my next vacation.
The desire to travel is settled, but the destination has not yet been chosen. - Example: パスポートをどこかに置いたはずです。
Kana: パスポートをどこかにおいたはずです。
Translation: I must have put my passport somewhere. I know that I put it down, but I cannot remember the exact place now. - Example: 駅の近くで、どこかで少し休みませんか。
Kana: えきのちかくで、どこかですこしやすみませんか。
Translation: Would you like to rest somewhere near the station for a while?
「どこかで」 leaves the actual place to rest unspecified, so options such as a café or rest area can still be discussed later.
What Is the Difference Between “Question Word＋か／も／でも”? Indefinite Reference, Total Negation, and Unrestricted Choice
“Question word＋か” indicates that one object exists but has not yet been identified. “Question word＋も” often negates the entire range in a negative sentence. “Question word＋でも” opens the range of choices and means that any one is acceptable.
The three easiest sets to remember are 「何か／何も／何でも」, 「誰か／誰も／誰でも」, and 「どこか／どこにも／どこでも」.
| Comparison | Question word＋か | Question word＋も＋negative | Question word＋でも |
| Basic meaning | One object that has not yet been specified | Not even one within the range | Any one within the range is acceptable |
| Range of choices | An object satisfies the conditions, but which one has not been specified | Excludes all possible objects | Does not restrict which one is chosen |
| People | 誰か: someone, an unspecified person | 誰も〜ない: no one, nobody does | 誰でも: anyone, any person is acceptable |
| Things | 何か: something, some matter | 何も〜ない: nothing, does not do anything | 何でも: anything, any thing is acceptable |
| Places | どこか: somewhere | どこにも〜ない／どこへも〜ない: nowhere, does not go anywhere | どこでも: anywhere |
| Whether the specific object is known | Unknown or does not currently need to be specified | No object satisfies the condition | No need to limit the expression to a specific object |
| Common patterns | 何か食べる、誰かに聞く、どこかへ行く | 何も食べない、誰も来ない、どこにも行かない | 何でも食べる、誰でも参加できる、どこでもいい |
| Nuance in questions | Asks whether a person, thing, or place exists | Usually does not form an ordinary question, but works with a negative form to exclude the entire range | Indicates that any choice meets the condition |
| Common English translations | some, someone, something, somewhere | nothing, no one, nowhere | anything, anyone, anywhere |
| What to check first | Whether one undecided option remains | Whether the entire range is negated | Whether there is no restriction at all on which one is chosen |
| Example | 何か食べたいです。 | 何も食べたくないです。 | 何でも食べられます。 |
| Meaning of the example | Want to eat something but have not decided what | Do not want to eat anything | Can eat anything |
This explanation of 「も」 begins with the forms most often encountered at the beginner level: 「何も〜ない」「誰も〜ない」「どこにも〜ない」, which negate the entire range. However, “question word＋も” does not mean that the following form must always be negative. Forms such as 「どこも混んでいる」「どれもおいしい」「いつも忙しい」 can also appear in affirmative sentences. Their meanings must be considered separately and cannot simply be interpreted as “not even one.”
▌「何か／何も／何でも」: Something, Nothing, and Anything
「何か」 leaves one item that may exist, 「何も〜ない」 negates all items, and 「何でも」 means that the items are unrestricted.
❌ Different meaning: 何も食べます。
✅ Something: 何か食べます。
✅ Eat nothing: 何も食べません。
✅ Eat anything: 何でも食べます。
The most important beginner use of 「何も」 is with a negative form. To say that anything is acceptable, you cannot simply remove the negative form; you must change the expression to 「何でも」.
▌「誰か／誰も／誰でも」: Someone, No One, and Anyone
「誰か」 indicates that at least one person exists, 「誰も〜ない」 means that not even one person exists, and 「誰でも」 does not restrict which person it is.
❌ Different meaning: 誰か参加できます。
✅ Someone participates: 誰かが参加します。
✅ No one participates: 誰も参加しません。
✅ Anyone can participate: 誰でも参加できます。
「誰でも」 does not mean “the person is unknown.” It means “any person satisfies the condition.” This is very different from 「誰か」, which refers to one unknown person.
▌「どこか／どこにも／どこでも」: Somewhere, Nowhere, and Anywhere
Expressions involving places require particular attention to particles. “Not going anywhere” is usually expressed as 「どこにも行かない」 or 「どこへも行かない」, rather than simply changing 「どこか」 to 「どこも」.
❌ Somewhere: 週末はどこかへ行きます。
✅ Go nowhere: 週末はどこにも行きません。
✅ Anywhere is fine: 行き先はどこでもいいです。
「どこか」 leaves one place unspecified, while 「どこでも」 removes restrictions on the place. When making plans, the former means the destination has not yet been decided, while the latter means any destination is acceptable.
▌How Does the Meaning Change When 「何か／何も／何でも」 Appear in the Same Situation?
Placing 「何か／何も／何でも」 in the same dining situation makes the difference much clearer than memorizing English translations separately. Suppose it is dinnertime. 「何か食べたいです」 simply means that the speaker has not decided what to eat. 「何も食べたくないです」 means that the speaker currently does not want any food. 「何でもいいです」 means the exact opposite: anything edible is fine, with no desire to specify a particular type.
- Example: 何か食べたいです。
Kana: なにかたべたいです。
Translation: I want to eat something.
The desire to eat is already present, but ramen, curry, sushi, and the other options are still undecided. 「何か」 leaves one unspecified food as an option. - Example: 今日は何も食べたくないです。
Kana: きょうはなにもたべたくないです。
Translation: I do not want to eat anything today.
This does not mean that the speaker has not chosen a food yet. No food currently falls within the range of things they want to eat. 「何も」 combines with the negative form 「食べたくない」 and excludes all options. - Example: 晩ご飯は何でもいいです。
Kana: ばんごはんはなんでもいいです。
Translation: Anything is fine for dinner.
This sentence does not exclude any options, nor is it searching for one unknown food. Ramen, curry, sushi, and other options are all acceptable, so 「何でも」 is used.
All three sentences relate to what to eat, but the options actually left available are completely different. 「何か」 leaves one undecided option, 「何も〜ない」 removes every option, and 「何でも」 leaves every option open. The same method can be used to see how the range changes with 「誰か／誰も／誰でも」 and 「どこか／どこにも／どこでも」.
Does Japanese “Question Word＋も” Always Take a Negative Form? Affirmative Uses of 「どこも／どれも／いつも」
Memorizing every “question word＋も” form as one that “must take a negative form” leads to many exceptions. At the beginner level, 「誰も」 and 「何も」 most commonly occur with negative forms, but 「どこも」「どれも」「いつも」 are also very common in affirmative sentences.
For example, 「どこも混んでいます」 means that everywhere is crowded, 「どれもおいしいです」 means that every one is delicious, and 「いつも忙しいです」 means that someone is always busy.
| Form | Common meaning in affirmative sentences | Common meaning in negative sentences |
| 誰も | Generally not used to mean “everyone”; 「みんな／誰でも」 is used instead | No one, nobody |
| 何も | Generally does not mean “everything” | Nothing, not anything |
| どこも | Everywhere | Depends on the pattern; 「どこにも〜ない」 is often used to mean “nowhere” |
| どれも | Every one | Not a single one |
| いつも | Always | Interpreted according to the meaning of the whole sentence |
- Example: 連休なので、どこも人が多いです。
Kana: れんきゅうなので、どこもひとがおおいです。
Translation: Because it is a long holiday, there are many people everywhere.
「どこも」 appears with an affirmative sentence and indicates that every place has the state described afterward. - Example: この店のケーキは、どれもおいしいです。
Kana: このみせのケーキは、どれもおいしいです。
Translation: Every cake in this shop is delicious.
「どれも」 includes all the options in its range and does not require a negative form. - Example: 今日はどこにも行きません。
Kana: きょうはどこにもいきません。
Translation: I am not going anywhere today.
When all places are negated, 「に」 appears before 「も」 to form 「どこにも」.
How to Choose Between 「何か／誰か／どこか」 and 「何でも／誰でも／どこでも」
To decide which form to use, check whether only one unspecified option is needed or whether every option is acceptable.
「どこかで食べたい」 means that the speaker wants to eat at one place but has not decided where. 「どこでもいい」 means there is genuinely no preference about the location.
「誰かに聞く」 means to ask one person, while 「誰にでも聞ける」 means that anyone can be asked and there is no restriction on the person.
- Example: 何か飲みたいです。
Kana: なにかのみたいです。
Translation: I want something to drink.
Only one kind of drink is needed, and the specific drink has not yet been decided. - Example: 飲み物は何でもいいです。
Kana: のみものはなんでもいいです。
Translation: Any drink is fine.
The choices are unrestricted, and tea, coffee, or juice would all be acceptable. - Example: 困ったときは、誰にでも相談できるわけではありません。
Kana: こまったときは、だれにでもそうだんできるわけではありません。
Translation: When you are in trouble, it is not necessarily possible to consult just anyone.
「誰にでも」 opens the entire range of people, and the negative expression that follows then restricts that judgment.
Japanese 「何か／誰か／どこか」 for Travel: Practical Restaurant, Hotel, and Place-Finding Dialogues
When traveling, “question word＋か” appears especially often in situations where the specific choice has not yet been decided. Asking for a recommendation in a restaurant, finding someone who can help at a hotel, or suddenly looking for somewhere to eat with a travel companion does not require knowing the answer in advance.
This is also the biggest difference between 「何か」「誰か」「どこか」 and direct question words. A direct question word demands an answer, while “question word＋か” first leaves an unspecified slot open.
▌Situation 1｜Asking for a Recommended Souvenir in a Shop
A: 何かおすすめのお菓子はありますか。
なにかおすすめのおかしはありますか。
Do you have any recommended sweets?
B: こちらの抹茶クッキーが人気です。
こちらのまっちゃクッキーがにんきです。
These matcha cookies are popular.
📌 Grammar Point: 「何か」 does not specify a product name and only narrows the range to “recommended sweets.” The shop clerk can suggest one item that meets the condition.
▌Situation 2｜Finding Someone Who Can Help at a Hotel
A: すみません、誰か日本語が話せる方はいらっしゃいますか。
すみません、だれかにほんごがはなせるかたはいらっしゃいますか。
Excuse me, is there anyone who speaks Japanese?
B: はい、少々お待ちください。担当者を呼んできます。
はい、しょうしょうおまちください。たんとうしゃをよんできます。
Yes, please wait a moment. I’ll get the person in charge.
📌 Grammar Point: 「誰か」 only requires that one person satisfy the condition “can speak Japanese.” Their name or position does not need to be known in advance.
▌Situation 3｜Finding a Restaurant After Work or While Traveling
A: このあと、どこかでご飯を食べませんか。
このあと、どこかでごはんをたべませんか。
Would you like to eat somewhere after this?
B: いいですね。駅の近くならどこでも大丈夫です。
いいですね。えきのちかくならどこでもだいじょうぶです。
Sounds good. Anywhere near the station is fine.
📌 Grammar Point: A’s 「どこかで」 indicates that the restaurant has not been decided. B’s 「どこでも」 means that any actual restaurant is acceptable as long as it is near the station.
Cultural Notes:
- Japanese conversation often uses 「何か」 and 「どこか」 to reduce how specifically an option is identified. 「何を食べますか」 requires the speakers to begin discussing a particular food, while 「何か食べますか」 can merely check whether someone wants to eat. The difference is not simply one of formality versus conversational style.
- 「が」 and 「を」 after 「誰か」 and 「何か」 are often omitted in everyday conversation, so 「誰か来ましたよ」 and 「何か食べますか」 are extremely common. 「に」「で」「へ」「と」 are usually retained because they still need to explain the role of the person or place in the sentence.
- The 「何か」 in 「何か変」 and 「何か気になる」 is already very close to “somehow” or “a little.” This use does not identify a specific thing and is common in everyday conversation, commentary, and dialogue in films and television dramas.
How Do Japanese 「何か／誰か／どこか」 Compare with Korean 「뭔가／누군가／어딘가」?
Japanese 「何か」「誰か」「どこか」 respectively refer to an unspecified thing, person, and place. Korean 「뭔가／무언가」「누군가」「어딘가」 have similar functions and can turn a question word that asks for a specific answer into “something,” “someone,” or “somewhere.”
However, the forms are not constructed in the same way in the two languages. Japanese adds 「か」 after 「何」「誰」「どこ」. Korean involves a combination and contraction of a question word, the copula 「이-」, and the interrogative ending 「-ㄴ가」. The National Institute of Korean Language analyzes 「누군가」 as a contraction of 「누구인가」. 「뭔가」 can be analyzed as a contraction of 「뭐＋이-＋-ㄴ가」, while 「어딘가」 comes from a contraction of 「어디＋이-＋-ㄴ가」. It is therefore appropriate to compare how the two languages express an “unspecified object,” but Japanese 「か」 and the final Korean 「가」 should not be treated as the same particle. 누군가、뭔가、어딘가
◆ Similar Expression 1: Korean 「뭔가／무언가」
「뭔가／무언가」 refer to something that has not yet been identified or explicitly stated and are very close to Japanese 「何か」. 「뭔가」 is more common in everyday conversation, while 「무언가」 is the fuller form and is also more likely to appear in written narration or when deliberately creating a more careful tone.
- Example: 뭔가 먹고 싶어요.
Romanization: mwon-ga meok-go si-peo-yo.
Translation: I want to eat something.
This corresponds to Japanese 「何か食べたいです」. Neither sentence specifies a kind of food; both only express the desire to eat. The object particle can be omitted in this type of conversational sentence in both Korean and Japanese. The full forms 「뭔가를 먹고 싶어요」 and 「何かを食べたいです」 are also possible. - Example: 상자 안에서 무언가가 움직이고 있어요.
Romanization: sang-ja a-ne-seo mu-eon-ga-ga um-ji-gi-go i-sseo-yo.
Translation: Something is moving inside the box.
This corresponds to Japanese 「箱の中で何かが動いています」. The second 「가」 after Korean 「무언가」 is the subject particle. Japanese likewise places 「が」 after 「何か」 to mark the thing that is moving. - Example: 오늘은 뭔가 이상해요.
Romanization: o-neu-reun mwon-ga i-sang-hae-yo.
Translation: Something feels a little strange today.
In Japanese, this can be expressed as 「今日は何か変です」. If the focus is not on a concrete thing but on the speaker’s feeling that the situation is not quite right, it can also be translated as 「今日はなんだか変です」. Korean 「뭔가」 can refer not only to something but also vaguely express a feeling or reason that is difficult to explain clearly.
◆ Similar Expression 2: Korean 「누군가」
「누군가」 refers to a person whose identity has not yet been determined, someone whose identity is unknown, or someone whose identity does not need to be stated. It is close to Japanese 「誰か」. In Korean, particles such as 「가」「에게」「와」 can follow 「누군가」 to mark the person’s function in the sentence.
- Example: 누군가 문 앞에 있어요.
Romanization: nu-gun-ga mun a-pe i-sseo-yo.
Translation: Someone is at the door.
This corresponds to Japanese 「誰かがドアの前にいます」. In Korean, it is known that someone is at the door, but the person’s identity has not been confirmed or stated. The subject particle 「가」 is omitted here; the full form is 「누군가가 문 앞에 있어요」. - Example: 누군가가 제 이름을 불렀어요.
Romanization: nu-gun-ga-ga je i-reu-meul bul-leo-sseo-yo.
Translation: Someone called my name.
This corresponds to Japanese 「誰かが私の名前を呼びました」. On the surface, Korean 「누군가가」 contains two consecutive instances of 「가」, but the first 「가」 is part of 「누군가」 itself and only the second is the subject particle. The same particle is therefore not being repeated. - Example: 누군가에게 이 이야기를 하고 싶어요.
Romanization: nu-gun-ga-e-ge i i-ya-gi-reul ha-go si-peo-yo.
Translation: I want to tell someone this story.
This corresponds to Japanese 「誰かにこの話をしたいです」. Korean adds 「에게」 after 「누군가」 to mark the recipient of the words, while Japanese adds 「に」 after 「誰か」.
◆ Similar Expression 3: Korean 「어딘가」
「어딘가」 refers to a place that has not yet been identified, is unknown, or has not been stated. Its function is close to Japanese 「どこか」. In actual use, particles such as 「에」「에서」「로」 can follow it to indicate a destination, the place where an action occurs, or a direction of movement.
- Example: 주말에는 어딘가에 가고 싶어요.
Romanization: ju-ma-re-neun eo-din-ga-e ga-go si-peo-yo.
Translation: I want to go somewhere this weekend.
This corresponds to Japanese 「週末はどこかへ行きたいです」. The destination has not yet been decided. Korean uses 「어딘가에」 to mark the place being traveled to, while Japanese can use 「どこかへ」 or 「どこかに」. - Example: 휴대폰을 어딘가에 두고 왔어요.
Romanization: hyu-dae-pon-eul eo-din-ga-e du-go wa-sseo-yo.
Translation: I left my phone somewhere.
This corresponds to Japanese 「携帯電話をどこかに置いてきました」. The speaker knows that the phone was left elsewhere but cannot currently identify the exact location, so both languages use an indefinite expression for the place. - Example: 어딘가에서 음악 소리가 들려요.
Romanization: eo-din-ga-e-seo eu-mak so-ri-ga deul-lyeo-yo.
Translation: I can hear music coming from somewhere.
This corresponds to Japanese 「どこかから音楽が聞こえます」. Korean uses 「어딘가에서」 to mark the place where the sound is heard, while Japanese uses 「どこかから」 to indicate the source of the sound. The particles chosen in the two languages do not need to match word for word.
◆ Core Differences from Japanese 「何か／誰か／どこか」:
Japanese forms indefinite expressions through “question word＋か,” as in 「何か」「誰か」「どこか」, and can then add particles such as 「を」「が」「に」「へ」「と」. Korean 「뭔가／무언가」「누군가」「어딘가」 are already formed indefinite expressions and can likewise take particles such as 「를／을」「가」「에게」「에」「에서」「와／과」 according to their function in the sentence.
In both Japanese and Korean, subject and object particles may be omitted in conversation. For example, 「뭔가 먹고 싶어요」 and 「何か食べたいです」 both omit the object particle. Particles marking a destination, location of an action, or person involved are generally harder to omit directly, so Korean uses 「어딘가에 가다」「누군가에게 말하다」, while Japanese uses forms such as 「どこかへ行く」「誰かに話す」 according to the sentence. In addition, Korean 「뭔가」 can express a feeling that is difficult to explain clearly. In this case, Japanese may use not only 「何か」 but also 「なんだか」 depending on the context. Translation therefore requires determining not only whether the expression refers to a thing, person, or place, but also whether it truly represents an object or vaguely describes the speaker’s feeling.
What makes 「何か／誰か／どこか」 most confusing is not the words themselves, but the way their differences often disappear in translation. 「何を食べますか」 and 「何か食べますか」 may both be translated as “What would you like to eat?” and 「どこへ行きますか」 and 「どこかへ行きますか」 may also look very similar in English. In Japanese, however, one waits for a specific answer while the other simply leaves an undecided option open.
The same applies to 「も」 and 「でも」. 「何か」 represents something that has not been specified, 「何も〜ない」 means nothing exists, and 「何でも」 means anything is acceptable. 「誰か／誰も／誰でも」 and 「どこか／どこにも／どこでも」 can be understood in the same way. When you encounter these sets, there is no need to rush to find a fixed English translation. Look at whether the sentence is asking for a specific answer, retaining one option, excluding everything, or imposing no restriction at all, and the difference will usually become clear.
FAQs
「何か」 means something, some matter, or unspecified content. It is an indefinite expression formed from 「何＋か」. 「何か食べたい」 means that someone wants something to eat without naming a specific item, while the conversational 「何か変ですね」 can mean “something feels a little strange.”
「何を」 directly asks for specific content, while 「何か」 means something that has not yet been specified. 「何を食べますか」 asks what someone wants to eat, while 「何か食べますか」 is closer to asking whether they would like something to eat. The two sentences expect different kinds of answers.
「誰か」 means one unspecified person, 「誰も〜ない」 means not even one person, and 「誰でも」 means any person is acceptable. For example, 「誰かが来ます」 means someone is coming, 「誰も来ません」 means no one is coming, and 「誰でも参加できます」 means anyone can participate.
No. 「どこか」 means one place that has not yet been specified, while 「どこでも」 means any place is acceptable. 「どこかへ行きたい」 means wanting to go somewhere without having decided where, while 「どこでもいい」 means there is no particular restriction on the location.
「が」 and 「を」 are often omitted in everyday conversation, so 「誰か来ました」 and 「何か食べますか」 are both natural. 「に」「で」「へ」「と」, which mark a person, place, direction, or joint action, usually need to remain, producing forms such as 「誰かに聞く」「どこかで食べる」「誰かと話す」.