Japanese question words stay exactly where the answer noun would sit, keeping the same particle that noun would use. In polite speech, they typically add か at the end, though casual speech often drops it and uses rising intonation instead. They generally do not jump to the front of the sentence, the way English wh-words do.
This guide is for N5 and N4 learners who keep translating English questions word for word. After reading, you will place なに, だれ, どこ, いつ, and どう correctly, with the right particle every time.
Quick Summary: Question words fill the same slot and take the same particle as the noun they replace — they do not move to the front like English wh-words.
| Question Word | Asks About | Typical Particle |
|---|---|---|
| なに (何) | things or activities — becomes なん before です/だ/の/で/counters | を, が, に, or no particle |
| だれ (誰) | people | が, を, に, の |
| どこ | places | で for actions, に for existence or destination |
| いつ | time | usually no particle, though から/まで attach for start/end points (いつから、いつまで) |
| どう | manner, method, condition, opinion, or reason (どうして) | no particle, often paired with ですか |
- Why English Speakers Move なに, だれ, どこ to the Front — and Japanese Never Does
- The One-Question Test: Could a Noun Fit Right There Instead?
- なに and だれ: When 何 Becomes なん, and Who Takes が, を, に, or の
- どこ and いつ: どこで vs どこに, and Why いつ Needs No Particle at All
- どう Isn’t One Question — どうですか, どうやって, and どうしましたか
- Frequently Asked Questions about Question Words in Japanese
- Quick Quiz: Test Your Question Words
- Summary: Keep Question Words in Place
Why English Speakers Move なに, だれ, どこ to the Front — and Japanese Never Does
The wh-fronting habit that doesn’t transfer
English pulls question words to the front of the sentence. You ask “What do you eat?”, not “You eat what?”. This habit feels automatic, so you expect Japanese to work the same way.
Japanese keeps the normal sentence order instead. The question word sits inside the sentence, in the exact spot the answer would occupy. Because of this habit, learners often hunt for a way to move なに, だれ, どこ, いつ, or どう to the start, when it isn’t needed.
Think of a Japanese question like a paper form: you don’t rearrange the sentence, you just drop the question word straight into the blank where the answer will eventually go, then stamp か at the very end to mark it as a question.
Unlike a form with one generic blank, each blank still demands the right kind of particle — が, を, に, で, or none. A form’s “name” blank and “date” blank expect different kinds of answers, and Japanese blanks work the same way.
The One-Question Test: Could a Noun Fit Right There Instead?
Build the answer sentence first
Could a normal noun fit into that exact spot, with that exact particle, and the sentence still make sense? If yes, your question word is in the right place.
Picture the answer first. Say you want to ask where someone studies, so imagine the answer “I study at the library” — 図書館で勉強します.
Swap 図書館 for どこ, and keep で attached. That gives you どこで勉強しますか, and a real noun could sit in that same spot with that same particle.
なに and だれ: When 何 Becomes なん, and Who Takes が, を, に, or の
Two sounds for one character, and a person’s particles
何 has two readings. It stays なに before を, が, or に, but switches to なん right before です, だ, の, で, でも, or counters like 何人 and 何時.
だれ works like any person-noun. It takes が for the subject, を for the object, に for a target or role, and の for possession.
Japanese: 次は誰の番ですか?
Romaji: Tsugi wa dare no ban desu ka?
English: Whose turn is next?
Why: だれ takes の to show possession, just like a person’s name would.
Japanese: すみません、何をお探しですか?
Romaji: Sumimasen, nani wo osagashi desu ka?
English: Excuse me, what are you looking for?
Why: なに stays なに right before を, the object particle.
どこ and いつ: どこで vs どこに, and Why いつ Needs No Particle at All
Place of action vs place of existence, plus the particle-free exception
どこで marks the place where an action happens, like studying or waiting. どこに marks where something exists, or where motion is headed.
いつ almost never takes a particle on its own. It does pair with から and まで, though, to ask about a starting or ending point.
Japanese: どこで待てばいいですか?
Romaji: Doko de mateba ii desu ka?
English: Where should I wait?
Why: どこで marks where the action of waiting happens.
Japanese: いつまで返品できますか?
Romaji: Itsu made henpin dekimasu ka?
English: Until when can I return this item?
Why: いつ pairs with まで to ask for an ending point.
どう Isn’t One Question — どうですか, どうやって, and どうしましたか
Opinion, method, or trouble — same word, three jobs
どう changes job depending on what follows it. どうですか asks for an opinion, or how something is going, not a method.
どうやって (or どうやったら) asks for the method or steps to do something. どうしましたか asks what’s wrong, or what happened, often at a clinic or shop.
どうして asks for a reason, close in meaning to なぜ. It shows up more in everyday conversation than なぜ does.
Unnatural: すみません、お名前はなにですか?
Natural: すみません、お名前はなんですか?
English “what” never changes its form, so it feels natural to expect なに to stay the same everywhere. But 何 shifts to なん right before です, so お名前はなんですか is the natural version.
Common Mistake: 明日、どこに勉強しますか? sounds off. Use 明日、どこで勉強しますか? instead — どこで marks where an action happens, while どこに marks where something exists or where you’re heading.
Frequently Asked Questions about Question Words in Japanese
Do I need か at the end of every question?
Not generally. Polite speech typically ends with か, but casual conversation often drops it. Rising intonation alone can mark a question in casual speech.
Can I use なに and なん interchangeably?
Not quite. なに fits before を, が, に, or a verb. なん fits right before です, だ, の, で, でも, and most counters.
Why does どこ sometimes need で and sometimes に?
で marks the place where an action happens, like studying or eating. に marks where something exists, or where movement is headed, like a destination.
Quick Quiz: Test Your Question Words
Try filling in the blank with the right question word and particle.
- すみません、お手洗いは＿＿＿ですか。(Where is the restroom?)
- 明日の会議に＿＿＿が来ますか。(Who is coming to tomorrow’s meeting?)
- この荷物は＿＿＿返品できますか。(Until when can I return this package?)
1. どこ – どこ fits right before です when asking about a location, with no extra particle needed here.
2. だれ – だれ takes が as the subject marker, asking who performs the action of coming.
3. いつまで – いつ pairs with まで to ask for the ending point, matching “until when.”
Summary: Keep Question Words in Place
- Question words sit exactly where the answer noun would go, keeping the same particle.
- なに becomes なん before です, だ, の, で, でも, and most counters.
- だれ takes が, を, に, or の, just like any person-noun.
- どこで marks where an action happens; どこに marks existence or destination.
- いつ usually takes no particle, except with から and まで.
- どう changes job depending on what follows: どうですか, どうやって, どうしましたか, どうして.
Once these five words feel natural, move on to combining them with casual and polite verb forms. That next step will sharpen your everyday conversation skills even further.
