Asking questions in Japanese is wonderfully tidy. You don't reshuffle the sentence and you don't even need a question mark — you tag a little か on the end, and to ask what or where you drop a question word into the exact slot where the answer will go. Below: the か marker, the whole family of question words, the famous なに-vs-なん wrinkle, and the これ・それ・あれ・どれ pointing set that the question words belong to.
The simplest question in Japanese is any normal sentence with the particle か stuck on the end. Nothing else moves:
学生です。 → 学生ですか。
gakusei desu → gakusei desu ka
"(He) is a student." → "Is (he) a student?" The word order is identical; か does all the asking. In writing a Japanese 。 or a Western ? both work; in casual speech the か is often dropped and a rising tone asks instead — 学生？ "a student?"
That handles yes/no questions. To ask who, what, where and the rest, you keep the か at the end and add a question word in the middle.
Notice how many start with the sound ど (do) — that's the "unknown" prefix, the same one in どれ (which one) and どこ (where). Learn the table and you can ask about almost anything.
| Word | Read | Means | Mini example |
|---|---|---|---|
| だれ 誰 | dare | who (polite: どなた donata) | だれですか dare desu ka — who is it? |
| なに 何 | nani / nan | what | 何ですか nan desu ka — what is it? |
| どこ | doko | where (polite: どちら dochira) | トイレはどこですか toire wa doko desu ka — where's the toilet? |
| いつ | itsu | when | いつですか itsu desu ka — when is it? |
| どうして | dōshite | why (also なぜ naze, なんで nande) | どうしてですか dōshite desu ka — why? |
| どう | dō | how, "in what way" | どうですか dō desu ka — how is it? |
| どの | dono | which + noun | どの本 dono hon — which book |
| どれ | dore | which one (of three+) | どれですか dore desu ka — which one? |
| どっち | docchi | which (of two), where (polite) | どっちがいい docchi ga ii — which is better? |
| いくら | ikura | how much (price) | いくらですか ikura desu ka — how much is it? |
| いくつ | ikutsu | how many; how old | おいくつですか o-ikutsu desu ka — how old are you? |
One sentence frame, ___ ですか (___ desu ka), gets you a long way: slot a question word in front of です and you can ask who, what, when, where, how, how much. The most useful traveller's question of all — トイレはどこですか — is just "toilet" + topic は + "where" + ですか.
This is the one mental shift for English speakers. In English the question word leaps to the front: "What did you buy?" In Japanese it stays planted in the same slot the answer would fill — and か still closes the sentence:
何を買いましたか。
nani o kaimashita ka — literally "what(object) bought?"
Answer in the very same slot: パンを買いました pan o kaimashita — "(I) bought bread." You just swap 何 for the answer. Notice the question word still takes its particle — 何を (object), だれが (subject), どこへ (direction) — exactly as the answer would.
何 ("what") is read two ways, and choosing wrong is the giveaway of a beginner. The rule is about the sound that follows:
| Read | Used before… | Examples |
|---|---|---|
| なん nan | です, counters, and words starting with t / d / n sounds | 何ですか nan desu ka · 何時 nan-ji — what time · 何人 nan-nin — how many people · 何の nan no — what kind of |
| なに nani | most other cases — before を, が, and as a standalone word | 何を nani o — what (object) · 何が nani ga — what (subject) · 何で行く nani de iku — by what (means) |
A quick memory hook: "nan" before です and any counter; "nani" before を and が. You'll get the rest by ear. (Watch out: 何で is nani de "by what means" but nande as one word means "why" — context sorts it out.)
The question words belong to a neat four-way system Japanese learners call ko-so-a-do (こそあど). Three of the four point at something by distance; the fourth — the ど row — is the question. Learn one row and the rest rhyme:
| Distance | thing | + noun | place | direction / which-of-2 |
|---|---|---|---|---|
| こ near me | これ kore — this | この kono — this ~ | ここ koko — here | こっち kocchi |
| そ near you | それ sore — that | その sono — that ~ | そこ soko — there | そっち socchi |
| あ over there | あれ are — that (yonder) | あの ano — that ~ | あそこ asoko — over there | あっち acchi |
| ど which? | どれ dore — which one | どの dono — which ~ | どこ doko — where | どっち docchi |
Read the columns top to bottom and the pattern teaches itself: これ・それ・あれ・どれ, then ここ・そこ・あそこ・どこ. The question word in each column is just the ど row — so どこ ("where") is literally "which place", and どれ ("which one") is the question twin of これ.
To answer a question word, you replace it with the real information in the same slot. To answer a yes/no か question, lead with はい (hai, yes) or いいえ (iie, no):
And a softer everyday move: drop か, raise your tone, and you've asked casually — これ？ "this one?" That rising tone is the same shortcut English uses, so it comes easily.
Question words are pure kana. だれ, なに, どこ, いつ — every one is hiragana you'll read constantly, so the script needs to be instant before the grammar sticks. The kana typing game flashes a character and asks you to type its romaji against the clock, turning recognition into a reflex.
Next steps: see how the little markers like は, を and か work in Japanese particles, pick up everyday lines in greetings & phrases, or count the things you're asking about with the right counter words.