どうして means why or how come. It is a JLPT N5 Japanese grammar pattern used to ask the reason for something.
This grammar point appears often in beginner conversations, textbooks, and JLPT-style reading questions. If you want to ask reasons naturally in Japanese conversation, どうして is a useful pattern to learn early because it connects directly to everyday communication.
What does どうして mean?
Use どうして when you want to ask for a reason or cause.
Natural translations include:
- why
- how come
- for what reason
The exact English translation changes with context. The important point is to understand what job the pattern is doing in the sentence, not to memorize only one English phrase.
How to form どうして
どうして + sentence + か / どうして + casual sentence?
Examples of the pattern:
- どうしてですか
- どうして行きませんか
- どうしてそう思いますか
Pay attention to the form that comes before the grammar point. Many beginner mistakes happen because the learner understands the meaning but attaches the pattern to the wrong word form.
When is どうして used?
Use どうして in situations like:
- asking reasons
- checking someone’s thinking
- reacting to surprising information
Tone and register:
- neutral; can sound direct depending on intonation
- Common in daily speech, textbook examples, and beginner JLPT questions
どうして example sentences
- どうして日本語を勉強していますか。 — Why are you studying Japanese?
- どうして来なかったんですか。 — Why didn’t you come?
- どうしてそう思いますか。 — Why do you think so?
- どうして泣いているの？ — Why are you crying?
- どうしてこの店が好きですか。 — Why do you like this shop?
Read the Japanese sentence first, then check whether the English translation matches the feeling of the whole sentence. This helps you avoid translating each piece too literally.
Nuance of どうして
The key nuance is a direct request for a reason.
This matters because learners often know the dictionary meaning but miss the speaker’s intention. In real Japanese, grammar points show attitude, politeness, contrast, certainty, desire, or context. For どうして, focus on how the pattern changes the role of the sentence.
For example:
- In conversation, it can sound curious, but can sound challenging if said sharply.
- Compared with なぜ, it feels more conversational.
どうして vs なぜ
Both どうして and なぜ can be related in beginner Japanese, but they are different.
どうして:
- common in everyday questions
- can be used by beginners in polite or casual speech
なぜ:
- slightly more formal or written
- often appears in essays, explanations, and news
Quick contrast examples:
- どうして遅れましたか。— Why were you late?
- なぜ遅れましたか。— Why were you late?
If you are unsure which one to use, ask what the sentence is trying to do: define something, ask something, show a reason, mark a subject, describe a desire, or connect ideas.
Common mistakes with どうして
Watch out for these mistakes:
- Using it when you mean “how” as a method; use どうやって
- Sounding accusatory by using a harsh tone
- Forgetting か in polite questions
A good study habit is to make one simple original sentence, then change only one part of it. That makes the function of the grammar point easier to see.
Is どうして on the JLPT?
Yes. どうして is commonly taught as JLPT N5 grammar.
That means learners should be able to:
- recognize it in reading
- understand its nuance in context
- use it in simple original sentences
For test preparation, do not only memorize the English gloss. Practice identifying the word before and after the grammar point, because JLPT questions often test structure and context together.
Practice questions for どうして
Try making your own sentences with these prompts:
- Ask why someone studies Japanese.
- Ask why a friend is busy.
- Ask why someone likes a city.
Keep the sentences short at first. Once the form feels natural, add time words, places, reasons, or contrast to make the sentence more realistic.
Learn どうして with Kanjiru
If you want to review どうして together with kanji, vocabulary, and other JLPT N5 patterns, Kanjiru helps you practice Japanese in short, focused sessions.
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