Speakable Japanese

How to Ask "Why?" in Japanese: Finding Reasons (Doushite)

Welcome to Speakable Japanese! You have learned to ask many questions with "what," "where," "who," and "when"!
In this lesson, we will learn the very powerful question word "どうして" (why), which will make your conversations much deeper. By asking "why?", you can learn the reasoning behind your conversation partner's thoughts and actions. Your Japanese will evolve from a simple exchange of information to communication for mutual understanding!

🎯 Lesson Goal

Learn to ask about the reason for actions and situations using 「どうしてですか？」 (Doushite desu ka?) and to answer by giving simple reasons!

Step 1 Discover

Let's look at how this is used in a real conversation. Two friends are talking about work and plans.

👩
Sarah

明日、仕事を休みます。

(Ashita, shigoto o yasumimasu.) — I'm taking a day off from work tomorrow.

👨
Ken

え、どうしてですか？

(E, doushite desu ka?) — Oh, why?

💡

Did you notice?

"どうして" corresponds to the English "Why". You can use it by simply asking "どうしてですか？" in response to your partner's statement or about a current situation!

Step 2 The Pattern

Here is how to answer a question about the reason using "〜からです".

Basic Chunk

どうして か？

(Doushite ka?)

🔑 Key Point: The Particle 'から' (kara)

The particle 「から (kara)」 indicates the reason, and 「です (desu)」 politely concludes the sentence.
Example: Q: どうして日本語を勉強しますか？ (Why do you study Japanese?) → A: アニメが好きだからです。 (Because I like anime.)

🌟 Pro Tip: Question Formula

The formal structure for asking reasons is どうして + [Sentence] + か？ (Doushite + Sentence + ka?).

Step 3 Pattern Practice

Practice asking and answering with different examples. Read these out loud!

  • Question Why were you late? (遅れましたか？)

    電車が遅れた からです。

    (Densha ga okureta kara desu.)

  • Question Why do you like this restaurant? (レストランが好きですか？)

    とても安くて、美味しい からです。

    (Totemo yasukute, oishii kara desu.)

  • Question Why did you start studying Japanese? (日本語の勉強を始めましたか？)

    日本の文化に興味がある からです。

    (Nihon no bunka in kyoumi ga aru kara desu.)

Step 4 Make It Yours!

Now it's your turn! Create questions about reasons you really want to know using the Cheat Sheet below.

👉 どうして YOUR REASON からです。

Vocabulary Cheat Sheet

Reason Phrases (理由のフレーズ)

  • しごとがあります have work
  • じかんがありません have no time
  • おかねがありません have no money
  • てんきがいいです weather is good

Preferences & States (状態・好み)

  • 日本がすきです like Japan
  • アニメがすきです like anime
  • べんりです is convenient
  • おもしろいです is interesting

Bonus Go Beyond the Basics

In real life conversations, you will also want to state negative reasons (like "because I didn't sleep") and use casual phrasing with friends. Here is how!

🌙 1. Negative Reasons (...kara desu vs ...kara)

Softer / Flowing Explanation

寝ませんでした から。

(Nemasen deshita kara. - Because I didn't sleep.)

Plain Form Reason

ねなかった から。

(Nenakatta kara.)

🤝 2. Casual & Friendly Style

Casual Question

どうして？

("Why?" - dropping "desu ka" with friends)

Casual Answer

すき だから！

(Suki da kara! - Because I like it!)

Summary Lesson Review

Asking "Why": Use どうして (doushite) to ask for the reasoning behind actions or thoughts.

Giving Reasons: End your answering sentence with the particle 「から」(kara) to indicate the reason (Because...).

Casual Style: With friends, ask "Why?" just by saying どうして？ and answer with だから！ (da kara!).

Practice Drill

1 / X Polite

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