PrettyFluent
This is just a lesson preview. Get the interactive lesson free on PrettyFluent
❓💬

How to Say ‘(question; explanatory tone)’ in Japanese

のですか

no desu ka

[noh dess kah]

💬 Usage Tip: [〜のですか] asks for an explanation, not just a fact. It’s like "So, what’s the reason/background?" in a polite way.

🇯🇵 In Japan: This form invites you to tell a story: your motivation, research, and fit—perfect for the classic motivation question.

Phrase Breakdown

no

[noh]

explanatory nominalizer

の adds an explanatory tone (“the reason is…”). In questions, it asks for explanation/background.

Example

なぜ応募したのですか。

Why did you apply? (asking for your reasons)

です

desu

[dess]

polite copula ‘is/are’

Polite form of だ. In のです, it makes the explanation polite and formal.

Example

応募したのです。

I applied (that’s the situation/reason).

ka

[kah]

question marker

か turns the sentence into a question (polite).

Example

なぜこの会社に応募したのですか。

Why did you apply to this company?

Get the Full Learning Experience

This lesson is just a preview. Download PrettyFluent to practice pronunciation, roleplay conversations, and master vocabulary with spaced repetition.

Pronunciation Feedback

AI-powered speech recognition to perfect your accent

Spaced Repetition

Retain vocabulary long-term with smart practice

Immersive Roleplaying

Practice real conversations with AI partners

Custom Scenarios

Request lessons tailored to your specific needs

Download PrettyFluent on the App StoreGet Full Lesson

What Learners Are Saying

Teaching in Osaka and I wanted to connect with my students beyond the classroom. The everyday conversation scenarios made my Japanese feel natural, not textbook-y.

Mia S., 25, English Teacher

Moved to Tokyo and the polite vs. casual speech levels were killing me. This app breaks it all down with real scenarios. My coworkers noticed the difference in weeks.

Kevin Z., 31, Game Developer

I tried five different apps before this one. The roleplay conversations are what finally made things click. I actually remember what I learn now.

Sofia R., 31, Marketing Manager