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How to Say ‘What is the reason?’ in Japanese

理由は何ですか。

riyuu wa nan desu ka

[ree-YOO wah nan dess ka]

💬 Usage Tip: 何ですか is said (nan desu ka). Before です, 何 is read (nan), not (nani).

Phrase Breakdown

理由は

riyuu wa

as for the reason

理由 (riyuu) means 'reason'; hold the final 'yū' long. は is pronounced 'wa'.

Example

理由は簡単です。

The reason is simple.

Words in this phrase

理由

riyuu

[ree-YOO]

reason

The cause or reason for something.

Example

理由を教えてください。

Please tell me the reason.

は

wa

[wah]

topic marker; as for

Marks 'today' as the topic. Written は but pronounced 'wa.'

Example

本日はお時間をいただき、ありがとうございます。

Thank you for giving me your time today.

何ですか。

nan desu ka

what is it?

何 (nan) means 'what'. ですか (desu ka) makes it a polite question. Say it 'nan desu ka'.

Example

これは何ですか。

What is this?

Words in this phrase

何

nan

[nan]

what

何 means what; in 何時 it helps ask 'what time'.

Example

何時に始まりますか。

What time does it start?

です

desu

[dess]

is; polite copula

A polite sentence ending used in formal conversation.

Example

少し伺いたいです。

I would like to ask a little.

か

ka

[ka]

question particle

Used to create a yes/no question in informal speech.

Example

行くか?

Shall we go?

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