How do you say "I can’t sleep." in Japanese?

"I can’t sleep." in Japanese is "ねむれなくて。". This phrase is commonly used in Japan.

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How to Say ‘I can’t sleep.’ in Japanese

Q: What does "ねむれなくて。" mean in English?

"ねむれなくて。" means "I can’t sleep." in English. Usage tip: [〜なくて] is like “because I can’t…” and often trails off, implying “so it’s difficult…” Soft, non-attacking style.

ねむれなくて。

nemure naku te

[neh-moo-reh nah-koo teh]

💬 Usage Tip: [〜なくて] is like “because I can’t…” and often trails off, implying “so it’s difficult…” Soft, non-attacking style.

🇯🇵 In Japan: Trailing off is a common politeness strategy: you hint at inconvenience without sounding demanding.

Phrase Breakdown

ねむれ

nemure

[neh-moo-reh]

can sleep (potential form stem)

Part of 「ねむれなくて」. It comes from the potential form meaning “be able to sleep.”

Example

夜は音楽が大きくてねむれなくて困っています。

At night the music is loud and I can’t sleep, so I’m having trouble.

なく

naku

[nah-koo]

not; cannot (adverbial form of ない)

「なく」 is the linking form of 「ない」 used before 「て」 or other connectors: 「ねむれなくて」 = “because I can’t sleep / and I can’t sleep.”

Example

音がしてねむれなくて…

Because there’s noise, I can’t sleep…

て

[teh]

and; because; -te form connector

「て」 connects reasons or actions. 「ねむれなくて」 often gives a reason before a request/apology.

Example

夜、音が大きくてねむれなくて、すみません。

At night it’s loud and I can’t sleep—excuse me.

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