()のせい

きのせい
expression, noun
one's imagination, just imagining things
1. one's imagination, mere fancy, just thinking too much
Used when something seems to be the case but is probably not real — just a product of one's mind. Often used to dismiss a vague impression or feeling.
()のせいだよ。
You're just imagining things.
(なに)()こえた()がしたが、()のせいだった。
I thought I heard something, but it was just my imagination.
()のせいか、彼女(かのじょ)最近(さいきん)(すこ)元気(げんき)がないように()える。
Maybe it's just me, but she seems a little less cheerful lately.

A very common everyday expression used to suggest that a perception or feeling is not based in reality. Literally 'because of one's mind/mood.'

COMMON PATTERNS:

  • ()のせいだ: it's just one's imagination
  • ()のせいか...: maybe it's just me, but...
  • ()のせいだと(おも)う: I think it's just my imagination
  • ()のせいではない: it's not just one's imagination (confirming something is real)

USAGE:
()のせいか is often used at the start of a sentence when the speaker is unsure whether their observation is real or subjective. It softens the statement and invites the listener to confirm or deny.

SIMILAR WORDS:

  • 勘違(かんちが)い: misunderstanding — a concrete mistake in judgment, not just a vague impression
  • (おも)()ごし: overthinking, reading too much into things — implies excessive worry