のせいか

could it be because of

→ の

phrase Uncommon #10,977

could it be because of Used to suggest or ask whether something is the cause, often with a negative or undesirable result. のせい means “because of” or “due to,” with a nuance of blame, and か indicates uncertainty or a question.

JA: 寝不足のせいか、今日はずっと眠い。

EN: Could it be because I didn't get enough sleep that I'm sleepy all day today?

眠いのはウイルスのせいかな

I wonder if the virus is making me sleepy.

— グエムル -漢江の怪物- (2006)

（街の人Ｄ）えっ地震のせいかな

(Townsperson D) Huh, I wonder if it was because of the earthquake.

— すずめの戸締まり (2022)

気のせいかと思ったらほんとに量減ってるんだな。

I thought it was just my imagination, but they really have reduced the amount.

イノシシのせいか

Could it be because of the wild boar?

— ミッション・クレオパトラ (2002)

オーブンのせいか？

Is it because of the oven?

— パディントン２ (2017)

マハのせいか？

Is it because of Maha?

— ソング・オブ・ザ・シー海のうた (2014)

あの老人のせいかも

Maybe it’s because of that old man.

— REC / レック (2007)

僕の気のせいかな。

Maybe it's just my imagination.

年齢のせいか揚げ物が少ない弁当を選ぶようになった。

Maybe it’s because I’m getting older, but I’ve started choosing bento boxes with less fried food.

遺伝子のせいかな

I wonder if it’s because of genetics.

— AKIRA (1988)

レシピを書いておいてくれたら…今度はママのせいか

If only you’d written down the recipe… So this time it’s Mom’s fault, huh?

— アイム・スティル・ヒア (2024)