under someone's nose

Prepositional phrase

idiomatic

(idiomatic) directly in front of one; clearly visible / (idiomatic) obvious or apparent

Japanese Meaning

文字通り『誰かの鼻のすぐ下』にある、つまり非常に近く、目に見える場所にある状態を示す / 隠されていない、明らかで顕著な状態を意味する

The missing keys were sitting under someone's nose the whole time, but no one noticed them.

その行方不明の鍵はずっと誰かの目の前にあったのに、誰も気づかなかった。

Sense（1）

(idiomatic) directly in front of one; clearly visible

I searched for my glasses for twenty minutes, and finally found them right under my nose.

Sense（2）

(idiomatic) obvious or apparent