also: はなさきしあん
noun
superficial thinking; shortsighted idea
Refers to a shallow, ill-considered plan or way of thinking that only looks at what is immediately in front of one's nose. Often used critically.
彼の提案は鼻先思案で、長期的な視点が欠けている。
His proposal is shortsighted and lacks a long-term perspective.
そんな鼻先思案では、大きな問題は解決できない。
With such superficial thinking, you can't solve big problems.