powers of observation; observational skills
Refers to the ability to notice details, patterns, or changes in one's surroundings. Often used in contexts like detective work, science, art, or parenting.
With his sharp powers of observation, he saw through to the truth of the case.
観察力を養うには、日頃から周りをよく見ることが大切だ。
To develop your observational skills, it's important to pay close attention to your surroundings on a daily basis.