noun
fruit of diligent study
A literary set phrase referring to the achievements gained through painstaking study, often evoking the classical image of studying by the light of fireflies and snow. Used in formal or written contexts.
彼の成功はまさに蛍雪の功だ。
His success is truly the fruit of diligent study.
蛍雪の功を積んで、彼は難関
Having accumulated the fruits of diligent study, he passed the difficult exam.