Translation guide
To work hard, focus, or dedicate effort to a task or goal.
Expressing that someone works diligently or puts serious effort into something.
A very common and natural way to say 'work hard' or 'do one's best'. It implies putting in your utmost effort.
試験のために一生懸命頑張っている。
I'm applying myself to studying for the exam.
Means 'to make an effort' or 'to strive'. It's a standard, slightly formal verb for applying oneself.
Emphasizing mental focus or concentration on a specific activity.
Means 'to concentrate'. It's the most direct way to express focusing one's attention.
勉強に集中しなさい。
Apply yourself to your studies.
Expressing long-term dedication or commitment to a field, study, or cause.
Do not translate 'apply oneself' literally as 自分を適用する (jibun o tekiyou suru). This is nonsensical in Japanese. Use the expressions above instead.
彼は目標を達成するために努力した。
He applied himself to achieve his goal.
Literally 'to tackle something seriously'. It emphasizes a sincere, diligent approach to a task.
仕事に真面目に取り組んでください。
Please apply yourself to your work.
An idiomatic expression meaning 'to devote oneself to' or 'to work hard at'. Slightly literary or formal.
彼は研究に精を出している。
He is applying himself to his research.
Literally 'to put one's body into'. It means to put one's heart and soul into something, to apply oneself earnestly.
仕事に身を入れなさい。
Apply yourself to your work.
Means 'to devote oneself to' or 'to be absorbed in'. It implies passionate, wholehearted engagement.
彼はボランティア活動に打ち込んでいる。
He applies himself to volunteer work.
Means 'to devote oneself exclusively' or 'to concentrate on'. Often used for focusing on one thing.
彼女は研究に専念している。
She is applying herself to her research.