自じ己こ投とう資し

noun, noun or participle which takes 'suru'

self-investment; investing in oneself

Refers to spending time, money, or effort on personal development, such as education, skills, health, or appearance. Often used in self-help and career contexts.

• 語ご学がくの勉べん強きょうは最さい高こうの自じ己こ投とう資しだ。

  Studying languages is the best investment in yourself.

• 彼かれは自じ己こ投とう資し