fixing one's aim in life; deciding one's life goal
A somewhat formal or literary noun for the act of determining one's life purpose or aspiration, often used in contexts of self-improvement or career planning.
He fixed his aim in life when he was young and aimed to become a doctor.
He is known as a person whose life story is about achieving his ambitions.
success story
coming-of-age ceremony for middle school students
Compound of 立 (りつ, 'to stand, establish') and 志 (し, 'will, aspiration'). The reading りっし is a regular sound change from りつし.