The period of adolescence or youth when a person grows from childhood into adulthood; includes physical, psychological, and social changes.
青年期は自我が確立される大切な時期です。
Adolescence is an important period when the self becomes established.
多くの教育制度は青年期に必要な支援を重視している。
Many educational systems emphasize support needed during adolescence.
彼は青年期に海外で生活した経験がある。
He has the experience of living abroad during his youth.