せいしょうねん青少年seishounen
1.
A term that encompasses individuals in the transitional age group between childhood and adulthood, typically ranging from approximately 12 to the mid-20s, including both males and females.
2.
Refers to the collective group of young individuals, often characterized by their development, vitality, and social dynamics as they navigate the journey towards maturity.
Example:
私には青少年の心理がわからない。