Early childhood; a person's early years of life, often referring to the period from infancy through the years before or around early elementary school.
彼は幼少期にピアノを習っていた。
He learned piano in his early childhood.
幼少期の思い出が今でも鮮明に残っている。
Memories from early childhood still remain vivid.
幼少期の環境がその後の性格に影響することがある。
Early childhood environments can sometimes influence later personality.