childhood amnesia; infantile amnesia
Medical/psychological term for the inability of adults to recall memories from early childhood, typically before age 3–4.
Childhood amnesia is a phenomenon that many people experience.
I learned about infantile amnesia in psychology class.
Compound of 幼児期 (early childhood) and 健忘 (amnesia). The exact derivation is straightforward; the term is a direct translation of the English medical concept.