How to say "learned" in Japanese

• 後天的こうてんてきCommon
  na-adjectiveCovers learned in the sense of acquired rather than innate, as with behaviour or characteristics developed through experience. It contrasts directly with innate or hereditary, so it suits scientific or academic descriptions of traits.
  その習慣しゅうかんは後天的こうてんてきで、先天的せんてんてきなものではない。↗

  That habit is acquired, not innate.
• 博識はくしきCommon
  na-adjectiveCovers learned as in erudite and well-informed. It describes a person of broad, deep knowledge, so call a colleague or writer learned with this word, not for learned behaviour or habits.

Use 後天的 for learned behaviour or characteristics acquired through experience rather than innately, and 博識 for a learned, knowledgeable person; the two senses rarely overlap.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 後天的こうてんてきacquired (e.g. characteristic)
• 有識ゆうしきwell-informed
• 造詣深いぞうけいふかいscholarly
• 学のあるがくのあるeducated
• 博識はくしきlearned