How to say "academia" in Japanese

• 学界がっかいCommon
  nounCovers academia in the sense of the academic world or academic circles: the community of scholars and researchers as a whole. Typical contexts include a scholar's reputation, debate, or new developments within it.
• アカデミーCommon
  nounSeldom the word you want for academia as the scholarly world: it really denotes an academy, a specific institution or society, rather than the academic community at large.

Use 学界 for academia as the collective world of scholars and research; 「アカデミー」 normally names a specific academy or institution, so it is seldom the natural choice for that general sense.

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

• 学界がっかいacademic world
• アカデミアacademia
• 文ぶんthe literary arts (as opposed to the military arts)
• アカデミーacademia