noun
theatrical world; the stage
Refers to the world of theater as a professional or artistic community, not a physical stage. Often used in contexts like 劇壇にデビューする (make one's debut on the stage/in the theater world).
彼は若くして劇壇にデビューした。
He made his debut on the stage at a young age.
彼女は劇壇で高い評価を得ている。
She is highly regarded in the theatrical world.