noun
underground theatre; underground drama
Refers to experimental, avant-garde, or countercultural theatre, often performed in small, non-mainstream venues. The term is a wasei-eigo compound from 'underground' and 演劇.
彼はアングラ演劇の旗手として知られている。
He is known as a leading figure in underground theatre.
昨夜、小さな劇場で
Last night I saw an underground play at a small theatre.