national theater
Refers to a government-established theater for performing arts, especially the National Theatre of Japan in Tokyo.
国立劇場で歌舞伎を見ました。
I saw a kabuki performance at the National Theatre.
国立劇場 is a specific government-run theater (especially the National Theatre of Japan), while 劇場 is the general word for any theater, public or private.
Compound of 国立 (national) and 劇場 (theater).