martial arts stadium; martial arts hall
Generic term for a large hall or stadium designed for martial arts events, such as judo, kendo, or karate tournaments.
The national tournament was held at the martial arts stadium in Osaka.
Nippon Budokan; Budokan
Refers specifically to the famous indoor arena in Tokyo, known for hosting martial arts events and major concerts.
Next month, my favorite artist is having a concert at the Budokan.