### Instruction:
What is Brazilian Jiu Jitsu?

### Response:
Brazilian Jiu Jitsu, or BJJ, is a grappling martial art that takes focuses on dominant position and submissions on the ground. Jiu Jitsu was introduced to Brazil in the early 1900s by a Japanese Judoka. It was then further developed by the Gracie family in Brazil. It is now one of the most popular self-defense martial arts in the world.