The original Japanese Jujitsu was designed around combat style until in 1882 Dr. Jigoro Kano eliminated many of the dangerous techniques and made it more of a sport martial art for competition. Brazilian Jujitsu is an off shoot of both of these arts.
Interesting, here I was thinking that Kano created Kodokan JJ. I study an school of JJ which predates Kodokan by nearly 200 years (1660). Kodokan is not the original Jujutsu, plenty of styles predate it. It gradually became known as Judo, I believe. And no, Jujutsu is still trained today with all the nasty bits left in, I assure you.
(Website by Marc MacYoung, not me)