I definately think that something like krav maga would be much, much better for self-defense. You have to remember that juijutsu was originally about big, strong guys trying to kill other big, strong guys on a battlefield. Most women aren't going to be strong enough to really apply whatever juijutsu training they might have in a street fight scenario. Krav maga involves much more modern techniques. Disarming someone with a knife or gun (mugger), defending yourself against multiple attackers (a group of thugs), places to strike when a bigger stronger person is assaulting you (groin, throat), ect...
"I don't want them to like me, because when I'm in the ring, punches fly to the face. It is not a tenderness time. I am not falling in love. And he knows that when the fight starts I am kicking faces."
- Wanderlei Silva