Just as good as any other, if it is taught by a reputable teacher.
Yes I'm a teenager and I've been in ninjutsu since i was 11 and i am 14 now.
Yes.
ninjutsu
Koga Ninjutsu
Ninjutsu
ninjutsu
ninjutu
Ninjutsu, the martial art practised by ninja, is a sport.
I have heard that she practices Ninjutsu.
No, they are two very different martial arts. Ninjutsu is a Japanese art that focused on spying and assassination. Kung Fu is a martial art from China, often practiced by monks as part of their daily routine.
ninjutsu, taijutsu and genjutsu
No. The ninja (or Shinobi, as they were traditionally called) practiced the martial art of Ninjutsu.
Sasuke from Naruto? He doesn't do martial arts, he just uses fantasy stuff...