well first off he's right, the jo did beat musashi... my personal preference is actually the bo, I've always loved it, but I do appreciate the jo as well. I find that the nature of both weapons is quite simular and you could easily apply many of the techniques with either weapon. In praticality, which was the question asked, i would agree that the jo is probably more common, but if one looks hard enough a 6 foot staff is never far off