1-shorin ryu
2-yes we spar
3-I Only spar with my sensei , around 2-3 times a year in full contact and rest of the year accusing each other of cheap shotting and it gets pretty ugly, at least for me, as for Kyukoshin style sparing, it's good but not realistic, i get knock down or lose balance almost always by direct punch to the face , the chance of getting hit by punch to the face is not less than kick to the head if not more,