How important do you consider kihon training in karate? By this I mean basic techniques done in lines. Do we know if this was done in ancient Okinawa? There is an emphasis on having good "basics" in many clubs with instructors also putting great respect for having good basics. How important is this to having good technique? Isn't it already done enough in kata practice? Wouldn't we be better of training these techniques in more realistic ways on some form of impact equipment? Also, if one has achieved high rank, for example brown or black belt, is it really that important to keep training oi-zukis in every class? Would be great to get some opinions about this.