@shibao @sun
Seriously though... Back in the 1920s, then-soke of our collection of schools, Takamatsu, was known for training by ripping bark off the trees with his hands. So, by 1950s his hands became into something like hardened claws. He told his successor, Hatsumi, not to do that. Instead, his will was to focus on the improvised weapons and the universal approach. "There is no need to turn your body into a weapon when you're surrounded by weapons."