Hayashi Ha Shito Ryu, pure Okinawan combat karate with no frills. We didn't train with pads and rarely with gloves. Many broken bones and bloody faces during sparing. We also conditioned our arms, legs, neck, chest and abdomen by striking with fists or buko weapons.

At my peak many years ago I could punch/kick through a concrete block wall with ease, block a baseball bat with my forearms and take a hard hit in the throat or balls with no affect.

Note: A little 22lr pistol will undo all of my training in a blink of an eye...