And I was hoping we would get to see what happens when someone hits below 0 HP ;3

Stupid lucky rolls for Focus XD

Jk, jk. If its a non-lethal held back blow then it would be like a duel in an MMO. You can only get reduced to 1 HP. Mike currently has 25 HP left as he pretty much just lost 3/4ths of his HP in one hit. 

A tank he is not (which is why STR is important. You need to build that shit up and put points in it if you are gonna do melee, otherwise your melee attacks will be crap and do crap. Also you will not be able to advance in the Senshin no Ken properly, thought I should mention that. I recommend getting Str and Dex to 10 first using some of your next stat points from level ups.