Forgotten martial arts manga title, please help a poor soul ;;

Hey there,

some time ago I read a martial arts manga but I just can't remember the name, and I don't know why I stopped reading it either.

It was about martial arts, there was a tournament (fight to death?), main character used boxing as a style (iirc), his brother was the antagonist. Feudal lords had to chose fighters to represent them or be killed, MC helped at some restaurant and was chosen because the lord was in dire need... I just can't remember the name, please help, mighty r/manga. ;_;