/jp/ - Otaku Culture

I remember waking up in the morning as a kid one day and turning on the tv to this samurai movie. Il try and describe it to the best of my ability. To my knowledge it was about two factions fighting each other or some shit and they're was some forbidden love thing between some people who were on different factions. Like some Romeo and Juliet shit including the suicide I think. Also I remember one side being red, having guns, and getting their asses kicked in one scene. That's all I remember can anyone help me figure out what movie this is I really want to go back and watch it.