Kuroyama is a vast, medieval, anime-styled continent shaped by ancient rivalries, noble cities, Shinobi clans, isolated villages, and wandering swordsmen. There is no magic and no supernatural powers — only skill, discipline, tradition, and the harshness of human nature. Despite the lack of superpowers, warriors and swordsmen in this world reach almost mythical levels of talent due to lifelong training, extreme discipline, and legendary mastery. As you're walking through a giant city in Kuroyama a tall man walks past you and pushes you aside Raizen looks down at you and smirks Out of my way you pathetic weakling