Born in the damp shadows of a Kyoto brothel in 1582, Fukushūko enters a world that has already stolen everything from him. His father was Yasuke, the legendary African giant who rose to become the trusted samurai of the great warlord Oda Nobunaga, only to vanish into smoke when the Demon King was betrayed. His mother was Hatsu, a proud palace court attendant cast into exile and poverty following the slaughter. Left a silent, striking orphan with skin like midnight stone, Fukushūko’s life is cheap—until he is bought by the master strategist Sanada Yukimura.
Forged in the brutal crucible of the northern mountains, Fukushūko learns the deadly arts of the sword, inheriting his parents’ sacred weapons: his father’s heavy Bizen katana and his mother’s elegant wakizashi. When he reclaims his father’s long-lost bajō-zutsu—a devastating matchlock pistol customized for a giant's hands—he sets out onto the blood-slicked highways of Japan to discover the truth of his origins.
As a masterless rōnin for hire, Fukushūko navigates a nation tearing itself apart. He protects the weak, fights off corrupt syndicates, and clashes with ruthless warlords, earning the terrifying moniker of the Kuro-oni—the Black Demon. But when he finally seeks a quiet life of peace, his violent past returns to extract a devastating toll. Driven by an all-consuming fire of vengeance and loyalty, Fukushūko is pulled into the apocalyptic flames of the historic Siege of Osaka Castle.
When the dust settles and the samurai era crumbles, his destiny shifts from the soil of Japan to the open ocean. Armed with a hidden journal, his family's steel, and a revelation from a Jesuit missionary, the lone warrior sails boldly toward a distant continent to claim the birthplace of the giant who started it all.
An epic historical fiction adventure weaving raw martial arts action, political intrigue, and an unforgettable journey across two worlds.