Prologue: The Birth of Hyakkimaru

Lore & Background

When Hyakkimaru was born, he appeared as a lifeless doll, missing limbs, skin, eyes, and ears, as each part had been claimed by a specific demon. Recognizing the abomination yet bound by his own ambition, Daigo ordered his wife to cast the infant into the river to hide the shame of their pact. Miraculously saved by a wandering doctor who took pity on the child, Hyakkimaru survived with prosthetic limbs crafted from wood and steel, setting him on a path that would eventually lead him back to the very demons he was born to defeat.

In Their Own Story

The river water was cold enough to steal the breath from living lungs, yet it carried the warmth of a mother's tears. The small bundle floated aimlessly, a wooden doll with iron joints bobbing against the current, unaware of the prayers that had failed him or the demons feasting on his stolen flesh. High above on the temple steps, a lord watched the water recede, believing he had washed away a curse, little knowing he had only released a storm.

Reader's Guide

The narrative arc begins with Lord Daigo's desperation during a time of famine and civil unrest. Seeking to preserve his territory, he makes a fateful bargain with twelve demons, sacrificing the body parts of his unborn son in exchange for military triumph. Upon Hyakkimaru's birth, the transaction is complete; the infant lacks eyes, ears, nose, skin, and limbs. Daigo, horrified yet unwilling to admit his sin, orders the child drowned in a river. The story pivots when an itinerant doctor rescues the baby, naming him Hyakkimaru and crafting wooden prosthetics to help him survive. This prologue establishes the central conflict: Hyakkimaru's existence is defined by what he lacks. Every demon he encounters later is a direct consequence of this initial betrayal. The narrative drive is clear from the start—Hyakkimaru must hunt down these entities, not just for revenge against his father, but to reclaim the physical form that was stolen before he could even take his first breath.

Did You Know?

• The number of body parts sacrificed corresponds exactly to the twelve demons Hyakkimaru must eventually defeat.
• Hyakkimaru's name literally means 'One Hundred Demons' or 'Hundred Demons,' a reference given by the doctor who saved him, though its deeper meaning relates to his fragmented existence.
• Lord Daigo explicitly ordered the infant to be killed or abandoned to die, hiding the evidence of his pact with evil spirits.