TV-Series
Description
Jisai Kanemaki is a figure from the past in the world of Orient, whose actions and sacrifice cast a long shadow over the story's present. He was a tall, well-built man with long tied-back hair and a noticeable scar on the left side of his face. His most distinguishing physical trait was the loss of his right leg, which forced him to rely on a walking stick for mobility, though he still carried a sword bound in chains at his side. He typically wore a light-colored kimono, and his son, Kojiro, would grow up to greatly resemble him in appearance.

Fifteen years before the main events of the story, Jisai was a member of the Uesugi band, a group of Bushi warriors. During this time, he achieved a significant feat by exterminating a Kishin, a powerful demon, an act that earned him the title of "hero." Although his fame did not reach the level of the "Five Great Generals," he was highly respected by other Bushi, including members of the Hojo band. Shortly after this accomplishment, however, he disappeared from the land of Hinomoto and was presumed dead by many.

In reality, Jisai had taken on a secret and crucial role. He became the "Obsidian Goddess's Sheath," a guardian tasked with protecting Musashi, who was the "Vessel of the Obsidian Goddess." To fulfill this duty, he went into hiding in a rural village governed by the very Kishin he had fought against. Living under the constant threat of discovery, Jisai raised two boys together: his biological son, Kojiro, and his charge, Musashi, who was around the same age. He taught them both swordsmanship and the ways of the Bushi, instilling in them a desire to become formidable warriors. Despite the harshness he faced from townsfolk who distrusted his Bushi lineage, Jisai remained a kind and calm man. He loved his son deeply and was proud of his ancestors, always encouraging Kojiro to be proud of being a descendant of the Bushi.

Jisai's hidden life eventually came to an end when his location was discovered by the Obsidian Eight, a powerful group of enemies. In a desperate act to save Kojiro and Musashi, he was captured and executed through a brutal method known as cow tearing punishment, where his body was torn apart. This traumatic event had a profound and lasting impact on both boys. While Musashi clung to his ambition of becoming a Bushi, the experience instilled a deep trauma and a strong negative impression in Kojiro, leading him to doubt the existence of Bushi and his father's teachings. Even in death, Jisai's legacy endured, as his final moments included an act of forgiveness toward Musashi for a childhood transgression, which only steeled Musashi's dedication to the ideals Jisai had imparted.

Jisai was primarily a swordsmanship instructor, and his notable ability was training the next generation. He painstakingly taught Kojiro and Musashi the martial arts and the philosophy of the Bushi, shaping them into warriors who would carry on his legacy. Beyond his combat skills, his most significant power was his unwavering resolve as a guardian, sacrificing his life to protect the vessel of the Obsidian Goddess and secure a future for the boys he raised as his own.