The sword is the soul. Study the soul to know the sword. Evil mind, evil sword.

Ryunosuke, a gifted swordsman plying his trade during the turbulent final days of Shogunate rule, has no moral code and kills without remorse. It’s a way of life that leads to madness.
The Sword of Doom keeps every mind human — it fights its subject at zero distance. The story fights on E8/E9 of the E0–E14 reality ladder.
Films fighting at the same level of reality, about the same things.
The same preoccupations examined at another scale — one mind versus a nation.