Nobody talks about this one. A fallen samurai turned into an immortal weapon tears through 1580 Japan while a ninja vendetta hunter pursues him across a landscape where future tech and feudal blades coexist, and the violence isn't stylized, it's blunt, anatomical, real. The story doesn't care about explaining itself; it just moves, kills, and ends before you catch your breath. This is pure 90s OVA excess: ninety minutes of blood and momentum, nothing more, nothing less.

In 1580, Nobunaga Oda stands close to seizing all of Japan by force, backed by an army carrying advanced weapons. Among his enforcers is Ginnai Doma, a fallen samurai brought back as a killing machine that cannot be destroyed. Ginnai cuts down ninjas and anyone else who resists Nobunaga's rule. Shishimaru of the Iga Ninja sets out alone to avenge his slain comrades and destroy the immortal warrior, acting against the plans of the Koga Ninja. One warrior against a deathless enemy. The result is a single-episode OVA that mixes action and adventure with science fiction in a feudal setting.