Kurogane

A young samurai named Jintetsu is killed by a group of dogs and discovered by Genkichi, a reclusive inventor. Genkichi constructs a new, unbreakable steel body for Jintetsu and equips him with a speaking sword to help him seek revenge. Despite his new form, Jintetsu struggles with emotional turmoil, particularly over Otsuki, the girl he abandoned. While his steel body protects him from physical harm, it offers no relief from the sorrow he carries.