On one hand, it's a rather average Nikkatsu. Although it has a singing lead (in Kobayashi's contract, I suppose) it becomes even more average by the film's attempt to turn Shinji into a kind of itinerant, loner do-gooder a la Zatoichi. Clearly it never took off.
Maybe the first miso-western. A perfect example of the later akushon films Nikkatsu would be known, presenting one of its most important teen idols, Akira Kobayashi, who would later star in such delirious cinematic pieces such as Black Tight Killers. Borderless Japan and Nikkatsu taking over the world without any help from the taiyouzoku.