Sonny Chiba plays 'Doshin So' - the founder of the 'Shorinji Kenpo' system of martial arts - in this very loosely played biography.
So returns home to Osaka after Japan's surrender to end WWII; during which he was stationed as an undercover spy in China. So notes the demoralising effects of the wars aftermath upon the Japanese population; the sense of shame; and opens a dojo to help rebuild the morale of a small fishing village.
The Yakuza; rival dojo's; even the army; come to stop Doshin So and his kung-fu pupils, but none succeed.
That's practically how it plays out.
Despite it's biopic pretensions, the plot is only incidental here really, 'The Killing Machine' is all about the fight…