Kodokan Under a Morning Moon (1957)

The picture tells of a tremendous conflict between ju-jitsu, an aggressive art practiced by vicious hoodlums led by Takamatsu, and judo, which is used only for self-defense and championed by Sugawara. All of which, comes to a mighty match between Sugawara and Takamatsu. It's loaded with dynamite, so to speak, and lasts five minutes on the screen, Sugawara, wins. Takamatsu, a poor loser, and his four ju-jitsu hoodlum companions later ambush Sugawara in the woods. This turns out to be a mortal combat. You'd like to learn the outcome, wouldn't you?

Unfortunately the movie Kodokan Under a Morning Moon is not yet available on HBO Max.