This is a very obscure film from 1956. Kataoka Chiezo stars as Tarao, a detective who attempts to destroy a gun smuggling ring.
He gets between two rival gangs and slowly but surely brings them against each other. He uses seven different disguises to accomplish this task as he gets deeper and deeper into danger.
The performances are good by all involved and if you like obscure Japanese crime dramas with a film noir flavor you might like this unknown gem.