This could have been a decent enough spy drama though is let down by whimsy and stereotypes.
Rocky (Steve Forrest) and Archie (Archer MacDonald) are two American soldiers on leave from the Korean War. They head to Tokyo, there they find their uniforms keep them out of interesting bars. They instead buy some clothes from a Japanese tailor, by coincidence the shop is the front for a diabolically evil scientist who had developed a bomb so powerful it makes the atom bomb look like a firework. Archie heads off with an example of this new bomb (which is pill sized) in his pocket...
The gang leader Nakano (Tetsu Nakamura) invites the guys back to his home, where he just so happens to have a geisha school. The guys also bring along flight attendant Peggy (Martha Hyer) who is secretly an Allied agent. Nakano and his inept thugs try repeatedly to get back the pill-bomb...
Fairly light hearted and quite ridiculous, this could though have been a solid enough spy film but is let down by the ridiculous Archie character. Obviously used for comic relief though he mostly succeeds in being pretty annoying. The bizarre hypnotist Zoro (Dekao Yokoo) is quite something though.