Yumi Shirakawa's singing voice (for the two songs in the film) is provided by noted Japanese jazz starlet Martha Miyake.
In the original Japanese version, the detectives make a big deal out of the fact that Chikako owns a television. At the time this was made, 1958, a television set was still beyond the budget of the typical Japanese family.
Among the footage deleted from the U.S. English dubbed version was a musical number in the nightclub scene involving a scantily clad dancer that was considered a little too daring for American screens at that time.
The dissolving effect was created by deflating life-sized inflatable human figures, filming them in fast-motion, and then running the film at normal speed.