The film 'Kindan no suna' (1957) does not feature any identifiable transsexual characters or themes. Its narrative focuses on other dramatic elements, therefore, an evaluation of its portrayal of transsexual identity is not applicable.

The movie does not contain any action or adventure elements.

This 1957 film does not appear to be an adaptation of any prior work with established characters, nor does it feature historical figures. Therefore, its characters are considered original to the film, and no gender swaps can be identified based on the provided definition.

This 1957 Japanese film is an original production with no indication of adapting source material or historical figures where characters were established as a different race. All characters are portrayed consistently with the film's origin and setting.