Body code trivia

The film shown in the cinema earlier was director Kaizo Hayashi's debut, Sleeping Like a Dream.

All kinds of passwords in the movie were conceived by cryptographers Yoshida Kazuhiko and Kaizo Hayashi who had written cryptography.

Japan's only two Enigma password opportunities appeared in the film.

The film crew came to Shanghai to shoot from August to September last year. The summer heat in Shanghai has brought a lot of challenges to many Japanese actors. Kikunosuke Onoe said that his role is mysterious and not suitable for sweating, so he tried to hold back the sweat in hot weather and felt that he had been fighting the sweat. Inamori and Izumi had long heard that Shanghai was very hot, so they bought a coat with a fan to take with them, which was very useful.

Mei Sang Lan wrote a Japanese folk song Ode to Early Spring, but I don't know who to find to translate it into an ambiguous Chinese version. Later in the story, the original Japanese version appeared when dancing solo on the rooftop.