Hanakosan (1943, TOHO, MAKINO Masahiro), a thoroughly light and joyful musical comedy, influenced by Busby Berkeley films, against the national policy under the wartime, was made into a film from comic serials by SUGIURA Yukio published in a magazine.

Set in wartime at the Yawata Steel Works in Tobata, Yawata, and Kokura cities in Fukuoka Prefecture, the film depicts people taking on the evil blast furnaces that prevent increased production. The film was shot on location at the actual Yawata Steel Works for an extended period of time, and special effects were created using a miniature blast furnace that closely reproduces the actual one.

Mysterious incidents occur one after another on the express train as it plows through the dark night on the railroad tracks! The first woman is robbed! The second woman is almost killed! The third woman attempts suicide!