Highly appraised in overseas academic conferences, this is a film of Hokkaido University “Professor of Snow” Nakaya Ukichiro’s (1900–1962) research in a cryogenic laboratory. Cinematographer Yoshino Keiji (1906–1972), who came from narrative film, photographed the figures of the glasswork-like snow crystals. In later years he was a successful producer for Iwanami Productions.