The Japanese engineers must be quite stupid in designing camera systems for their countrymen if they don't consider the environment they are in!!!!!
Documentaries of the Artic and Antartic are made with similar cameras and video devices. The images came out crisp and sharp.
When aircrafts fly at 10,000m the outside temperature can be minus 50 degrees C or lower. The onboard camera of the flight still function (you see the flight on your personal in-flight screen)
.... So dont worry... Handle your camera the way you keep your baby warm and you'll be fine........