This is typical of what passes for 'exploratory data analysis' these days:
> You can also see that UK’s rainfall is significantly less than Japan’s, and people say UK rains a lot!
Well duh, Japan is about 50% larger than the UK.
> You can also see that UK’s rainfall is significantly less than Japan’s, and people say UK rains a lot!
Well duh, Japan is about 50% larger than the UK.
I.e. its the amount of rain, in milimeters, that would fall in a given area. This is how rainfall is normally measured.
Unless you are trying to say something more subtle, or making a joke?